Class LinqExtensions

Contains extension methods for LINQ queries.

Inheritance

System.Object

LinqExtensions

Namespace: LinqToDB

Assembly: linq2db.dll

Syntax

public static class LinqExtensions : object

Properties

ExtensionsAdapter

Declaration

public static IExtensionsAdapter ExtensionsAdapter { get; set; }

Property Value

Type	Description
IExtensionsAdapter

ProcessSourceQueryable

Gets or sets callback for preprocessing query before execution. Useful for intercepting queries.

Declaration

public static Func<IQueryable, IQueryable>? ProcessSourceQueryable { get; set; }

Property Value

Type	Description
System.Nullable<Func<IQueryable, IQueryable>>

Methods

AsCte<TSource>(IQueryable<TSource>)

Specifies a temporary named result set, known as a common table expression (CTE).

Declaration

public static IQueryable<TSource> AsCte<TSource>(this IQueryable<TSource> source)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.

Returns

Type	Description
IQueryable<TSource>	Common table expression.

Type Parameters

Name	Description
TSource	Source query record type.

AsCte<TSource>(IQueryable<TSource>, Nullable<String>)

Specifies a temporary named result set, known as a common table expression (CTE).

Declaration

public static IQueryable<TSource> AsCte<TSource>(this IQueryable<TSource> source, string? name)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
System.Nullable<System.String>	name	Common table expression name.

Returns

Type	Description
IQueryable<TSource>	Common table expression.

Type Parameters

Name	Description
TSource	Source query record type.

AsQueryable<TElement>(IEnumerable<TElement>, IDataContext)

Converts a generic to Linq To DB query.

Declaration

public static IQueryable<TElement> AsQueryable<TElement>(this IEnumerable<TElement> source, IDataContext dataContext)

Parameters

Type	Name	Description
IEnumerable<TElement>	source	A sequence to convert.
IDataContext	dataContext	Database connection context.

Returns

Type	Description
IQueryable<TElement>	An that represents the input sequence.

Type Parameters

Name	Description
TElement	The type of the elements of source.

AsSubQuery<TSource>(IQueryable<TSource>)

Defines that sub-query is mandatory for source query and cannot be removed during the query optimization.

Declaration

public static IQueryable<TSource> AsSubQuery<TSource>(this IQueryable<TSource> source)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.

Returns

Type	Description
IQueryable<TSource>	Query converted into sub-query.

Type Parameters

Name	Description
TSource	Source query record type.

AsSubQuery<TSource>(IQueryable<TSource>, String)

Defines that sub-query is mandatory for source query and cannot be removed during the query optimization.

Declaration

public static IQueryable<TSource> AsSubQuery<TSource>(this IQueryable<TSource> source, string queryName)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
System.String	queryName	Query name.

Returns

Type	Description
IQueryable<TSource>	Query converted into sub-query.

Type Parameters

Name	Description
TSource	Source query record type.

AsSubQuery<TKey, TElement>(IQueryable<IGrouping<TKey, TElement>>)

Defines that sub-query is mandatory for grouping query and cannot be removed during the query optimization.

Declaration

public static IQueryable<TKey> AsSubQuery<TKey, TElement>(this IQueryable<IGrouping<TKey, TElement>> grouping)

Parameters

Type	Name	Description
IQueryable<IGrouping<TKey, TElement>>	grouping	Source data query.

Returns

Type	Description
IQueryable<TKey>	Query converted into sub-query.

Type Parameters

Name	Description
TKey	The type of the key of the .
TElement	The type of the values in the .

AsSubQuery<TKey, TElement>(IQueryable<IGrouping<TKey, TElement>>, String)

Defines that sub-query is mandatory for grouping query and cannot be removed during the query optimization.

Declaration

public static IQueryable<TKey> AsSubQuery<TKey, TElement>(this IQueryable<IGrouping<TKey, TElement>> grouping, string queryName)

Parameters

Type	Name	Description
IQueryable<IGrouping<TKey, TElement>>	grouping	Source data query.
System.String	queryName	Query name.

Returns

Type	Description
IQueryable<TKey>	Query converted into sub-query.

Type Parameters

Name	Description
TKey	The type of the key of the .
TElement	The type of the values in the .

AsUpdatable<T>(IQueryable<T>)

Casts query to IUpdatable<T> query.

Declaration

public static IUpdatable<T> AsUpdatable<T>(this IQueryable<T> source)

Parameters

Type	Name	Description
IQueryable<T>	source	Source query.

Returns

Type	Description
IUpdatable<T>	IUpdatable<T> query.

Type Parameters

Name	Description
T	Query record type.

AsValueInsertable<T>(ITable<T>)

Starts insert operation LINQ query definition.

Declaration

public static IValueInsertable<T> AsValueInsertable<T>(this ITable<T> source)

Parameters

Type	Name	Description
ITable<T>	source	Target table.

Returns

Type	Description
IValueInsertable<T>	Insertable source query.

Type Parameters

Name	Description
T	Target table mapping class.

CrossJoin<TOuter, TInner, TResult>(IQueryable<TOuter>, IQueryable<TInner>, Expression<Func<TOuter, TInner, TResult>>)

Defines cross join between two sub-queries or tables.

Declaration

public static IQueryable<TResult> CrossJoin<TOuter, TInner, TResult>(this IQueryable<TOuter> outer, IQueryable<TInner> inner, Expression<Func<TOuter, TInner, TResult>> resultSelector)

Parameters

Type	Name	Description
IQueryable<TOuter>	outer	Left join operand.
IQueryable<TInner>	inner	Right join operand.
Expression<Func<TOuter, TInner, TResult>>	resultSelector	A function to create a result element from two matching elements.

Returns

Type	Description
IQueryable<TResult>	Right operand.

Type Parameters

Name	Description
TOuter	Type of record for left join operand.
TInner	Type of record for right join operand.
TResult	The type of the result elements.

DatabaseName<T>(ITable<T>, Nullable<String>)

Overrides database name with new name for current query. This call will have effect only for databases that support database name in fully-qualified table name.

Supported by: Access, DB2, MySQL, PostgreSQL, SAP HANA, SQLite, Informix, SQL Server, Sybase ASE.

Requires schema name (see ): DB2, SAP HANA, PostgreSQL.

PostgreSQL supports only name of current database.

Declaration

public static ITable<T> DatabaseName<T>(this ITable<T> table, string? name)

Parameters

Type	Name	Description
ITable<T>	table	Table-like query source.
System.Nullable<System.String>	name	Name of database.

Returns

Type	Description
ITable<T>	Table-like query source with new database name.

Type Parameters

Name	Description
T	Table record mapping class.

Delete<T>(IQueryable<T>)

Executes delete operation, using source query as filter for records, that should be deleted.

Declaration

public static int Delete<T>(this IQueryable<T> source)

Parameters

Type	Name	Description
IQueryable<T>	source	Query that returns records to delete.

Returns

Type	Description
System.Int32	Number of deleted records.

Type Parameters

Name	Description
T	Mapping class for delete operation target table.

Delete<T>(IQueryable<T>, Expression<Func<T, Boolean>>)

Executes delete operation, using source query as initial filter for records, that should be deleted, and predicate expression as additional filter.

Declaration

public static int Delete<T>(this IQueryable<T> source, Expression<Func<T, bool>> predicate)

Parameters

Type	Name	Description
IQueryable<T>	source	Query that returns records to delete.
Expression<Func<T, System.Boolean>>	predicate	Filter expression, to specify what records from source should be deleted.

Returns

Type	Description
System.Int32	Number of deleted records.

Type Parameters

Name	Description
T	Mapping class for delete operation target table.

DeleteAsync<T>(IQueryable<T>, CancellationToken)

Executes delete operation asynchronously, using source query as filter for records, that should be deleted.

Declaration

public static async Task<int> DeleteAsync<T>(this IQueryable<T> source, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<T>	source	Query that returns records to delete.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of deleted records.

Type Parameters

Name	Description
T	Mapping class for delete operation target table.

DeleteAsync<T>(IQueryable<T>, Expression<Func<T, Boolean>>, CancellationToken)

Executes delete operation asynchronously, using source query as initial filter for records, that should be deleted, and predicate expression as additional filter.

Declaration

public static async Task<int> DeleteAsync<T>(this IQueryable<T> source, Expression<Func<T, bool>> predicate, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<T>	source	Query that returns records to delete.
Expression<Func<T, System.Boolean>>	predicate	Filter expression, to specify what records from source should be deleted.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of deleted records.

Type Parameters

Name	Description
T	Mapping class for delete operation target table.

DeleteWhenMatched<TTarget, TSource>(IMergeableSource<TTarget, TSource>)

Adds new delete operation to merge and returns new merge command with added operation. This operation removes record in target table for each record that was matched in source and target, if it wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TSource> DeleteWhenMatched<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

DeleteWhenMatchedAnd<TTarget, TSource>(IMergeableSource<TTarget, TSource>, Expression<Func<TTarget, TSource, Boolean>>)

Adds new delete operation to merge and returns new merge command with added operation. This operation removes record in target table for each record that was matched in source and target, if it was matched by operation predicate and wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TSource> DeleteWhenMatchedAnd<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge, Expression<Func<TTarget, TSource, bool>> searchCondition)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.
Expression<Func<TTarget, TSource, System.Boolean>>	searchCondition	Operation execution condition over target and source records.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

DeleteWhenNotMatchedBySource<TTarget, TSource>(IMergeableSource<TTarget, TSource>)

IMPORTANT: This operation supported only by Microsoft SQL Server. Adds new delete by source operation to merge and returns new merge command with added operation. This operation removes record in target table for each record that was matched only in target and wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TSource> DeleteWhenNotMatchedBySource<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

DeleteWhenNotMatchedBySourceAnd<TTarget, TSource>(IMergeableSource<TTarget, TSource>, Expression<Func<TTarget, Boolean>>)

IMPORTANT: This operation supported only by Microsoft SQL Server. Adds new delete by source operation to merge and returns new merge command with added operation. This operation removes record in target table for each record that was matched only in target and passed filtering with operation predicate, if it wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TSource> DeleteWhenNotMatchedBySourceAnd<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge, Expression<Func<TTarget, bool>> searchCondition)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.
Expression<Func<TTarget, System.Boolean>>	searchCondition	Operation execution condition over target record.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

DeleteWithOutput<TSource>(IQueryable<TSource>)

Deletes records from source query and returns deleted records.

Declaration

public static IEnumerable<TSource> DeleteWithOutput<TSource>(this IQueryable<TSource> source)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for delete operation.

Returns

Type	Description
IEnumerable<TSource>	Enumeration of records.

Type Parameters

Name	Description
TSource	Source query record type.

Remarks

Database support:

DeleteWithOutput<TSource, TOutput>(IQueryable<TSource>, Expression<Func<TSource, TOutput>>)

Deletes records from source query into target table and returns deleted records.

Declaration

public static IEnumerable<TOutput> DeleteWithOutput<TSource, TOutput>(this IQueryable<TSource> source, Expression<Func<TSource, TOutput>> outputExpression)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for delete operation.
Expression<Func<TSource, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.

Returns

Type	Description
IEnumerable<TOutput>	Enumeration of records.

Type Parameters

Name	Description
TSource	Source query record type.
TOutput	Output table record type.

Remarks

Database support:

DeleteWithOutputAsync<TSource>(IQueryable<TSource>, CancellationToken)

Deletes records from source query into target table asynchronously and returns deleted records.

Declaration

public static Task<TSource[]> DeleteWithOutputAsync<TSource>(this IQueryable<TSource> source, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for delete operation.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TSource[]>	Array of records.

Type Parameters

Name	Description
TSource	Source query record type.

Remarks

Database support:

DeleteWithOutputAsync<TSource, TOutput>(IQueryable<TSource>, Expression<Func<TSource, TOutput>>, CancellationToken)

Deletes records from source query into target table asynchronously and returns deleted records.

Declaration

public static Task<TOutput[]> DeleteWithOutputAsync<TSource, TOutput>(this IQueryable<TSource> source, Expression<Func<TSource, TOutput>> outputExpression, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for delete operation.
Expression<Func<TSource, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TOutput[]>	Array of records.

Type Parameters

Name	Description
TSource	Source query record type.
TOutput	Output table record type.

Remarks

Database support:

DeleteWithOutputInto<TSource, TOutput>(IQueryable<TSource>, ITable<TOutput>)

Deletes records from source query into target table and outputs deleted records into outputTable.

Declaration

public static int DeleteWithOutputInto<TSource, TOutput>(this IQueryable<TSource> source, ITable<TOutput> outputTable)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for delete operation.
ITable<TOutput>	outputTable	Output table.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TOutput	Output table record type.

Remarks

Database support:

DeleteWithOutputInto<TSource, TOutput>(IQueryable<TSource>, ITable<TOutput>, Expression<Func<TSource, TOutput>>)

Deletes records from source query into target table and outputs deleted records into outputTable.

Declaration

public static int DeleteWithOutputInto<TSource, TOutput>(this IQueryable<TSource> source, ITable<TOutput> outputTable, Expression<Func<TSource, TOutput>> outputExpression)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for delete operation.
ITable<TOutput>	outputTable	Output table.
Expression<Func<TSource, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TOutput	Output table record type.

Remarks

Database support:

DeleteWithOutputIntoAsync<TSource, TOutput>(IQueryable<TSource>, ITable<TOutput>, CancellationToken)

Deletes records from source query into target table asynchronously and outputs deleted records into outputTable.

Declaration

public static Task<int> DeleteWithOutputIntoAsync<TSource, TOutput>(this IQueryable<TSource> source, ITable<TOutput> outputTable, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for delete operation.
ITable<TOutput>	outputTable	Output table.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TOutput	Output table record type.

Remarks

Database support:

DeleteWithOutputIntoAsync<TSource, TOutput>(IQueryable<TSource>, ITable<TOutput>, Expression<Func<TSource, TOutput>>, CancellationToken)

Deletes records from source query into target table asynchronously and outputs deleted records into outputTable.

Declaration

public static Task<int> DeleteWithOutputIntoAsync<TSource, TOutput>(this IQueryable<TSource> source, ITable<TOutput> outputTable, Expression<Func<TSource, TOutput>> outputExpression, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for delete operation.
ITable<TOutput>	outputTable	Output table.
Expression<Func<TSource, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TOutput	Output table record type.

Remarks

Database support:

DisableGuard<TKey, TElement>(IQueryable<IGrouping<TKey, TElement>>)

Disables grouping guard for particular grouping query.

Declaration

public static IQueryable<IGrouping<TKey, TElement>> DisableGuard<TKey, TElement>(this IQueryable<IGrouping<TKey, TElement>> grouping)

Parameters

Type	Name	Description
IQueryable<IGrouping<TKey, TElement>>	grouping	Source data query.

Returns

Type	Description
IQueryable<IGrouping<TKey, TElement>>	Query with suppressed grouping guard.

Type Parameters

Name	Description
TKey	The type of the key of the .
TElement	The type of the values in the .

Drop<T>(ITable<T>, Boolean)

Drops database table.

Declaration

public static int Drop<T>(this ITable<T> target, bool throwExceptionIfNotExists = true)

Parameters

Type	Name	Description
ITable<T>	target	Dropped table.
System.Boolean	throwExceptionIfNotExists	If false, any exception during drop operation will be silently catched and 0 returned. This behavior is not correct and will be fixed in future to mask only missing table exceptions. Tracked by issue. Default value: true.

Returns

Type	Description
System.Int32	Number of affected records. Usually -1 as it is not data modification operation.

Type Parameters

Name	Description
T	Table record type.

DropAsync<T>(ITable<T>, Boolean, CancellationToken)

Drops database table asynchronously.

Declaration

public static async Task<int> DropAsync<T>(this ITable<T> target, bool throwExceptionIfNotExists = true, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<T>	target	Dropped table.
System.Boolean	throwExceptionIfNotExists	If false, any exception during drop operation will be silently catched and 0 returned. This behavior is not correct and will be fixed in future to mask only missing table exceptions. Tracked by issue. Default value: true.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records. Usually -1 as it is not data modification operation.

Type Parameters

Name	Description
T	Table record type.

ElementAt<TSource>(IQueryable<TSource>, Expression<Func<Int32>>)

Selects record at specified position from source query. If query doesn't return enough records, will be thrown.

Declaration

public static TSource ElementAt<TSource>(this IQueryable<TSource> source, Expression<Func<int>> index)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
Expression<Func<System.Int32>>	index	Expression that defines index of record to select.

Returns

Type	Description
TSource	Record at specified position.

Type Parameters

Name	Description
TSource	Source table record type.

ElementAtAsync<TSource>(IQueryable<TSource>, Expression<Func<Int32>>, CancellationToken)

Selects record at specified position from source query asynchronously. If query doesn't return enough records, will be thrown.

Declaration

public static async Task<TSource> ElementAtAsync<TSource>(this IQueryable<TSource> source, Expression<Func<int>> index, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
Expression<Func<System.Int32>>	index	Expression that defines index of record to select.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TSource>	Record at specified position.

Type Parameters

Name	Description
TSource	Source table record type.

ElementAtOrDefault<TSource>(IQueryable<TSource>, Expression<Func<Int32>>)

Selects record at specified position from source query.

Declaration

public static TSource ElementAtOrDefault<TSource>(this IQueryable<TSource> source, Expression<Func<int>> index)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
Expression<Func<System.Int32>>	index	Expression that defines index of record to select.

Returns

Type	Description
TSource	Record at specified position or default value, if source query doesn't have record with such index.

Type Parameters

Name	Description
TSource	Source table record type.

ElementAtOrDefaultAsync<TSource>(IQueryable<TSource>, Expression<Func<Int32>>, CancellationToken)

Selects record at specified position from source query asynchronously.

Declaration

public static async Task<TSource> ElementAtOrDefaultAsync<TSource>(this IQueryable<TSource> source, Expression<Func<int>> index, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
Expression<Func<System.Int32>>	index	Expression that defines index of record to select.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TSource>	Record at specified position or default value, if source query doesn't have record with such index.

Type Parameters

Name	Description
TSource	Source table record type.

ExceptAll<TSource>(IQueryable<TSource>, IEnumerable<TSource>)

Produces the set difference of two sequences.

Declaration

public static IQueryable<TSource> ExceptAll<TSource>(this IQueryable<TSource> source1, IEnumerable<TSource> source2)

Parameters

Type	Name	Description
IQueryable<TSource>	source1	An whose elements that are not also in source2 will be returned.
IEnumerable<TSource>	source2	An whose elements that also occur in the first sequence will not appear in the returned sequence.

Returns

Type	Description
IQueryable<TSource>	An that contains the set difference of the two sequences.

Type Parameters

Name	Description
TSource	The type of the elements of the input sequences.

FullJoin<TSource>(IQueryable<TSource>, Expression<Func<TSource, Boolean>>)

Defines full outer join between two sub-queries or tables.

Declaration

public static IQueryable<TSource> FullJoin<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Right join operand.
Expression<Func<TSource, System.Boolean>>	predicate	Join predicate.

Returns

Type	Description
IQueryable<TSource>	Right operand.

Type Parameters

Name	Description
TSource	Type of record for right join operand.

FullJoin<TOuter, TInner, TResult>(IQueryable<TOuter>, IQueryable<TInner>, Expression<Func<TOuter, TInner, Boolean>>, Expression<Func<TOuter, TInner, TResult>>)

Defines full outer join between two sub-queries or tables.

Declaration

public static IQueryable<TResult> FullJoin<TOuter, TInner, TResult>(this IQueryable<TOuter> outer, IQueryable<TInner> inner, Expression<Func<TOuter, TInner, bool>> predicate, Expression<Func<TOuter, TInner, TResult>> resultSelector)

Parameters

Type	Name	Description
IQueryable<TOuter>	outer	Left join operand.
IQueryable<TInner>	inner	Right join operand.
Expression<Func<TOuter, TInner, System.Boolean>>	predicate	Join predicate.
Expression<Func<TOuter, TInner, TResult>>	resultSelector	A function to create a result element from two matching elements.

Returns

Type	Description
IQueryable<TResult>	Right operand.

Type Parameters

Name	Description
TOuter	Type of record for left join operand.
TInner	Type of record for right join operand.
TResult	The type of the result elements.

GenerateTestString(IQueryable, Boolean)

Generates test source code for specified query. This method could be usefull to debug queries and attach test code to linq2db issue reports.

Declaration

public static string GenerateTestString(this IQueryable query, bool mangleNames = false)

Parameters

Type	Name	Description
IQueryable	query	Query to test.
System.Boolean	mangleNames	Should we use real names for used types, members and namespace or generate obfuscated names.

Returns

Type	Description
System.String	Test source code.

HasCreateIfNotExists(TableOptions)

Declaration

public static bool HasCreateIfNotExists(this TableOptions tableOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions

Returns

Type	Description
System.Boolean

HasDropIfExists(TableOptions)

Declaration

public static bool HasDropIfExists(this TableOptions tableOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions

Returns

Type	Description
System.Boolean

HasIsGlobalTemporaryData(TableOptions)

Declaration

public static bool HasIsGlobalTemporaryData(this TableOptions tableOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions

Returns

Type	Description
System.Boolean

HasIsGlobalTemporaryStructure(TableOptions)

Declaration

public static bool HasIsGlobalTemporaryStructure(this TableOptions tableOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions

Returns

Type	Description
System.Boolean

HasIsLocalTemporaryData(TableOptions)

Declaration

public static bool HasIsLocalTemporaryData(this TableOptions tableOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions

Returns

Type	Description
System.Boolean

HasIsLocalTemporaryStructure(TableOptions)

Declaration

public static bool HasIsLocalTemporaryStructure(this TableOptions tableOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions

Returns

Type	Description
System.Boolean

HasIsTemporary(TableOptions)

Declaration

public static bool HasIsTemporary(this TableOptions tableOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions

Returns

Type	Description
System.Boolean

HasIsTransactionTemporaryData(TableOptions)

Declaration

public static bool HasIsTransactionTemporaryData(this TableOptions tableOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions

Returns

Type	Description
System.Boolean

HasUniqueKey<TSource, TKey>(IQueryable<TSource>, Expression<Func<TSource, TKey>>)

Records unique key for IQueryable. It allows sub-query to be optimized out in LEFT JOIN if columns from sub-query are not used in final projection and predicate.

Declaration

public static IQueryable<TSource> HasUniqueKey<TSource, TKey>(this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TKey>>	keySelector	A function to specify which fields are unique.

Returns

Type	Description
IQueryable<TSource>	Query converted into sub-query.

Type Parameters

Name	Description
TSource	Source query record type.
TKey	Key type.

Having<TSource>(IQueryable<TSource>, Expression<Func<TSource, Boolean>>)

Filters source query using HAVING SQL clause. In general you don't need to use this method as linq2db is able to propely identify current context for method and generate HAVING clause. More details.

Declaration

public static IQueryable<TSource> Having<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query to filter.
Expression<Func<TSource, System.Boolean>>	predicate	Filtering expression.

Returns

Type	Description
IQueryable<TSource>	Filtered query.

Type Parameters

Name	Description
TSource	Source query record type.

IgnoreFilters<TSource>(IQueryable<TSource>, Type[])

Disables Query Filters in current query.

Declaration

public static IQueryable<TSource> IgnoreFilters<TSource>(this IQueryable<TSource> source, params Type[] entityTypes)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
Type[]	entityTypes	Optional types with which filters should be disabled.

Returns

Type	Description
IQueryable<TSource>	Query with disabled filters.

Type Parameters

Name	Description
TSource	Source query record type.

IndexHint<TSource>(ITable<TSource>, String)

Adds an index hint to a table in generated query.

Declaration

public static ITable<TSource> IndexHint<TSource>(this ITable<TSource> table, string hint)

Parameters

Type	Name	Description
ITable<TSource>	table	Table-like query source.
System.String	hint	SQL text, added as a database specific hint to generated query.

Returns

Type	Description
ITable<TSource>	Table-like query source with index hints.

Type Parameters

Name	Description
TSource	Table record mapping class.

IndexHint<TSource, TParam>(ITable<TSource>, String, TParam)

Adds an index hint to a table in generated query.

Declaration

public static ITable<TSource> IndexHint<TSource, TParam>(this ITable<TSource> table, string hint, TParam hintParameter)

Parameters

Type	Name	Description
ITable<TSource>	table	Table-like query source.
System.String	hint	SQL text, added as a database specific hint to generated query.
TParam	hintParameter	Table hint parameter.

Returns

Type	Description
ITable<TSource>	Table-like query source with index hints.

Type Parameters

Name	Description
TSource	Table record mapping class.
TParam	Table hint parameter type.

IndexHint<TSource, TParam>(ITable<TSource>, String, TParam[])

Adds an index hint to a table in generated query.

Declaration

public static ITable<TSource> IndexHint<TSource, TParam>(this ITable<TSource> table, string hint, params TParam[] hintParameters)

Parameters

Type	Name	Description
ITable<TSource>	table	Table-like query source.
System.String	hint	SQL text, added as a database specific hint to generated query.
TParam[]	hintParameters	Table hint parameters.

Returns

Type	Description
ITable<TSource>	Table-like query source with index hints.

Type Parameters

Name	Description
TSource	Table record mapping class.
TParam	Table hint parameter type.

InlineParameters<TSource>(IQueryable<TSource>)

Inline parameters in query which can be converted to SQL Literal.

Declaration

public static IQueryable<TSource> InlineParameters<TSource>(this IQueryable<TSource> source)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.

Returns

Type	Description
IQueryable<TSource>	Query with inlined parameters.

Type Parameters

Name	Description
TSource	Source query record type.

InnerJoin<TSource>(IQueryable<TSource>, Expression<Func<TSource, Boolean>>)

Defines inner join between two sub-queries or tables.

Declaration

public static IQueryable<TSource> InnerJoin<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Right join operand.
Expression<Func<TSource, System.Boolean>>	predicate	Join predicate.

Returns

Type	Description
IQueryable<TSource>	Right operand.

Type Parameters

Name	Description
TSource	Type of record for right join operand.

InnerJoin<TOuter, TInner, TResult>(IQueryable<TOuter>, IQueryable<TInner>, Expression<Func<TOuter, TInner, Boolean>>, Expression<Func<TOuter, TInner, TResult>>)

Defines inner or outer join between two sub-queries or tables.

Declaration

public static IQueryable<TResult> InnerJoin<TOuter, TInner, TResult>(this IQueryable<TOuter> outer, IQueryable<TInner> inner, Expression<Func<TOuter, TInner, bool>> predicate, Expression<Func<TOuter, TInner, TResult>> resultSelector)

Parameters

Type	Name	Description
IQueryable<TOuter>	outer	Left join operand.
IQueryable<TInner>	inner	Right join operand.
Expression<Func<TOuter, TInner, System.Boolean>>	predicate	Join predicate.
Expression<Func<TOuter, TInner, TResult>>	resultSelector	A function to create a result element from two matching elements.

Returns

Type	Description
IQueryable<TResult>	Right operand.

Type Parameters

Name	Description
TOuter	Type of record for left join operand.
TInner	Type of record for right join operand.
TResult	The type of the result elements.

Insert<T>(ITable<T>, Expression<Func<T>>)

Inserts single record into target table.

Declaration

public static int Insert<T>(this ITable<T> target, Expression<Func<T>> setter)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
T	Inserted record type.

Insert<T>(IValueInsertable<T>)

Executes insert query.

Declaration

public static int Insert<T>(this IValueInsertable<T> source)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
T	Target table record type.

Insert<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>)

Inserts records from source query into target table.

Declaration

public static int Insert<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type

Insert<TSource, TTarget>(ISelectInsertable<TSource, TTarget>)

Executes configured insert query.

Declaration

public static int Insert<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

InsertAsync<T>(ITable<T>, Expression<Func<T>>, CancellationToken)

Inserts single record into target table asynchronously.

Declaration

public static async Task<int> InsertAsync<T>(this ITable<T> target, Expression<Func<T>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
T	Inserted record type.

InsertAsync<T>(IValueInsertable<T>, CancellationToken)

Executes insert query asynchronously.

Declaration

public static async Task<int> InsertAsync<T>(this IValueInsertable<T> source, CancellationToken token = null)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
T	Target table record type.

InsertAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, CancellationToken)

Inserts records from source query into target table asynchronously.

Declaration

public static async Task<int> InsertAsync<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type

InsertAsync<TSource, TTarget>(ISelectInsertable<TSource, TTarget>, CancellationToken)

Executes configured insert query asynchronously.

Declaration

public static async Task<int> InsertAsync<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source, CancellationToken token = null)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

InsertOrUpdate<T>(ITable<T>, Expression<Func<T>>, Nullable<Expression<Func<T, T>>>)

Inserts new record into target table or updates existing record if record with the same primary key value already exists in target table. When null value or expression without field setters passed to onDuplicateKeyUpdateSetter, this method implements INSERT IF NOT EXISTS logic.

Declaration

public static int InsertOrUpdate<T>(this ITable<T> target, Expression<Func<T>> insertSetter, Expression<Func<T, T>>? onDuplicateKeyUpdateSetter)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	insertSetter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
System.Nullable<Expression<Func<T, T>>>	onDuplicateKeyUpdateSetter	Updated record constructor expression. Expression supports only target table record new expression with field initializers. Accepts updated record as parameter.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
T	Table record type.

InsertOrUpdate<T>(ITable<T>, Expression<Func<T>>, Nullable<Expression<Func<T, T>>>, Expression<Func<T>>)

Inserts new record into target table or updates existing record if record with the same key value already exists in target table. When null value or expression without field setters passed to onDuplicateKeyUpdateSetter, this method implements INSERT IF NOT EXISTS logic.

Declaration

public static int InsertOrUpdate<T>(this ITable<T> target, Expression<Func<T>> insertSetter, Expression<Func<T, T>>? onDuplicateKeyUpdateSetter, Expression<Func<T>> keySelector)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	insertSetter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
System.Nullable<Expression<Func<T, T>>>	onDuplicateKeyUpdateSetter	Updated record constructor expression. Expression supports only target table record new expression with field initializers. Accepts updated record as parameter.
Expression<Func<T>>	keySelector	Key fields selector to specify what fields and values must be used as key fields for selection between insert and update operations. Expression supports only target table record new expression with field initializers for each key field. Assigned key field value will be used as key value by operation type selector.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
T	Table record type.

InsertOrUpdateAsync<T>(ITable<T>, Expression<Func<T>>, Nullable<Expression<Func<T, T>>>, CancellationToken)

Asynchronously inserts new record into target table or updates existing record if record with the same primary key value already exists in target table. When null value or expression without field setters passed to onDuplicateKeyUpdateSetter, this method implements INSERT IF NOT EXISTS logic.

Declaration

public static async Task<int> InsertOrUpdateAsync<T>(this ITable<T> target, Expression<Func<T>> insertSetter, Expression<Func<T, T>>? onDuplicateKeyUpdateSetter, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	insertSetter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
System.Nullable<Expression<Func<T, T>>>	onDuplicateKeyUpdateSetter	Updated record constructor expression. Expression supports only target table record new expression with field initializers. Accepts updated record as parameter.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
T	Table record type.

InsertOrUpdateAsync<T>(ITable<T>, Expression<Func<T>>, Nullable<Expression<Func<T, T>>>, Expression<Func<T>>, CancellationToken)

Asynchronously inserts new record into target table or updates existing record if record with the same key value already exists in target table. When null value or expression without field setters passed to onDuplicateKeyUpdateSetter, this method implements INSERT IF NOT EXISTS logic.

Declaration

public static async Task<int> InsertOrUpdateAsync<T>(this ITable<T> target, Expression<Func<T>> insertSetter, Expression<Func<T, T>>? onDuplicateKeyUpdateSetter, Expression<Func<T>> keySelector, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	insertSetter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
System.Nullable<Expression<Func<T, T>>>	onDuplicateKeyUpdateSetter	Updated record constructor expression. Expression supports only target table record new expression with field initializers. Accepts updated record as parameter.
Expression<Func<T>>	keySelector	Key fields selector to specify what fields and values must be used as key fields for selection between insert and update operations. Expression supports only target table record new expression with field initializers for each key field. Assigned key field value will be used as key value by operation type selector.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
T	Table record type.

InsertWhenNotMatched<TTarget>(IMergeableSource<TTarget, TTarget>)

Adds new insert operation to merge and returns new merge command with added operation. This operation inserts new record to target table using data from the same fields of source record for each new record from source, not processed by previous operations.

Declaration

public static IMergeable<TTarget, TTarget> InsertWhenNotMatched<TTarget>(this IMergeableSource<TTarget, TTarget> merge)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TTarget>	merge	Merge command builder interface.

Returns

Type	Description
IMergeable<TTarget, TTarget>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target and source records type.

InsertWhenNotMatched<TTarget, TSource>(IMergeableSource<TTarget, TSource>, Expression<Func<TSource, TTarget>>)

Adds new insert operation to merge and returns new merge command with added operation. This operation inserts new record to target table using user-defined values for target columns for each new record from source, not processed by previous operations.

Declaration

public static IMergeable<TTarget, TSource> InsertWhenNotMatched<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.
Expression<Func<TSource, TTarget>>	setter	Create record expression using source record. Expression should be a call to target record constructor with field/properties initializers to be recognized by API.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

InsertWhenNotMatchedAnd<TTarget>(IMergeableSource<TTarget, TTarget>, Expression<Func<TTarget, Boolean>>)

Adds new insert operation to merge and returns new merge command with added operation. This operation inserts new record to target table using data from the same fields of source record for each new record from source that passes filtering with specified predicate, if it wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TTarget> InsertWhenNotMatchedAnd<TTarget>(this IMergeableSource<TTarget, TTarget> merge, Expression<Func<TTarget, bool>> searchCondition)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TTarget>	merge	Merge command builder interface.
Expression<Func<TTarget, System.Boolean>>	searchCondition	Operation execution condition over source record.

Returns

Type	Description
IMergeable<TTarget, TTarget>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target and source records type.

InsertWhenNotMatchedAnd<TTarget, TSource>(IMergeableSource<TTarget, TSource>, Expression<Func<TSource, Boolean>>, Expression<Func<TSource, TTarget>>)

Adds new insert operation to merge and returns new merge command with added operation. This operation inserts new record to target table using user-defined values for target columns for each new record from source that passes filtering with specified predicate, if it wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TSource> InsertWhenNotMatchedAnd<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge, Expression<Func<TSource, bool>> searchCondition, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.
Expression<Func<TSource, System.Boolean>>	searchCondition	Operation execution condition over source record.
Expression<Func<TSource, TTarget>>	setter	Create record expression using source record. Expression should be a call to target record constructor with field/properties initializers to be recognized by API.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

InsertWithDecimalIdentity<T>(ITable<T>, Expression<Func<T>>)

Inserts single record into target table and returns identity value of inserted record as value.

Declaration

public static decimal InsertWithDecimalIdentity<T>(this ITable<T> target, Expression<Func<T>> setter)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Decimal	Inserted record's identity value.

Type Parameters

Name	Description
T	Inserted record type.

InsertWithDecimalIdentity<T>(IValueInsertable<T>)

Executes insert query and returns identity value of inserted record as value.

Declaration

public static decimal? InsertWithDecimalIdentity<T>(this IValueInsertable<T> source)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.

Returns

Type	Description
System.Nullable<System.Decimal>	Inserted record's identity value.

Type Parameters

Name	Description
T	Target table record type.

InsertWithDecimalIdentity<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>)

Inserts records from source query into target table and returns identity value of last inserted record as value.

Declaration

public static decimal? InsertWithDecimalIdentity<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Nullable<System.Decimal>	Last inserted record's identity value.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type

InsertWithDecimalIdentity<TSource, TTarget>(ISelectInsertable<TSource, TTarget>)

Executes configured insert query and returns identity value of last inserted record as value.

Declaration

public static decimal? InsertWithDecimalIdentity<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.

Returns

Type	Description
System.Nullable<System.Decimal>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

InsertWithDecimalIdentityAsync<T>(ITable<T>, Expression<Func<T>>, CancellationToken)

Inserts single record into target table asynchronously and returns identity value of inserted record as value.

Declaration

public static async Task<decimal> InsertWithDecimalIdentityAsync<T>(this ITable<T> target, Expression<Func<T>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Decimal>	Inserted record's identity value.

Type Parameters

Name	Description
T	Inserted record type.

InsertWithDecimalIdentityAsync<T>(IValueInsertable<T>, CancellationToken)

Executes insert query asynchronously and returns identity value of inserted record as value.

Declaration

public static async Task<decimal?> InsertWithDecimalIdentityAsync<T>(this IValueInsertable<T> source, CancellationToken token = null)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Nullable<System.Decimal>>	Inserted record's identity value.

Type Parameters

Name	Description
T	Target table record type.

InsertWithDecimalIdentityAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, CancellationToken)

Inserts records from source query into target table asynchronously and returns identity value of last inserted record as value.

Declaration

public static async Task<decimal?> InsertWithDecimalIdentityAsync<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Nullable<System.Decimal>>	Last inserted record's identity value.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type

InsertWithDecimalIdentityAsync<TSource, TTarget>(ISelectInsertable<TSource, TTarget>, CancellationToken)

Executes configured insert query asynchronously and returns identity value of last inserted record as value.

Declaration

public static async Task<decimal?> InsertWithDecimalIdentityAsync<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source, CancellationToken token = null)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Nullable<System.Decimal>>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

InsertWithIdentity<T>(ITable<T>, Expression<Func<T>>)

Inserts single record into target table and returns identity value of inserted record.

Declaration

public static object InsertWithIdentity<T>(this ITable<T> target, Expression<Func<T>> setter)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Object	Inserted record's identity value.

Type Parameters

Name	Description
T	Inserted record type.

InsertWithIdentity<T>(IValueInsertable<T>)

Executes insert query and returns identity value of inserted record.

Declaration

public static object InsertWithIdentity<T>(this IValueInsertable<T> source)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.

Returns

Type	Description
System.Object	Inserted record's identity value.

Type Parameters

Name	Description
T	Target table record type.

InsertWithIdentity<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>)

Inserts records from source query into target table and returns identity value of last inserted record.

Declaration

public static object InsertWithIdentity<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Object	Last inserted record's identity value.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type

InsertWithIdentity<TSource, TTarget>(ISelectInsertable<TSource, TTarget>)

Executes configured insert query and returns identity value of last inserted record.

Declaration

public static object InsertWithIdentity<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.

Returns

Type	Description
System.Object	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

InsertWithIdentityAsync<T>(ITable<T>, Expression<Func<T>>, CancellationToken)

Inserts single record into target table asynchronously and returns identity value of inserted record.

Declaration

public static async Task<object> InsertWithIdentityAsync<T>(this ITable<T> target, Expression<Func<T>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Object>	Inserted record's identity value.

Type Parameters

Name	Description
T	Inserted record type.

InsertWithIdentityAsync<T>(IValueInsertable<T>, CancellationToken)

Executes insert query asynchronously and returns identity value of inserted record.

Declaration

public static async Task<object> InsertWithIdentityAsync<T>(this IValueInsertable<T> source, CancellationToken token = null)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Object>	Inserted record's identity value.

Type Parameters

Name	Description
T	Target table record type.

InsertWithIdentityAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, CancellationToken)

Inserts records from source query into target table asynchronously and returns identity value of last inserted record.

Declaration

public static async Task<object> InsertWithIdentityAsync<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Object>	Last inserted record's identity value.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type

InsertWithIdentityAsync<TSource, TTarget>(ISelectInsertable<TSource, TTarget>, CancellationToken)

Executes configured insert query asynchronously and returns identity value of last inserted record.

Declaration

public static async Task<object> InsertWithIdentityAsync<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source, CancellationToken token = null)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Object>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

InsertWithInt32Identity<T>(ITable<T>, Expression<Func<T>>)

Inserts single record into target table and returns identity value of inserted record as value.

Declaration

public static int InsertWithInt32Identity<T>(this ITable<T> target, Expression<Func<T>> setter)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Int32	Inserted record's identity value.

Type Parameters

Name	Description
T	Inserted record type.

InsertWithInt32Identity<T>(IValueInsertable<T>)

Executes insert query and returns identity value of inserted record as value.

Declaration

public static int? InsertWithInt32Identity<T>(this IValueInsertable<T> source)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.

Returns

Type	Description
System.Nullable<System.Int32>	Inserted record's identity value.

Type Parameters

Name	Description
T	Target table record type.

InsertWithInt32Identity<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>)

Inserts records from source query into target table and returns identity value of last inserted record as value.

Declaration

public static int? InsertWithInt32Identity<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Nullable<System.Int32>	Last inserted record's identity value.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type

InsertWithInt32Identity<TSource, TTarget>(ISelectInsertable<TSource, TTarget>)

Executes configured insert query and returns identity value of last inserted record as value.

Declaration

public static int? InsertWithInt32Identity<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.

Returns

Type	Description
System.Nullable<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

InsertWithInt32IdentityAsync<T>(ITable<T>, Expression<Func<T>>, CancellationToken)

Inserts single record into target table asynchronously and returns identity value of inserted record as value.

Declaration

public static async Task<int> InsertWithInt32IdentityAsync<T>(this ITable<T> target, Expression<Func<T>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Inserted record's identity value.

Type Parameters

Name	Description
T	Inserted record type.

InsertWithInt32IdentityAsync<T>(IValueInsertable<T>, CancellationToken)

Executes insert query asynchronously and returns identity value of inserted record as value.

Declaration

public static async Task<int?> InsertWithInt32IdentityAsync<T>(this IValueInsertable<T> source, CancellationToken token = null)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Nullable<System.Int32>>	Inserted record's identity value.

Type Parameters

Name	Description
T	Target table record type.

InsertWithInt32IdentityAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, CancellationToken)

Inserts records from source query into target table asynchronously and returns identity value of last inserted record as value.

Declaration

public static async Task<int?> InsertWithInt32IdentityAsync<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Nullable<System.Int32>>	Last inserted record's identity value.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type

InsertWithInt32IdentityAsync<TSource, TTarget>(ISelectInsertable<TSource, TTarget>, CancellationToken)

Executes configured insert query asynchronously and returns identity value of last inserted record as value.

Declaration

public static async Task<int?> InsertWithInt32IdentityAsync<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source, CancellationToken token = null)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Nullable<System.Int32>>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

InsertWithInt64Identity<T>(ITable<T>, Expression<Func<T>>)

Inserts single record into target table and returns identity value of inserted record as value.

Declaration

public static long InsertWithInt64Identity<T>(this ITable<T> target, Expression<Func<T>> setter)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Int64	Inserted record's identity value.

Type Parameters

Name	Description
T	Inserted record type.

InsertWithInt64Identity<T>(IValueInsertable<T>)

Executes insert query and returns identity value of inserted record as value.

Declaration

public static long? InsertWithInt64Identity<T>(this IValueInsertable<T> source)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.

Returns

Type	Description
System.Nullable<System.Int64>	Inserted record's identity value.

Type Parameters

Name	Description
T	Target table record type.

InsertWithInt64Identity<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>)

Inserts records from source query into target table and returns identity value of last inserted record as value.

Declaration

public static long? InsertWithInt64Identity<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Nullable<System.Int64>	Last inserted record's identity value.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type

InsertWithInt64Identity<TSource, TTarget>(ISelectInsertable<TSource, TTarget>)

Executes configured insert query and returns identity value of last inserted record as value.

Declaration

public static long? InsertWithInt64Identity<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.

Returns

Type	Description
System.Nullable<System.Int64>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

InsertWithInt64IdentityAsync<T>(ITable<T>, Expression<Func<T>>, CancellationToken)

Inserts single record into target table asynchronously and returns identity value of inserted record as value.

Declaration

public static async Task<long> InsertWithInt64IdentityAsync<T>(this ITable<T> target, Expression<Func<T>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<T>	target	Target table.
Expression<Func<T>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int64>	Inserted record's identity value.

Type Parameters

Name	Description
T	Inserted record type.

InsertWithInt64IdentityAsync<T>(IValueInsertable<T>, CancellationToken)

Executes insert query asynchronously and returns identity value of inserted record as value.

Declaration

public static async Task<long?> InsertWithInt64IdentityAsync<T>(this IValueInsertable<T> source, CancellationToken token = null)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Nullable<System.Int64>>	Inserted record's identity value.

Type Parameters

Name	Description
T	Target table record type.

InsertWithInt64IdentityAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, CancellationToken)

Inserts records from source query into target table asynchronously and returns identity value of last inserted record as value.

Declaration

public static async Task<long?> InsertWithInt64IdentityAsync<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Nullable<System.Int64>>	Last inserted record's identity value.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type

InsertWithInt64IdentityAsync<TSource, TTarget>(ISelectInsertable<TSource, TTarget>, CancellationToken)

Executes configured insert query asynchronously and returns identity value of last inserted record as value.

Declaration

public static async Task<long?> InsertWithInt64IdentityAsync<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source, CancellationToken token = null)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Nullable<System.Int64>>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

InsertWithOutput<TTarget>(ITable<TTarget>, TTarget)

Inserts single record into target table and returns inserted record.

Declaration

public static TTarget InsertWithOutput<TTarget>(this ITable<TTarget> target, TTarget obj)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
TTarget	obj	Object with data to insert.

Returns

Type	Description
TTarget	Inserted record.

Type Parameters

Name	Description
TTarget	Inserted record type.

Remarks

Database support:

InsertWithOutput<TTarget>(ITable<TTarget>, Expression<Func<TTarget>>)

Inserts single record into target table and returns inserted record.

Declaration

public static TTarget InsertWithOutput<TTarget>(this ITable<TTarget> target, Expression<Func<TTarget>> setter)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
Expression<Func<TTarget>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
TTarget	Inserted record.

Type Parameters

Name	Description
TTarget	Inserted record type.

Remarks

Database support:

InsertWithOutput<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>)

Inserts records from source query into target table and returns newly created records.

Declaration

public static IEnumerable<TTarget> InsertWithOutput<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
IEnumerable<TTarget>	Enumeration of records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

Remarks

Database support:

InsertWithOutput<TTarget, TOutput>(ITable<TTarget>, Expression<Func<TTarget>>, Expression<Func<TTarget, TOutput>>)

Inserts single record into target table and returns inserted record.

Declaration

public static TOutput InsertWithOutput<TTarget, TOutput>(this ITable<TTarget> target, Expression<Func<TTarget>> setter, Expression<Func<TTarget, TOutput>> outputExpression)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
Expression<Func<TTarget>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
Expression<Func<TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.

Returns

Type	Description
TOutput	Inserted record.

Type Parameters

Name	Description
TTarget	Inserted record type.
TOutput	Output table record type.

Remarks

Database support:

InsertWithOutput<TSource, TTarget>(ISelectInsertable<TSource, TTarget>)

Executes configured insert query and returns inserted record.

Declaration

public static TTarget InsertWithOutput<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.

Returns

Type	Description
TTarget	Inserted record.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

Remarks

Database support:

InsertWithOutput<TSource, TTarget, TOutput>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, Expression<Func<TTarget, TOutput>>)

Inserts records from source query into target table and returns newly created records.

Declaration

public static IEnumerable<TOutput> InsertWithOutput<TSource, TTarget, TOutput>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, Expression<Func<TTarget, TOutput>> outputExpression)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
Expression<Func<TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.

Returns

Type	Description
IEnumerable<TOutput>	Enumeration of records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.
TOutput	Output table record type.

Remarks

Database support:

InsertWithOutputAsync<TTarget>(ITable<TTarget>, TTarget, CancellationToken)

Inserts single record into target table asynchronously and returns inserted record.

Declaration

public static Task<TTarget> InsertWithOutputAsync<TTarget>(this ITable<TTarget> target, TTarget obj, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
TTarget	obj	Object with data to insert.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TTarget>	Inserted record.

Type Parameters

Name	Description
TTarget	Inserted record type.

Remarks

Database support:

InsertWithOutputAsync<TTarget>(ITable<TTarget>, Expression<Func<TTarget>>, CancellationToken)

Inserts single record into target table asynchronously and returns inserted record.

Declaration

public static Task<TTarget> InsertWithOutputAsync<TTarget>(this ITable<TTarget> target, Expression<Func<TTarget>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
Expression<Func<TTarget>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TTarget>	Inserted record.

Type Parameters

Name	Description
TTarget	Inserted record type.

Remarks

Database support:

InsertWithOutputAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, CancellationToken)

Inserts records from source query into target table asynchronously and returns newly created records.

Declaration

public static Task<TTarget[]> InsertWithOutputAsync<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TTarget[]>	Array of records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

Remarks

Database support:

InsertWithOutputAsync<TTarget, TOutput>(ITable<TTarget>, Expression<Func<TTarget>>, Expression<Func<TTarget, TOutput>>, CancellationToken)

Inserts single record into target table asynchronously and returns inserted record.

Declaration

public static Task<TOutput> InsertWithOutputAsync<TTarget, TOutput>(this ITable<TTarget> target, Expression<Func<TTarget>> setter, Expression<Func<TTarget, TOutput>> outputExpression, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
Expression<Func<TTarget>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
Expression<Func<TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TOutput>	Inserted record.

Type Parameters

Name	Description
TTarget	Inserted record type.
TOutput	Output table record type.

Remarks

Database support:

InsertWithOutputAsync<TSource, TTarget>(ISelectInsertable<TSource, TTarget>, CancellationToken)

Executes configured insert query asynchronously and returns inserted record.

Declaration

public static Task<TTarget> InsertWithOutputAsync<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source, CancellationToken token = null)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TTarget>	Inserted record.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

Remarks

Database support:

InsertWithOutputAsync<TSource, TTarget, TOutput>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, Expression<Func<TTarget, TOutput>>, CancellationToken)

Inserts records from source query into target table asynchronously and returns newly created records.

Declaration

public static Task<TOutput[]> InsertWithOutputAsync<TSource, TTarget, TOutput>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, Expression<Func<TTarget, TOutput>> outputExpression, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
Expression<Func<TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TOutput[]>	Array of records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.
TOutput	Output table record type.

Remarks

Database support:

InsertWithOutputInto<TTarget>(ITable<TTarget>, Expression<Func<TTarget>>, ITable<TTarget>)

Inserts single record into target table and outputs that record into outputTable.

Declaration

public static int InsertWithOutputInto<TTarget>(this ITable<TTarget> target, Expression<Func<TTarget>> setter, ITable<TTarget> outputTable)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
Expression<Func<TTarget>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
ITable<TTarget>	outputTable	Output table.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TTarget	Inserted record type.

Remarks

Database support:

InsertWithOutputInto<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, ITable<TTarget>)

Inserts records from source query into target table and outputs newly created records into outputTable.

Declaration

public static int InsertWithOutputInto<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, ITable<TTarget> outputTable)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
ITable<TTarget>	outputTable	Output table.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

Remarks

Database support:

InsertWithOutputInto<TTarget, TOutput>(ITable<TTarget>, Expression<Func<TTarget>>, ITable<TOutput>, Expression<Func<TTarget, TOutput>>)

Inserts single record into target table and outputs that record into outputTable.

Declaration

public static int InsertWithOutputInto<TTarget, TOutput>(this ITable<TTarget> target, Expression<Func<TTarget>> setter, ITable<TOutput> outputTable, Expression<Func<TTarget, TOutput>> outputExpression)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
Expression<Func<TTarget>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
ITable<TOutput>	outputTable	Output table.
Expression<Func<TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TTarget	Inserted record type.
TOutput	Output table record type.

Remarks

Database support:

InsertWithOutputInto<TSource, TTarget>(ISelectInsertable<TSource, TTarget>, ITable<TTarget>)

Executes configured insert query and returns inserted record.

Declaration

public static int InsertWithOutputInto<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source, ITable<TTarget> outputTable)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
ITable<TTarget>	outputTable	Output table.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

Remarks

Database support:

InsertWithOutputInto<TSource, TTarget, TOutput>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, ITable<TOutput>, Expression<Func<TTarget, TOutput>>)

Inserts records from source query into target table and outputs inserted records into outputTable.

Declaration

public static int InsertWithOutputInto<TSource, TTarget, TOutput>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, ITable<TOutput> outputTable, Expression<Func<TTarget, TOutput>> outputExpression)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
ITable<TOutput>	outputTable	Output table.
Expression<Func<TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.
TOutput	Output table record type.

Remarks

Database support:

InsertWithOutputIntoAsync<TTarget>(ITable<TTarget>, Expression<Func<TTarget>>, ITable<TTarget>, CancellationToken)

Inserts single record into target table asynchronously and outputs that record into outputTable.

Declaration

public static Task<int> InsertWithOutputIntoAsync<TTarget>(this ITable<TTarget> target, Expression<Func<TTarget>> setter, ITable<TTarget> outputTable, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
Expression<Func<TTarget>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
ITable<TTarget>	outputTable	Output table.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TTarget	Inserted record type.

Remarks

Database support:

InsertWithOutputIntoAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, ITable<TTarget>, CancellationToken)

Inserts records from source query into target table asynchronously and outputs inserted records into outputTable.

Declaration

public static Task<int> InsertWithOutputIntoAsync<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, ITable<TTarget> outputTable, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
ITable<TTarget>	outputTable	Output table.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

Remarks

Database support:

InsertWithOutputIntoAsync<TTarget, TOutput>(ITable<TTarget>, Expression<Func<TTarget>>, ITable<TOutput>, Expression<Func<TTarget, TOutput>>, CancellationToken)

Inserts single record into target table asynchronously and outputs that record into outputTable.

Declaration

public static Task<int> InsertWithOutputIntoAsync<TTarget, TOutput>(this ITable<TTarget> target, Expression<Func<TTarget>> setter, ITable<TOutput> outputTable, Expression<Func<TTarget, TOutput>> outputExpression, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
Expression<Func<TTarget>>	setter	Insert expression. Expression supports only target table record new expression with field initializers.
ITable<TOutput>	outputTable	Output table.
Expression<Func<TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TTarget	Inserted record type.
TOutput	Output table record type.

Remarks

Database support:

InsertWithOutputIntoAsync<TSource, TTarget>(ISelectInsertable<TSource, TTarget>, ITable<TTarget>, CancellationToken)

Executes configured insert query asynchronously and returns inserted record.

Declaration

public static Task<int> InsertWithOutputIntoAsync<TSource, TTarget>(this ISelectInsertable<TSource, TTarget> source, ITable<TTarget> outputTable, CancellationToken token = null)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
ITable<TTarget>	outputTable	Output table.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.

Remarks

Database support:

InsertWithOutputIntoAsync<TSource, TTarget, TOutput>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, ITable<TOutput>, Expression<Func<TTarget, TOutput>>, CancellationToken)

Inserts records from source query into target table asynchronously and outputs inserted records into outputTable.

Declaration

public static Task<int> InsertWithOutputIntoAsync<TSource, TTarget, TOutput>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, ITable<TOutput> outputTable, Expression<Func<TTarget, TOutput>> outputExpression, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query, that returns data for insert operation.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Inserted record constructor expression. Expression supports only target table record new expression with field initializers.
ITable<TOutput>	outputTable	Output table.
Expression<Func<TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table record type.
TOutput	Output table record type.

Remarks

Database support:

IntersectAll<TSource>(IQueryable<TSource>, IEnumerable<TSource>)

Produces the set intersection of two sequences.

Declaration

public static IQueryable<TSource> IntersectAll<TSource>(this IQueryable<TSource> source1, IEnumerable<TSource> source2)

Parameters

Type	Name	Description
IQueryable<TSource>	source1	A sequence whose elements that also appear in source2 are returned.
IEnumerable<TSource>	source2	A sequence whose elements that also appear in the first sequence are returned.

Returns

Type	Description
IQueryable<TSource>	A sequence that contains the set intersection of the two sequences.

Type Parameters

Name	Description
TSource	The type of the elements of the input sequences.

Into<T>(IDataContext, ITable<T>)

Starts insert operation LINQ query definition.

Declaration

public static IValueInsertable<T> Into<T>(this IDataContext dataContext, ITable<T> target)

Parameters

Type	Name	Description
IDataContext	dataContext	Database connection context.
ITable<T>	target	Target table.

Returns

Type	Description
IValueInsertable<T>	Insertable source query.

Type Parameters

Name	Description
T	Target table mapping class.

Into<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>)

Converts LINQ query into insert query with source query data as data to insert.

Declaration

public static ISelectInsertable<TSource, TTarget> Into<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.

Returns

Type	Description
ISelectInsertable<TSource, TTarget>	Insertable source query.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

IsSet(TableOptions)

Declaration

public static bool IsSet(this TableOptions tableOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions

Returns

Type	Description
System.Boolean

IsTemporaryOptionSet(TableOptions)

Declaration

public static bool IsTemporaryOptionSet(this TableOptions tableOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions

Returns

Type	Description
System.Boolean

Join<TSource>(IQueryable<TSource>, SqlJoinType, Expression<Func<TSource, Boolean>>)

Defines inner or outer join between two sub-queries or tables.

Declaration

public static IQueryable<TSource> Join<TSource>(this IQueryable<TSource> source, SqlJoinType joinType, Expression<Func<TSource, bool>> predicate)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Right join operand.
SqlJoinType	joinType	Type of join.
Expression<Func<TSource, System.Boolean>>	predicate	Join predicate.

Returns

Type	Description
IQueryable<TSource>	Right operand.

Type Parameters

Name	Description
TSource	Type of record for right join operand.

Join<TOuter, TInner, TResult>(IQueryable<TOuter>, IQueryable<TInner>, SqlJoinType, Expression<Func<TOuter, TInner, Boolean>>, Expression<Func<TOuter, TInner, TResult>>)

Defines inner or outer join between two sub-queries or tables.

Declaration

public static IQueryable<TResult> Join<TOuter, TInner, TResult>(this IQueryable<TOuter> outer, IQueryable<TInner> inner, SqlJoinType joinType, Expression<Func<TOuter, TInner, bool>> predicate, Expression<Func<TOuter, TInner, TResult>> resultSelector)

Parameters

Type	Name	Description
IQueryable<TOuter>	outer	Left join operand.
IQueryable<TInner>	inner	Right join operand.
SqlJoinType	joinType	Type of join.
Expression<Func<TOuter, TInner, System.Boolean>>	predicate	Join predicate.
Expression<Func<TOuter, TInner, TResult>>	resultSelector	A function to create a result element from two matching elements.

Returns

Type	Description
IQueryable<TResult>	Right operand.

Type Parameters

Name	Description
TOuter	Type of record for left join operand.
TInner	Type of record for right join operand.
TResult	The type of the result elements.

JoinHint<TSource>(IQueryable<TSource>, String)

Adds a join hint to a generated query.

Declaration

public static IQueryable<TSource> JoinHint<TSource>(this IQueryable<TSource> source, string hint)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Query source.
System.String	hint	SQL text, added as a database specific hint to generated query.

Returns

Type	Description
IQueryable<TSource>	Query source with join hints.

Type Parameters

Name	Description
TSource	Table record mapping class.

LeftJoin<TSource>(IQueryable<TSource>, Expression<Func<TSource, Boolean>>)

Defines left outer join between two sub-queries or tables.

Declaration

public static IQueryable<TSource> LeftJoin<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Right join operand.
Expression<Func<TSource, System.Boolean>>	predicate	Join predicate.

Returns

Type	Description
IQueryable<TSource>	Right operand.

Type Parameters

Name	Description
TSource	Type of record for right join operand.

LeftJoin<TOuter, TInner, TResult>(IQueryable<TOuter>, IQueryable<TInner>, Expression<Func<TOuter, TInner, Boolean>>, Expression<Func<TOuter, TInner, TResult>>)

Defines left outer join between two sub-queries or tables.

Declaration

public static IQueryable<TResult> LeftJoin<TOuter, TInner, TResult>(this IQueryable<TOuter> outer, IQueryable<TInner> inner, Expression<Func<TOuter, TInner, bool>> predicate, Expression<Func<TOuter, TInner, TResult>> resultSelector)

Parameters

Type	Name	Description
IQueryable<TOuter>	outer	Left join operand.
IQueryable<TInner>	inner	Right join operand.
Expression<Func<TOuter, TInner, System.Boolean>>	predicate	Join predicate.
Expression<Func<TOuter, TInner, TResult>>	resultSelector	A function to create a result element from two matching elements.

Returns

Type	Description
IQueryable<TResult>	Right operand.

Type Parameters

Name	Description
TOuter	Type of record for left join operand.
TInner	Type of record for right join operand.
TResult	The type of the result elements.

LoadWith<TEntity, TProperty>(IQueryable<TEntity>, Expression<Func<TEntity, TProperty>>)

Specifies associations that should be loaded for each loaded record from current table. All associations, specified in selector expression, will be loaded. Take into account that use of this method could require multiple queries to load all requested associations.

Declaration

public static ILoadWithQueryable<TEntity, TProperty> LoadWith<TEntity, TProperty>(this IQueryable<TEntity> source, Expression<Func<TEntity, TProperty>> selector)
    where TEntity : class

Parameters

Type	Name	Description
IQueryable<TEntity>	source	The source query.
Expression<Func<TEntity, TProperty>>	selector	A lambda expression representing navigation property to be included (t => t.Property1).

Returns

Type	Description
ILoadWithQueryable<TEntity, TProperty>	Returns new query with related data included.

Type Parameters

Name	Description
TEntity	Type of entity being queried.
TProperty	Type of the related entity to be included.

Examples

Following query loads records from Table1 with Reference association, loaded for each Table1 record.

    db.Table1.LoadWith(r => r.Reference);

Following queries loads records from Table1 with Reference1 association and then loads records from Reference2 association for each loaded Reference1 record.

    db.Table1.LoadWith(r => r.Reference1.Reference2);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.Reference1).ThenLoad(r => r.Reference2);

Following query loads records from Table1 with References collection association loaded for each Table1 record.

    db.Table1.LoadWith(r => r.References);

Following query loads records from Table1 with References collection association loaded for each Table1 record. Also it limits loaded records.

    db.Table1.LoadWith(r => r.References.Where(e => !e.IsDeleted).Take(10));

Following query loads records from Table1 with: - Reference1 collection association loaded for each Table1 record; - Reference2 collection association for each loaded Reference1 record; - Reference3 association for each loaded Reference2 record.

Note that a way you access collection association record (by index, using First() method) doesn't affect query results and always select all records.

    db.Table1.LoadWith(r => r.References1[0].References2.First().Reference3);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r => r.References2).ThenLoad(r => r.Reference3);

LoadWith<TEntity, TProperty>(IQueryable<TEntity>, Expression<Func<TEntity, TProperty>>, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>)

Specifies associations that should be loaded for each loaded record from current table. All associations, specified in selector expression, will be loaded. Take into account that use of this method could require multiple queries to load all requested associations. loadFunc parameter could be used to define additional association loading logic like filters or loading of more associations.

Declaration

public static ILoadWithQueryable<TEntity, TProperty> LoadWith<TEntity, TProperty>(this IQueryable<TEntity> source, Expression<Func<TEntity, TProperty>> selector, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>> loadFunc)
    where TEntity : class

Parameters

Type	Name	Description
IQueryable<TEntity>	source	The source query.
Expression<Func<TEntity, TProperty>>	selector	A lambda expression representing navigation property to be included (t => t.Property1).
Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>	loadFunc	Defines additional logic for association load query.

Returns

Type	Description
ILoadWithQueryable<TEntity, TProperty>	Returns new query with related data included.

Type Parameters

Name	Description
TEntity	Type of entity being queried.
TProperty	Type of the related entity to be included.

Examples

Following query loads records from Table1 with Reference association, loaded for each Table1 record.

    db.Table1.LoadWith(r => r.Reference);

Following queries loads records from Table1 with Reference1 association and then loads records from Reference2 association for each loaded Reference1 record.

    db.Table1.LoadWith(r => r.Reference1.Reference2);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.Reference1).ThenLoad(r => r.Reference2);

Following query loads records from Table1 with References collection association loaded for each Table1 record.

    db.Table1.LoadWith(r => r.References);

Following query loads records from Table1 with: - Reference1 collection association loaded for each Table1 record; - Reference2 collection association for each loaded Reference1 record; - Reference3 association for each loaded Reference2 record.

Note that a way you access collection association record (by index, using First() method) doesn't affect query results and always select all records.

    db.Table1.LoadWith(r => r.References1[0].References2.First().Reference3);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r => r.References2).ThenLoad(r => r.Reference3);

Following query loads records from Table1 with References collection association loaded for each Table1 record, where References record contains only records without "exclude" text in Name property.

    db.Table1.LoadWith(r => r.References, r => r.Where(rr => !rr.Name.Contains("exclude")));

Following query loads records from Table1 with References1 collection association loaded for each Table1 record, where References1 record also load Reference2 association.

    db.Table1.LoadWith(r => r.References1, r => r.LoadWith(rr => rr.Reference2));

LoadWith<TEntity, TProperty>(IQueryable<TEntity>, Expression<Func<TEntity, IEnumerable<TProperty>>>, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>)

Specifies associations that should be loaded for each loaded record from current table. All associations, specified in selector expression, will be loaded. Take into account that use of this method could require multiple queries to load all requested associations. loadFunc parameter could be used to define additional association loading logic like filters or loading of more associations.

Declaration

public static ILoadWithQueryable<TEntity, TProperty> LoadWith<TEntity, TProperty>(this IQueryable<TEntity> source, Expression<Func<TEntity, IEnumerable<TProperty>>> selector, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>> loadFunc)
    where TEntity : class

Parameters

Type	Name	Description
IQueryable<TEntity>	source	The source query.
Expression<Func<TEntity, IEnumerable<TProperty>>>	selector	A lambda expression representing navigation property to be included (t => t.Property1).
Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>	loadFunc	Defines additional logic for association load query.

Returns

Type	Description
ILoadWithQueryable<TEntity, TProperty>	Returns new query with related data included.

Type Parameters

Name	Description
TEntity	Type of entity being queried.
TProperty	Type of the related entity to be included.

Examples

Following query loads records from Table1 with Reference association, loaded for each Table1 record.

    db.Table1.LoadWith(r => r.Reference);

Following queries loads records from Table1 with Reference1 association and then loads records from Reference2 association for each loaded Reference1 record.

    db.Table1.LoadWith(r => r.Reference1.Reference2);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.Reference1).ThenLoad(r => r.Reference2);

Following query loads records from Table1 with References collection association loaded for each Table1 record.

    db.Table1.LoadWith(r => r.References);

Following query loads records from Table1 with: - Reference1 collection association loaded for each Table1 record; - Reference2 collection association for each loaded Reference1 record; - Reference3 association for each loaded Reference2 record.

Note that a way you access collection association record (by index, using First() method) doesn't affect query results and always select all records.

    db.Table1.LoadWith(r => r.References1[0].References2.First().Reference3);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r => r.References2).ThenLoad(r => r.Reference3);

Following query loads records from Table1 with References collection association loaded for each Table1 record, where References record contains only records without "exclude" text in Name property.

    db.Table1.LoadWith(r => r.References, r => r.Where(rr => !rr.Name.Contains("exclude")));

Following query loads records from Table1 with References1 collection association loaded for each Table1 record, where References1 record also load Reference2 association.

    db.Table1.LoadWith(r => r.References1, r => r.LoadWith(rr => rr.Reference2));

LoadWithAsTable<T>(ITable<T>, Expression<Func<T, Nullable<Object>>>)

Specifies associations, that should be loaded for each loaded record from current table. All associations, specified in selector expression, will be loaded. Take into account that use of this method could require multiple queries to load all requested associations. Some usage examples:

// loads records from Table1 with Reference association loaded for each Table1 record
db.Table1.LoadWithAsTable(r => r.Reference);

// loads records from Table1 with Reference1 association loaded for each Table1 record
// loads records from Reference2 association for each loaded Reference1 record
db.Table1.LoadWithAsTable(r => r.Reference1.Reference2);

// loads records from Table1 with References collection association loaded for each Table1 record
db.Table1.LoadWithAsTable(r => r.References);

// loads records from Table1 with Reference1 collection association loaded for each Table1 record
// loads records from Reference2 collection association for each loaded Reference1 record
// loads records from Reference3 association for each loaded Reference2 record
// note that a way you access collection association record (by index, using First() method) doesn't affect
// query results and always select all records
db.Table1.LoadWithAsTable(r => r.References1[0].References2.First().Reference3);

Declaration

public static ITable<T> LoadWithAsTable<T>(this ITable<T> table, Expression<Func<T, object?>> selector)

Parameters

Type	Name	Description
ITable<T>	table	Table-like query source.
Expression<Func<T, System.Nullable<System.Object>>>	selector	Association selection expression.

Returns

Type	Description
ITable<T>	Table-like query source.

Type Parameters

Name	Description
T	Table record mapping class.

Merge<TTarget>(IQueryable<TTarget>)

Starts merge operation definition from a subquery. If the query is not a table or a cte, it will be converted into a cte as the merge target.

Declaration

public static IMergeableUsing<TTarget> Merge<TTarget>(this IQueryable<TTarget> target)

Parameters

Type	Name	Description
IQueryable<TTarget>	target	Target table.

Returns

Type	Description
IMergeableUsing<TTarget>	Returns merge command builder, that contains only target.

Type Parameters

Name	Description
TTarget	Target record type.

Merge<TTarget>(ITable<TTarget>)

Starts merge operation definition from target table.

Declaration

public static IMergeableUsing<TTarget> Merge<TTarget>(this ITable<TTarget> target)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.

Returns

Type	Description
IMergeableUsing<TTarget>	Returns merge command builder, that contains only target.

Type Parameters

Name	Description
TTarget	Target record type.

Merge<TTarget>(ITable<TTarget>, String)

Starts merge operation definition from target table.

Declaration

public static IMergeableUsing<TTarget> Merge<TTarget>(this ITable<TTarget> target, string hint)

Parameters

Type	Name	Description
ITable<TTarget>	target	Target table.
System.String	hint	Database-specific merge hint.

Returns

Type	Description
IMergeableUsing<TTarget>	Returns merge command builder, that contains only target.

Type Parameters

Name	Description
TTarget	Target record type.

Merge<TTarget, TSource>(IMergeable<TTarget, TSource>)

Executes merge command and returns total number of target records, affected by merge operations.

Declaration

public static int Merge<TTarget, TSource>(this IMergeable<TTarget, TSource> merge)

Parameters

Type	Name	Description
IMergeable<TTarget, TSource>	merge	Merge command definition.

Returns

Type	Description
System.Int32	Returns number of target table records, affected by merge command.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

MergeAsync<TTarget, TSource>(IMergeable<TTarget, TSource>, CancellationToken)

Executes merge command and returns total number of target records, affected by merge operations.

Declaration

public static Task<int> MergeAsync<TTarget, TSource>(this IMergeable<TTarget, TSource> merge, CancellationToken token = null)

Parameters

Type	Name	Description
IMergeable<TTarget, TSource>	merge	Merge command definition.
CancellationToken	token	Asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Returns number of target table records, affected by merge command.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

MergeInto<TTarget, TSource>(IQueryable<TSource>, IQueryable<TTarget>)

Starts merge operation definition from source query.

Declaration

public static IMergeableOn<TTarget, TSource> MergeInto<TTarget, TSource>(this IQueryable<TSource> source, IQueryable<TTarget> target)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
IQueryable<TTarget>	target	Target query. If the query is not a table or a cte, it will be converted into a cte as the merge target.

Returns

Type	Description
IMergeableOn<TTarget, TSource>	Returns merge command builder with source and target set.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

MergeInto<TTarget, TSource>(IQueryable<TSource>, ITable<TTarget>)

Starts merge operation definition from source query.

Declaration

public static IMergeableOn<TTarget, TSource> MergeInto<TTarget, TSource>(this IQueryable<TSource> source, ITable<TTarget> target)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.

Returns

Type	Description
IMergeableOn<TTarget, TSource>	Returns merge command builder with source and target set.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

MergeInto<TTarget, TSource>(IQueryable<TSource>, ITable<TTarget>, String)

Starts merge operation definition from source query.

Declaration

public static IMergeableOn<TTarget, TSource> MergeInto<TTarget, TSource>(this IQueryable<TSource> source, ITable<TTarget> target, string hint)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
System.String	hint	Database-specific merge hint.

Returns

Type	Description
IMergeableOn<TTarget, TSource>	Returns merge command builder with source and target set.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

MergeWithOutput<TTarget, TSource, TOutput>(IMergeable<TTarget, TSource>, Expression<Func<String, TTarget, TTarget, TOutput>>)

Executes merge command and returns output information, affected by merge operations.

Declaration

public static IEnumerable<TOutput> MergeWithOutput<TTarget, TSource, TOutput>(this IMergeable<TTarget, TSource> merge, Expression<Func<string, TTarget, TTarget, TOutput>> outputExpression)

Parameters

Type	Name	Description
IMergeable<TTarget, TSource>	merge	Merge command definition.
Expression<Func<System.String, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.

Returns

Type	Description
IEnumerable<TOutput>	Returns number of target table records, affected by merge command.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.
TOutput	Output table record type.

Remarks

Database support:

MergeWithOutputAsync<TTarget, TSource, TOutput>(IMergeable<TTarget, TSource>, Expression<Func<String, TTarget, TTarget, TOutput>>)

Executes merge command and returns output information, affected by merge operations.

Declaration

public static IAsyncEnumerable<TOutput> MergeWithOutputAsync<TTarget, TSource, TOutput>(this IMergeable<TTarget, TSource> merge, Expression<Func<string, TTarget, TTarget, TOutput>> outputExpression)

Parameters

Type	Name	Description
IMergeable<TTarget, TSource>	merge	Merge command definition.
Expression<Func<System.String, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.

Returns

Type	Description
IAsyncEnumerable<TOutput>	Returns number of target table records, affected by merge command.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.
TOutput	Output table record type.

Remarks

Database support:

MergeWithOutputInto<TTarget, TSource, TOutput>(IMergeable<TTarget, TSource>, ITable<TOutput>, Expression<Func<String, TTarget, TTarget, TOutput>>)

Executes merge command, inserts output information into table and returns total number of target records, affected by merge operations.

Declaration

public static int MergeWithOutputInto<TTarget, TSource, TOutput>(this IMergeable<TTarget, TSource> merge, ITable<TOutput> outputTable, Expression<Func<string, TTarget, TTarget, TOutput>> outputExpression)

Parameters

Type	Name	Description
IMergeable<TTarget, TSource>	merge	Merge command definition.
ITable<TOutput>	outputTable	Table which should handle output result.
Expression<Func<System.String, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Expression supports only record new expression with field initializers.

Returns

Type	Description
System.Int32	Returns number of target table records, affected by merge command.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.
TOutput	Output table record type.

Remarks

Database support:

MergeWithOutputIntoAsync<TTarget, TSource, TOutput>(IMergeable<TTarget, TSource>, ITable<TOutput>, Expression<Func<String, TTarget, TTarget, TOutput>>, CancellationToken)

Executes merge command, inserts output information into table and returns total number of target records, affected by merge operations.

Declaration

public static Task<int> MergeWithOutputIntoAsync<TTarget, TSource, TOutput>(this IMergeable<TTarget, TSource> merge, ITable<TOutput> outputTable, Expression<Func<string, TTarget, TTarget, TOutput>> outputExpression, CancellationToken token = null)

Parameters

Type	Name	Description
IMergeable<TTarget, TSource>	merge	Merge command definition.
ITable<TOutput>	outputTable	Table which should handle output result.
Expression<Func<System.String, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Optional asynchronous operation cancellation token. Expression supports only record new expression with field initializers.
CancellationToken	token

Returns

Type	Description
Task<System.Int32>	Returns number of target table records, affected by merge command.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.
TOutput	Output table record type.

Remarks

Database support:

On<TTarget, TSource>(IMergeableOn<TTarget, TSource>, Expression<Func<TTarget, TSource, Boolean>>)

Adds definition of matching of target and source records using match condition.

Declaration

public static IMergeableSource<TTarget, TSource> On<TTarget, TSource>(this IMergeableOn<TTarget, TSource> merge, Expression<Func<TTarget, TSource, bool>> matchCondition)

Parameters

Type	Name	Description
IMergeableOn<TTarget, TSource>	merge	Merge command builder.
Expression<Func<TTarget, TSource, System.Boolean>>	matchCondition	Rule to match/join target and source records.

Returns

Type	Description
IMergeableSource<TTarget, TSource>	Returns merge command builder with source, target and match (ON) set.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

On<TTarget, TSource, TKey>(IMergeableOn<TTarget, TSource>, Expression<Func<TTarget, TKey>>, Expression<Func<TSource, TKey>>)

Adds definition of matching of target and source records using key value.

Declaration

public static IMergeableSource<TTarget, TSource> On<TTarget, TSource, TKey>(this IMergeableOn<TTarget, TSource> merge, Expression<Func<TTarget, TKey>> targetKey, Expression<Func<TSource, TKey>> sourceKey)

Parameters

Type	Name	Description
IMergeableOn<TTarget, TSource>	merge	Merge command builder.
Expression<Func<TTarget, TKey>>	targetKey	Target record match key definition.
Expression<Func<TSource, TKey>>	sourceKey	Source record match key definition.

Returns

Type	Description
IMergeableSource<TTarget, TSource>	Returns merge command builder with source, target and match (ON) set.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.
TKey	Source and target records join/match key type.

OnTargetKey<TTarget>(IMergeableOn<TTarget, TTarget>)

Adds definition of matching of target and source records using primary key columns.

Declaration

public static IMergeableSource<TTarget, TTarget> OnTargetKey<TTarget>(this IMergeableOn<TTarget, TTarget> merge)

Parameters

Type	Name	Description
IMergeableOn<TTarget, TTarget>	merge	Merge command builder.

Returns

Type	Description
IMergeableSource<TTarget, TTarget>	Returns merge command builder with source, target and match (ON) set.

Type Parameters

Name	Description
TTarget	Target record type.

Or(TableOptions, TableOptions)

Declaration

public static TableOptions Or(this TableOptions tableOptions, TableOptions additionalOptions)

Parameters

Type	Name	Description
TableOptions	tableOptions
TableOptions	additionalOptions

Returns

Type	Description
TableOptions

QueryHint<TSource>(IQueryable<TSource>, String)

Adds a query hint to a generated query.

Declaration

public static IQueryable<TSource> QueryHint<TSource>(this IQueryable<TSource> source, string hint)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Query source.
System.String	hint	SQL text, added as a database specific hint to generated query.

Returns

Type	Description
IQueryable<TSource>	Query source with hints.

Type Parameters

Name	Description
TSource	Table record mapping class.

QueryHint<TSource, TParam>(IQueryable<TSource>, String, TParam)

Adds a query hint to the generated query.

Declaration

public static IQueryable<TSource> QueryHint<TSource, TParam>(this IQueryable<TSource> source, string hint, TParam hintParameter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Query source.
System.String	hint	SQL text, added as a database specific hint to generated query.
TParam	hintParameter	Hint parameter.

Returns

Type	Description
IQueryable<TSource>	Query source with hints.

Type Parameters

Name	Description
TSource	Table record mapping class.
TParam	Hint parameter type

QueryHint<TSource, TParam>(IQueryable<TSource>, String, TParam[])

Adds a query hint to the generated query.

Declaration

public static IQueryable<TSource> QueryHint<TSource, TParam>(this IQueryable<TSource> source, string hint, params TParam[] hintParameters)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Query source.
System.String	hint	SQL text, added as a database specific hint to generated query.
TParam[]	hintParameters	Table hint parameters.

Returns

Type	Description
IQueryable<TSource>	Table-like query source with hints.

Type Parameters

Name	Description
TSource	Table record mapping class.
TParam	Table hint parameter type.

QueryName<TSource>(IQueryable<TSource>, String)

Defines query name for specified sub-query. The query cannot be removed during the query optimization.

Declaration

public static IQueryable<TSource> QueryName<TSource>(this IQueryable<TSource> source, string queryName)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
System.String	queryName	Query name.

Returns

Type	Description
IQueryable<TSource>	Query converted into sub-query.

Type Parameters

Name	Description
TSource	Source query record type.

QueryName<TKey, TElement>(IQueryable<IGrouping<TKey, TElement>>, String)

Defines query name for specified sub-query. The query cannot be removed during the query optimization.

Declaration

public static IQueryable<TKey> QueryName<TKey, TElement>(this IQueryable<IGrouping<TKey, TElement>> grouping, string queryName)

Parameters

Type	Name	Description
IQueryable<IGrouping<TKey, TElement>>	grouping	Source data query.
System.String	queryName	Query name.

Returns

Type	Description
IQueryable<TKey>	Query converted into sub-query.

Type Parameters

Name	Description
TKey	The type of the key of the .
TElement	The type of the values in the .

RemoveOrderBy<TSource>(IQueryable<TSource>)

Removes ordering from current query.

Declaration

public static IQueryable<TSource> RemoveOrderBy<TSource>(this IQueryable<TSource> source)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.

Returns

Type	Description
IQueryable<TSource>	Unsorted query.

Type Parameters

Name	Description
TSource	Source query record type.

RightJoin<TSource>(IQueryable<TSource>, Expression<Func<TSource, Boolean>>)

Defines right outer join between two sub-queries or tables.

Declaration

public static IQueryable<TSource> RightJoin<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Right join operand.
Expression<Func<TSource, System.Boolean>>	predicate	Join predicate.

Returns

Type	Description
IQueryable<TSource>	Right operand.

Type Parameters

Name	Description
TSource	Type of record for right join operand.

RightJoin<TOuter, TInner, TResult>(IQueryable<TOuter>, IQueryable<TInner>, Expression<Func<TOuter, TInner, Boolean>>, Expression<Func<TOuter, TInner, TResult>>)

Defines right outer join between two sub-queries or tables.

Declaration

public static IQueryable<TResult> RightJoin<TOuter, TInner, TResult>(this IQueryable<TOuter> outer, IQueryable<TInner> inner, Expression<Func<TOuter, TInner, bool>> predicate, Expression<Func<TOuter, TInner, TResult>> resultSelector)

Parameters

Type	Name	Description
IQueryable<TOuter>	outer	Left join operand.
IQueryable<TInner>	inner	Right join operand.
Expression<Func<TOuter, TInner, System.Boolean>>	predicate	Join predicate.
Expression<Func<TOuter, TInner, TResult>>	resultSelector	A function to create a result element from two matching elements.

Returns

Type	Description
IQueryable<TResult>	Right operand.

Type Parameters

Name	Description
TOuter	Type of record for left join operand.
TInner	Type of record for right join operand.
TResult	The type of the result elements.

SchemaName<T>(ITable<T>, Nullable<String>)

Overrides owner/schema name with new name for current query. This call will have effect only for databases that support owner/schema name in fully-qualified table name.

Supported by: DB2, Oracle, PostgreSQL, Informix, SQL Server, Sybase ASE.

Declaration

public static ITable<T> SchemaName<T>(this ITable<T> table, string? name)

Parameters

Type	Name	Description
ITable<T>	table	Table-like query source.
System.Nullable<System.String>	name	Name of owner/schema.

Returns

Type	Description
ITable<T>	Table-like query source with new owner/schema name.

Type Parameters

Name	Description
T	Table record mapping class.

Select<T>(IDataContext, Expression<Func<T>>)

Loads scalar value or record from database without explicit table source. Could be usefull for function calls, querying of database variables or properties, subqueries, execution of code on server side.

Declaration

public static T Select<T>(this IDataContext dataContext, Expression<Func<T>> selector)

Parameters

Type	Name	Description
IDataContext	dataContext	Database connection context.
Expression<Func<T>>	selector	Value selection expression.

Returns

Type	Description
T	Requested value.

Type Parameters

Name	Description
T	Type of result.

SelectAsync<T>(IDataContext, Expression<Func<T>>)

Loads scalar value or record from database without explicit table source asynchronously. Could be usefull for function calls, querying of database variables or properties, subqueries, execution of code on server side.

Declaration

public static async Task<T> SelectAsync<T>(this IDataContext dataContext, Expression<Func<T>> selector)

Parameters

Type	Name	Description
IDataContext	dataContext	Database connection context.
Expression<Func<T>>	selector	Value selection expression.

Returns

Type	Description
Task<T>	Requested value.

Type Parameters

Name	Description
T	Type of result.

ServerName<T>(ITable<T>, Nullable<String>)

Overrides linked server name with new name for current query. This call will have effect only for databases that support linked server name in fully-qualified table name.

Supported by: SQL Server, Informix, Oracle, SAP HANA2.

Declaration

public static ITable<T> ServerName<T>(this ITable<T> table, string? name)

Parameters

Type	Name	Description
ITable<T>	table	Table-like query source.
System.Nullable<System.String>	name	Name of linked server.

Returns

Type	Description
ITable<T>	Table-like query source with new linked server name.

Type Parameters

Name	Description
T	Table record mapping class.

Set<T>(IQueryable<T>, Expression<Func<T, String>>)

Adds update field expression to query. It can be any expression with string interpolation.

Declaration

public static IUpdatable<T> Set<T>(this IQueryable<T> source, Expression<Func<T, string>> setExpression)

Parameters

Type	Name	Description
IQueryable<T>	source	Source query with records to update.
Expression<Func<T, System.String>>	setExpression	Custom update expression.

Returns

Type	Description
IUpdatable<T>	IUpdatable<T> query.

Type Parameters

Name	Description
T	Updated record type.

Examples

The following example shows how to append string value to appropriate field.

 db.Users.Where(u => u.UserId == id)
        .Set(u => $"{u.Name}" += {str}")
        .Update();

Set<T>(IUpdatable<T>, Expression<Func<T, String>>)

Adds update field expression to query. It can be any expression with string interpolation.

Declaration

public static IUpdatable<T> Set<T>(this IUpdatable<T> source, Expression<Func<T, string>> setExpression)

Parameters

Type	Name	Description
IUpdatable<T>	source	Source query with records to update.
Expression<Func<T, System.String>>	setExpression	Custom update expression.

Returns

Type	Description
IUpdatable<T>	IUpdatable<T> query.

Type Parameters

Name	Description
T	Updated record type.

Examples

The following example shows how to append string value to appropriate field.

 db.Users.Where(u => u.UserId == id)
        .AsUpdatable()
        .Set(u => $"{u.Name}" += {str}")
        .Update();

Set<T, TV>(IQueryable<T>, Expression<Func<T, TV>>, TV)

Adds update field expression to query.

Declaration

public static IUpdatable<T> Set<T, TV>(this IQueryable<T> source, Expression<Func<T, TV>> extract, TV value)

Parameters

Type	Name	Description
IQueryable<T>	source	Source query with records to update.
Expression<Func<T, TV>>	extract	Updated field selector expression.
TV	value	Value, assigned to updated field.

Returns

Type	Description
IUpdatable<T>	IUpdatable<T> query.

Type Parameters

Name	Description
T	Updated record type.
TV	Updated field type.

Set<T, TV>(IQueryable<T>, Expression<Func<T, TV>>, Expression<Func<T, TV>>)

Adds update field expression to query.

Declaration

public static IUpdatable<T> Set<T, TV>(this IQueryable<T> source, Expression<Func<T, TV>> extract, Expression<Func<T, TV>> update)

Parameters

Type	Name	Description
IQueryable<T>	source	Source query with records to update.
Expression<Func<T, TV>>	extract	Updated field selector expression.
Expression<Func<T, TV>>	update	Updated field setter expression. Uses updated record as parameter.

Returns

Type	Description
IUpdatable<T>	IUpdatable<T> query.

Type Parameters

Name	Description
T	Updated record type.
TV	Updated field type.

Set<T, TV>(IQueryable<T>, Expression<Func<T, TV>>, Expression<Func<TV>>)

Adds update field expression to query.

Declaration

public static IUpdatable<T> Set<T, TV>(this IQueryable<T> source, Expression<Func<T, TV>> extract, Expression<Func<TV>> update)

Parameters

Type	Name	Description
IQueryable<T>	source	Source query with records to update.
Expression<Func<T, TV>>	extract	Updated field selector expression.
Expression<Func<TV>>	update	Updated field setter expression.

Returns

Type	Description
IUpdatable<T>	IUpdatable<T> query.

Type Parameters

Name	Description
T	Updated record type.
TV	Updated field type.

Set<T, TV>(IUpdatable<T>, Expression<Func<T, TV>>, TV)

Adds update field expression to query.

Declaration

public static IUpdatable<T> Set<T, TV>(this IUpdatable<T> source, Expression<Func<T, TV>> extract, TV value)

Parameters

Type	Name	Description
IUpdatable<T>	source	Source query with records to update.
Expression<Func<T, TV>>	extract	Updated field selector expression.
TV	value	Value, assigned to updated field.

Returns

Type	Description
IUpdatable<T>	IUpdatable<T> query.

Type Parameters

Name	Description
T	Updated record type.
TV	Updated field type.

Set<T, TV>(IUpdatable<T>, Expression<Func<T, TV>>, Expression<Func<T, TV>>)

Adds update field expression to query.

Declaration

public static IUpdatable<T> Set<T, TV>(this IUpdatable<T> source, Expression<Func<T, TV>> extract, Expression<Func<T, TV>> update)

Parameters

Type	Name	Description
IUpdatable<T>	source	Source query with records to update.
Expression<Func<T, TV>>	extract	Updated field selector expression.
Expression<Func<T, TV>>	update	Updated field setter expression. Uses updated record as parameter.

Returns

Type	Description
IUpdatable<T>	IUpdatable<T> query.

Type Parameters

Name	Description
T	Updated record type.
TV	Updated field type.

Set<T, TV>(IUpdatable<T>, Expression<Func<T, TV>>, Expression<Func<TV>>)

Adds update field expression to query.

Declaration

public static IUpdatable<T> Set<T, TV>(this IUpdatable<T> source, Expression<Func<T, TV>> extract, Expression<Func<TV>> update)

Parameters

Type	Name	Description
IUpdatable<T>	source	Source query with records to update.
Expression<Func<T, TV>>	extract	Updated field selector expression.
Expression<Func<TV>>	update	Updated field setter expression.

Returns

Type	Description
IUpdatable<T>	IUpdatable<T> query.

Type Parameters

Name	Description
T	Updated record type.
TV	Updated field type.

Skip<TSource>(IQueryable<TSource>, Expression<Func<Int32>>)

Ignores first N records from source query.

Declaration

public static IQueryable<TSource> Skip<TSource>(this IQueryable<TSource> source, Expression<Func<int>> count)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
Expression<Func<System.Int32>>	count	Expression that defines number of records to skip.

Returns

Type	Description
IQueryable<TSource>	Query without skipped records.

Type Parameters

Name	Description
TSource	Source table record type.

SubQueryHint<TSource>(IQueryable<TSource>, String)

Adds a query hint to a generated query.

Declaration

public static IQueryable<TSource> SubQueryHint<TSource>(this IQueryable<TSource> source, string hint)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Query source.
System.String	hint	SQL text, added as a database specific hint to generated query.

Returns

Type	Description
IQueryable<TSource>	Query source with hints.

Type Parameters

Name	Description
TSource	Table record mapping class.

SubQueryHint<TSource, TParam>(IQueryable<TSource>, String, TParam)

Adds a query hint to the generated query.

Declaration

public static IQueryable<TSource> SubQueryHint<TSource, TParam>(this IQueryable<TSource> source, string hint, TParam hintParameter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Query source.
System.String	hint	SQL text, added as a database specific hint to generated query.
TParam	hintParameter	Hint parameter.

Returns

Type	Description
IQueryable<TSource>	Query source with hints.

Type Parameters

Name	Description
TSource	Table record mapping class.
TParam	Hint parameter type

SubQueryHint<TSource, TParam>(IQueryable<TSource>, String, TParam[])

Adds a query hint to the generated query.

Declaration

public static IQueryable<TSource> SubQueryHint<TSource, TParam>(this IQueryable<TSource> source, string hint, params TParam[] hintParameters)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Query source.
System.String	hint	SQL text, added as a database specific hint to generated query.
TParam[]	hintParameters	Table hint parameters.

Returns

Type	Description
IQueryable<TSource>	Table-like query source with hints.

Type Parameters

Name	Description
TSource	Table record mapping class.
TParam	Table hint parameter type.

TableHint<TSource>(ITable<TSource>, String)

Adds a table hint to a table in generated query.

Declaration

public static ITable<TSource> TableHint<TSource>(this ITable<TSource> table, string hint)

Parameters

Type	Name	Description
ITable<TSource>	table	Table-like query source.
System.String	hint	SQL text, added as a database specific hint to generated query.

Returns

Type	Description
ITable<TSource>	Table-like query source with table hints.

Type Parameters

Name	Description
TSource	Table record mapping class.

TableHint<TSource, TParam>(ITable<TSource>, String, TParam)

Adds a table hint to a table in generated query.

Declaration

public static ITable<TSource> TableHint<TSource, TParam>(this ITable<TSource> table, string hint, TParam hintParameter)

Parameters

Type	Name	Description
ITable<TSource>	table	Table-like query source.
System.String	hint	SQL text, added as a database specific hint to generated query.
TParam	hintParameter	Table hint parameter.

Returns

Type	Description
ITable<TSource>	Table-like query source with table hints.

Type Parameters

Name	Description
TSource	Table record mapping class.
TParam	Table hint parameter type.

TableHint<TSource, TParam>(ITable<TSource>, String, TParam[])

Adds a table hint to a table in generated query.

Declaration

public static ITable<TSource> TableHint<TSource, TParam>(this ITable<TSource> table, string hint, params TParam[] hintParameters)

Parameters

Type	Name	Description
ITable<TSource>	table	Table-like query source.
System.String	hint	SQL text, added as a database specific hint to generated query.
TParam[]	hintParameters	Table hint parameters.

Returns

Type	Description
ITable<TSource>	Table-like query source with table hints.

Type Parameters

Name	Description
TSource	Table record mapping class.
TParam	Table hint parameter type.

TableID<T>(ITable<T>, Nullable<String>)

Assigns table id.

Declaration

public static ITable<T> TableID<T>(this ITable<T> table, string? id)

Parameters

Type	Name	Description
ITable<T>	table	Table-like query source.
System.Nullable<System.String>	id	Table ID.

Returns

Type	Description
ITable<T>	Table-like query source with new name.

Type Parameters

Name	Description
T	Table record mapping class.

TableName<T>(ITable<T>, String)

Overrides table or view name with new name for current query.

Declaration

public static ITable<T> TableName<T>(this ITable<T> table, string name)

Parameters

Type	Name	Description
ITable<T>	table	Table-like query source.
System.String	name	Name of table.

Returns

Type	Description
ITable<T>	Table-like query source with new name.

Type Parameters

Name	Description
T	Table record mapping class.

TablesInScopeHint<TSource>(IQueryable<TSource>, String)

Adds a table hint to all the tables in the method scope.

Declaration

public static IQueryable<TSource> TablesInScopeHint<TSource>(this IQueryable<TSource> source, string hint)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Query source.
System.String	hint	SQL text, added as a database specific hint to generated query.

Returns

Type	Description
IQueryable<TSource>	Query source with table hints.

Type Parameters

Name	Description
TSource	Table record mapping class.

TablesInScopeHint<TSource>(IQueryable<TSource>, String, Object[])

Adds a table hint to all the tables in the method scope.

Declaration

public static IQueryable<TSource> TablesInScopeHint<TSource>(this IQueryable<TSource> source, string hint, params object[] hintParameters)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Query source.
System.String	hint	SQL text, added as a database specific hint to generated query.
System.Object[]	hintParameters	Table hint parameters.

Returns

Type	Description
IQueryable<TSource>	Query source with table hints.

Type Parameters

Name	Description
TSource	Table record mapping class.

TablesInScopeHint<TSource, TParam>(IQueryable<TSource>, String, TParam)

Adds a table hint to all the tables in the method scope.

Declaration

public static IQueryable<TSource> TablesInScopeHint<TSource, TParam>(this IQueryable<TSource> source, string hint, TParam hintParameter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Query source.
System.String	hint	SQL text, added as a database specific hint to generated query.
TParam	hintParameter	Table hint parameter.

Returns

Type	Description
IQueryable<TSource>	Query source with table hints.

Type Parameters

Name	Description
TSource	Table record mapping class.
TParam	Table hint parameter type.

TagQuery<TSource>(IQueryable<TSource>, String)

Adds a tag comment before generated query.

The example below will produce following code before generated query: /* my tag */\r\n
db.Table.TagQuery("my tag");

Declaration

public static IQueryable<TSource> TagQuery<TSource>(this IQueryable<TSource> source, string tagValue)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
System.String	tagValue	Tag text to be added as comment before generated query.

Returns

Type	Description
IQueryable<TSource>	Query with tag.

Type Parameters

Name	Description
TSource	Table record mapping class.

TagQuery<T>(ITable<T>, String)

Adds a tag comment before generated query for table.

The example below will produce following code before generated query: /* my tag */\r\n
db.Table.TagQuery("my tag");

Declaration

public static ITable<T> TagQuery<T>(this ITable<T> table, string tagValue)

Parameters

Type	Name	Description
ITable<T>	table	Table-like query source.
System.String	tagValue	Tag text to be added as comment before generated query.

Returns

Type	Description
ITable<T>	Table-like query source with tag.

Type Parameters

Name	Description
T	Table record mapping class.

Take<TSource>(IQueryable<TSource>, Expression<Func<Int32>>)

Limits number of records, returned from query.

Declaration

public static IQueryable<TSource> Take<TSource>(this IQueryable<TSource> source, Expression<Func<int>> count)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
Expression<Func<System.Int32>>	count	Expression that defines number of records to select.

Returns

Type	Description
IQueryable<TSource>	Query with limit applied.

Type Parameters

Name	Description
TSource	Source table record type.

Take<TSource>(IQueryable<TSource>, Expression<Func<Int32>>, TakeHints)

Limits number of records, returned from query. Allows to specify TAKE clause hints. Using this method may cause runtime LinqException if take hints are not supported by database.

Declaration

public static IQueryable<TSource> Take<TSource>(this IQueryable<TSource> source, Expression<Func<int>> count, TakeHints hints)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
Expression<Func<System.Int32>>	count	Expression that defines SQL TAKE parameter value.
TakeHints	hints	TakeHints hints for SQL TAKE clause.

Returns

Type	Description
IQueryable<TSource>	Query with limit applied.

Type Parameters

Name	Description
TSource	Source table record type.

Take<TSource>(IQueryable<TSource>, Int32, TakeHints)

Limits number of records, returned from query. Allows to specify TAKE clause hints. Using this method may cause runtime LinqException if take hints are not supported by database.

Declaration

public static IQueryable<TSource> Take<TSource>(this IQueryable<TSource> source, int count, TakeHints hints)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
System.Int32	count	SQL TAKE parameter value.
TakeHints	hints	TakeHints hints for SQL TAKE clause.

Returns

Type	Description
IQueryable<TSource>	Query with limit applied.

Type Parameters

Name	Description
TSource	Source table record type.

ThenLoad<TEntity, TPreviousProperty, TProperty>(ILoadWithQueryable<TEntity, TPreviousProperty>, Expression<Func<TPreviousProperty, TProperty>>)

Specifies associations that should be loaded for parent association, loaded by previous LoadWith/ThenLoad call in chain. All associations, specified in selector expression, will be loaded. Take into account that use of this method could require multiple queries to load all requested associations.

Declaration

public static ILoadWithQueryable<TEntity, TProperty> ThenLoad<TEntity, TPreviousProperty, TProperty>(this ILoadWithQueryable<TEntity, TPreviousProperty> source, Expression<Func<TPreviousProperty, TProperty>> selector)
    where TEntity : class

Parameters

Type	Name	Description
ILoadWithQueryable<TEntity, TPreviousProperty>	source	The source query.
Expression<Func<TPreviousProperty, TProperty>>	selector	A lambda expression representing navigation property to be included (t => t.Property1).

Returns

Type	Description
ILoadWithQueryable<TEntity, TProperty>	Returns new query with related data included.

Type Parameters

Name	Description
TEntity	Type of entity being queried.
TPreviousProperty	Type of parent association.
TProperty	Type of the related entity to be included.

Examples

Following queries loads records from Table1 with Reference1 association and then loads records from Reference2 association for each loaded Reference1 record.

    db.Table1.LoadWith(r => r.Reference1.Reference2);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.Reference1).ThenLoad(r => r.Reference2);

Note that a way you access collection association record (by index, using First() method) doesn't affect query results and always select all records.

    db.Table1.LoadWith(r => r.References1[0].References2.First().Reference3);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r => r.References2).ThenLoad(r => r.Reference3);

ThenLoad<TEntity, TPreviousProperty, TProperty>(ILoadWithQueryable<TEntity, TPreviousProperty>, Expression<Func<TPreviousProperty, TProperty>>, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>)

Specifies associations that should be loaded for parent association, loaded by previous LoadWith/ThenLoad call in chain. All associations, specified in selector expression, will be loaded. Take into account that use of this method could require multiple queries to load all requested associations. loadFunc parameter could be used to define additional association loading logic like filters or loading of more associations.

Declaration

public static ILoadWithQueryable<TEntity, TProperty> ThenLoad<TEntity, TPreviousProperty, TProperty>(this ILoadWithQueryable<TEntity, TPreviousProperty> source, Expression<Func<TPreviousProperty, TProperty>> selector, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>> loadFunc)
    where TEntity : class

Parameters

Type	Name	Description
ILoadWithQueryable<TEntity, TPreviousProperty>	source	The source query.
Expression<Func<TPreviousProperty, TProperty>>	selector	A lambda expression representing navigation property to be included (t => t.Property1).
Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>	loadFunc	Defines additional logic for association load query.

Returns

Type	Description
ILoadWithQueryable<TEntity, TProperty>	Returns new query with related data included.

Type Parameters

Name	Description
TEntity	Type of entity being queried.
TPreviousProperty	Type of parent association.
TProperty	Type of the related entity to be included.

Examples

Following queries loads records from Table1 with Reference1 association and then loads records from Reference2 association for each loaded Reference1 record.

    db.Table1.LoadWith(r => r.Reference1.Reference2);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.Reference1).ThenLoad(r => r.Reference2);

Note that a way you access collection association record (by index, using First() method) doesn't affect query results and always select all records.

    db.Table1.LoadWith(r => r.References1[0].References2.First().Reference3);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r => r.References2).ThenLoad(r => r.Reference3);

Following query loads records from Table1 with References1 collection association loaded for each Table1 record with References2 collection association loaded for each record in References1, with filter over References2 record to include only records without "exclude" text in Name property.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r1 => r1.References2, r2 => r2.Where(rr2 => !rr2.Name.Contains("exclude")));

ThenLoad<TEntity, TPreviousProperty, TProperty>(ILoadWithQueryable<TEntity, TPreviousProperty>, Expression<Func<TPreviousProperty, IEnumerable<TProperty>>>, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>)

Specifies associations that should be loaded for parent association, loaded by previous LoadWith/ThenLoad call in chain. All associations, specified in selector expression, will be loaded. Take into account that use of this method could require multiple queries to load all requested associations. loadFunc parameter could be used to define additional association loading logic like filters or loading of more associations.

Declaration

public static ILoadWithQueryable<TEntity, TProperty> ThenLoad<TEntity, TPreviousProperty, TProperty>(this ILoadWithQueryable<TEntity, TPreviousProperty> source, Expression<Func<TPreviousProperty, IEnumerable<TProperty>>> selector, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>> loadFunc)
    where TEntity : class

Parameters

Type	Name	Description
ILoadWithQueryable<TEntity, TPreviousProperty>	source	The source query.
Expression<Func<TPreviousProperty, IEnumerable<TProperty>>>	selector	A lambda expression representing navigation property to be included (t => t.Property1).
Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>	loadFunc	Defines additional logic for association load query.

Returns

Type	Description
ILoadWithQueryable<TEntity, TProperty>	Returns new query with related data included.

Type Parameters

Name	Description
TEntity	Type of entity being queried.
TPreviousProperty	Type of parent association.
TProperty	Type of the related entity to be included.

Examples

Following queries loads records from Table1 with Reference1 association and then loads records from Reference2 association for each loaded Reference1 record.

    db.Table1.LoadWith(r => r.Reference1.Reference2);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.Reference1).ThenLoad(r => r.Reference2);

Note that a way you access collection association record (by index, using First() method) doesn't affect query results and always select all records.

    db.Table1.LoadWith(r => r.References1[0].References2.First().Reference3);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r => r.References2).ThenLoad(r => r.Reference3);

Following query loads records from Table1 with References1 collection association loaded for each Table1 record with References2 collection association loaded for each record in References1, with filter over References2 record to include only records without "exclude" text in Name property.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r1 => r1.References2, r2 => r2.Where(rr2 => !rr2.Name.Contains("exclude")));

ThenLoad<TEntity, TPreviousProperty, TProperty>(ILoadWithQueryable<TEntity, IEnumerable<TPreviousProperty>>, Expression<Func<TPreviousProperty, TProperty>>)

Specifies associations that should be loaded for parent association, loaded by previous LoadWith/ThenLoad call in chain. All associations, specified in selector expression, will be loaded. Take into account that use of this method could require multiple queries to load all requested associations.

Declaration

public static ILoadWithQueryable<TEntity, TProperty> ThenLoad<TEntity, TPreviousProperty, TProperty>(this ILoadWithQueryable<TEntity, IEnumerable<TPreviousProperty>> source, Expression<Func<TPreviousProperty, TProperty>> selector)
    where TEntity : class

Parameters

Type	Name	Description
ILoadWithQueryable<TEntity, IEnumerable<TPreviousProperty>>	source	The source query.
Expression<Func<TPreviousProperty, TProperty>>	selector	A lambda expression representing navigation property to be included (t => t.Property1).

Returns

Type	Description
ILoadWithQueryable<TEntity, TProperty>	Returns new query with related data included.

Type Parameters

Name	Description
TEntity	Type of entity being queried.
TPreviousProperty	Type of parent association.
TProperty	Type of the related entity to be included.

Examples

Following queries loads records from Table1 with Reference1 association and then loads records from Reference2 association for each loaded Reference1 record.

    db.Table1.LoadWith(r => r.Reference1.Reference2);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.Reference1).ThenLoad(r => r.Reference2);

Note that a way you access collection association record (by index, using First() method) doesn't affect query results and always select all records.

    db.Table1.LoadWith(r => r.References1[0].References2.First().Reference3);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r => r.References2).ThenLoad(r => r.Reference3);

ThenLoad<TEntity, TPreviousProperty, TProperty>(ILoadWithQueryable<TEntity, IEnumerable<TPreviousProperty>>, Expression<Func<TPreviousProperty, TProperty>>, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>)

Specifies associations that should be loaded for parent association, loaded by previous LoadWith/ThenLoad call in chain. All associations, specified in selector expression, will be loaded. Take into account that use of this method could require multiple queries to load all requested associations. loadFunc parameter could be used to define additional association loading logic like filters or loading of more associations.

Declaration

public static ILoadWithQueryable<TEntity, TProperty> ThenLoad<TEntity, TPreviousProperty, TProperty>(this ILoadWithQueryable<TEntity, IEnumerable<TPreviousProperty>> source, Expression<Func<TPreviousProperty, TProperty>> selector, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>> loadFunc)
    where TEntity : class

Parameters

Type	Name	Description
ILoadWithQueryable<TEntity, IEnumerable<TPreviousProperty>>	source	The source query.
Expression<Func<TPreviousProperty, TProperty>>	selector	A lambda expression representing navigation property to be included (t => t.Property1).
Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>	loadFunc	Defines additional logic for association load query.

Returns

Type	Description
ILoadWithQueryable<TEntity, TProperty>	Returns new query with related data included.

Type Parameters

Name	Description
TEntity	Type of entity being queried.
TPreviousProperty	Type of parent association.
TProperty	Type of the related entity to be included.

Examples

Following queries loads records from Table1 with Reference1 association and then loads records from Reference2 association for each loaded Reference1 record.

    db.Table1.LoadWith(r => r.Reference1.Reference2);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.Reference1).ThenLoad(r => r.Reference2);

Note that a way you access collection association record (by index, using First() method) doesn't affect query results and always select all records.

    db.Table1.LoadWith(r => r.References1[0].References2.First().Reference3);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r => r.References2).ThenLoad(r => r.Reference3);

Following query loads records from Table1 with References1 collection association loaded for each Table1 record with References2 collection association loaded for each record in References1, with filter over References2 record to include only records without "exclude" text in Name property.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r1 => r1.References2, r2 => r2.Where(rr2 => !rr2.Name.Contains("exclude")));

ThenLoad<TEntity, TPreviousProperty, TProperty>(ILoadWithQueryable<TEntity, IEnumerable<TPreviousProperty>>, Expression<Func<TPreviousProperty, IEnumerable<TProperty>>>, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>)

Specifies associations that should be loaded for parent association, loaded by previous LoadWith/ThenLoad call in chain. All associations, specified in selector expression, will be loaded. Take into account that use of this method could require multiple queries to load all requested associations. loadFunc parameter could be used to define additional association loading logic like filters or loading of more associations.

Declaration

public static ILoadWithQueryable<TEntity, TProperty> ThenLoad<TEntity, TPreviousProperty, TProperty>(this ILoadWithQueryable<TEntity, IEnumerable<TPreviousProperty>> source, Expression<Func<TPreviousProperty, IEnumerable<TProperty>>> selector, Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>> loadFunc)
    where TEntity : class

Parameters

Type	Name	Description
ILoadWithQueryable<TEntity, IEnumerable<TPreviousProperty>>	source	The source query.
Expression<Func<TPreviousProperty, IEnumerable<TProperty>>>	selector	A lambda expression representing navigation property to be included (t => t.Property1).
Expression<Func<IQueryable<TProperty>, IQueryable<TProperty>>>	loadFunc	Defines additional logic for association load query.

Returns

Type	Description
ILoadWithQueryable<TEntity, TProperty>	Returns new query with related data included.

Type Parameters

Name	Description
TEntity	Type of entity being queried.
TPreviousProperty	Type of parent association.
TProperty	Type of the related entity to be included.

Examples

Following queries loads records from Table1 with Reference1 association and then loads records from Reference2 association for each loaded Reference1 record.

    db.Table1.LoadWith(r => r.Reference1.Reference2);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.Reference1).ThenLoad(r => r.Reference2);

Note that a way you access collection association record (by index, using First() method) doesn't affect query results and always select all records.

    db.Table1.LoadWith(r => r.References1[0].References2.First().Reference3);

Same query using ThenLoad extension.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r => r.References2).ThenLoad(r => r.Reference3);

Following query loads records from Table1 with References1 collection association loaded for each Table1 record with References2 collection association loaded for each record in References1, with filter over References2 record to include only records without "exclude" text in Name property.

    db.Table1.LoadWith(r => r.References1).ThenLoad(r1 => r1.References2, r2 => r2.Where(rr2 => !rr2.Name.Contains("exclude")));

ThenOrBy<TSource, TKey>(IQueryable<TSource>, Expression<Func<TSource, TKey>>)

Adds ascending sort expression to a query. If query already sorted, existing sorting will be preserved and updated with new sort.

Declaration

public static IOrderedQueryable<TSource> ThenOrBy<TSource, TKey>(this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
Expression<Func<TSource, TKey>>	keySelector	Sort expression selector.

Returns

Type	Description
IOrderedQueryable<TSource>	Sorted query.

Type Parameters

Name	Description
TSource	Source query record type.
TKey	Sort expression type.

ThenOrByDescending<TSource, TKey>(IQueryable<TSource>, Expression<Func<TSource, TKey>>)

Adds descending sort expression to a query. If query already sorted, existing sorting will be preserved and updated with new sort.

Declaration

public static IOrderedQueryable<TSource> ThenOrByDescending<TSource, TKey>(this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source query.
Expression<Func<TSource, TKey>>	keySelector	Sort expression selector.

Returns

Type	Description
IOrderedQueryable<TSource>	Sorted query.

Type Parameters

Name	Description
TSource	Source query record type.
TKey	Sort expression type.

Truncate<T>(ITable<T>, Boolean)

Truncates database table.

Declaration

public static int Truncate<T>(this ITable<T> target, bool resetIdentity = true)

Parameters

Type	Name	Description
ITable<T>	target	Truncated table.
System.Boolean	resetIdentity	Performs reset identity column.

Returns

Type	Description
System.Int32	Number of affected records. Usually -1 as it is not data modification operation.

Type Parameters

Name	Description
T	Table record type.

TruncateAsync<T>(ITable<T>, Boolean, CancellationToken)

Truncates database table asynchronously.

Declaration

public static async Task<int> TruncateAsync<T>(this ITable<T> target, bool resetIdentity = true, CancellationToken token = null)

Parameters

Type	Name	Description
ITable<T>	target	Truncated table.
System.Boolean	resetIdentity	Performs reset identity column.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records. Usually -1 as it is not data modification operation.

Type Parameters

Name	Description
T	Table record type.

UnionAll<TSource>(IQueryable<TSource>, IEnumerable<TSource>)

Concatenates two sequences, similar to .

Declaration

public static IQueryable<TSource> UnionAll<TSource>(this IQueryable<TSource> source1, IEnumerable<TSource> source2)

Parameters

Type	Name	Description
IQueryable<TSource>	source1	The first sequence to concatenate.
IEnumerable<TSource>	source2	The sequence to concatenate to the first sequence.

Returns

Type	Description
IQueryable<TSource>	An that contains the concatenated elements of the two input sequences.

Type Parameters

Name	Description
TSource	The type of the elements of the input sequences.

Update<T>(IQueryable<T>, Expression<Func<T, T>>)

Executes update operation using source query as record filter.

Declaration

public static int Update<T>(this IQueryable<T> source, Expression<Func<T, T>> setter)

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.

Update<T>(IQueryable<T>, Expression<Func<T, Boolean>>, Expression<Func<T, T>>)

Executes update operation using source query as record filter with additional filter expression.

Declaration

public static int Update<T>(this IQueryable<T> source, Expression<Func<T, bool>> predicate, Expression<Func<T, T>> setter)

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, System.Boolean>>	predicate	Filter expression, to specify what records from source query should be updated.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.

Update<T>(IUpdatable<T>)

Executes update operation for already configured update query.

Declaration

public static int Update<T>(this IUpdatable<T> source)

Parameters

Type	Name	Description
IUpdatable<T>	source	Update query.

Returns

Type	Description
System.Int32	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.

Update<TSource, TTarget>(IQueryable<TSource>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget>>)

Executes update-from-source operation against target table. Also see Update<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>) method.

Declaration

public static int Update<TSource, TTarget>(this IQueryable<TSource> source, Expression<Func<TSource, TTarget>> target, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TTarget>>	target	Target table selection expression.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of updated records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

Update<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>)

Executes update-from-source operation against target table.

Declaration

public static int Update<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of updated records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

UpdateAsync<T>(IQueryable<T>, Expression<Func<T, T>>, CancellationToken)

Executes update operation asynchronously using source query as record filter.

Declaration

public static async Task<int> UpdateAsync<T>(this IQueryable<T> source, Expression<Func<T, T>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.

UpdateAsync<T>(IQueryable<T>, Expression<Func<T, Boolean>>, Expression<Func<T, T>>, CancellationToken)

Executes update operation asynchronously using source query as record filter with additional filter expression.

Declaration

public static async Task<int> UpdateAsync<T>(this IQueryable<T> source, Expression<Func<T, bool>> predicate, Expression<Func<T, T>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, System.Boolean>>	predicate	Filter expression, to specify what records from source query should be updated.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.

UpdateAsync<T>(IUpdatable<T>, CancellationToken)

Executes update operation asynchronously for already configured update query.

Declaration

public static async Task<int> UpdateAsync<T>(this IUpdatable<T> source, CancellationToken token = null)

Parameters

Type	Name	Description
IUpdatable<T>	source	Update query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.

UpdateAsync<TSource, TTarget>(IQueryable<TSource>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget>>, CancellationToken)

Executes update-from-source operation asynchronously against target table. Also see UpdateAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, CancellationToken) method.

Declaration

public static async Task<int> UpdateAsync<TSource, TTarget>(this IQueryable<TSource> source, Expression<Func<TSource, TTarget>> target, Expression<Func<TSource, TTarget>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TTarget>>	target	Target table selection expression.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of updated records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

UpdateAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, CancellationToken)

Executes update-from-source operation asynchronously against target table.

Declaration

public static async Task<int> UpdateAsync<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of updated records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

UpdateWhenMatched<TTarget>(IMergeableSource<TTarget, TTarget>)

Adds new update operation to merge and returns new merge command with added operation. This operation updates record in target table using data from the same fields of source record for each record that was matched in source and target, if it wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TTarget> UpdateWhenMatched<TTarget>(this IMergeableSource<TTarget, TTarget> merge)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TTarget>	merge	Merge command builder interface.

Returns

Type	Description
IMergeable<TTarget, TTarget>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target and source records type.

UpdateWhenMatched<TTarget, TSource>(IMergeableSource<TTarget, TSource>, Expression<Func<TTarget, TSource, TTarget>>)

Adds new update operation to merge and returns new merge command with added operation. This operation updates record in target table using user-defined values for target columns for each record that was matched in source and target, if it wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TSource> UpdateWhenMatched<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge, Expression<Func<TTarget, TSource, TTarget>> setter)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.
Expression<Func<TTarget, TSource, TTarget>>	setter	Update record expression using target and source records. Expression should be a call to target record constructor with field/properties initializers to be recognized by API.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

UpdateWhenMatchedAnd<TTarget>(IMergeableSource<TTarget, TTarget>, Expression<Func<TTarget, TTarget, Boolean>>)

Adds new update operation to merge and returns new merge command with added operation. This operation updates record in target table using data from the same fields of source record for each record that was matched in source and target and passes filtering with specified predicate, if it wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TTarget> UpdateWhenMatchedAnd<TTarget>(this IMergeableSource<TTarget, TTarget> merge, Expression<Func<TTarget, TTarget, bool>> searchCondition)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TTarget>	merge	Merge command builder interface.
Expression<Func<TTarget, TTarget, System.Boolean>>	searchCondition	Operation execution condition over target and source records.

Returns

Type	Description
IMergeable<TTarget, TTarget>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target and source records type.

UpdateWhenMatchedAnd<TTarget, TSource>(IMergeableSource<TTarget, TSource>, Expression<Func<TTarget, TSource, Boolean>>, Expression<Func<TTarget, TSource, TTarget>>)

Adds new update operation to merge and returns new merge command with added operation. This operation updates record in target table using user-defined values for target columns for each record that was matched in source and target and passes filtering with specified predicate, if it wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TSource> UpdateWhenMatchedAnd<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge, Expression<Func<TTarget, TSource, bool>> searchCondition, Expression<Func<TTarget, TSource, TTarget>> setter)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.
Expression<Func<TTarget, TSource, System.Boolean>>	searchCondition	Operation execution condition over target and source records.
Expression<Func<TTarget, TSource, TTarget>>	setter	Update record expression using target and source records. Expression should be a call to target record constructor with field/properties initializers to be recognized by API.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

UpdateWhenMatchedAndThenDelete<TTarget>(IMergeableSource<TTarget, TTarget>, Expression<Func<TTarget, TTarget, Boolean>>, Expression<Func<TTarget, TTarget, Boolean>>)

IMPORTANT: This operation supported only by Oracle Database. Adds new update with delete operation to merge and returns new merge command with added operation. This operation updates record in target table using data from the same fields of source record for each record that was matched in source and target and passes filtering with specified predicate, if it wasn't processed by previous operations. After that it removes updated records if they are matched by delete predicate.

Declaration

public static IMergeable<TTarget, TTarget> UpdateWhenMatchedAndThenDelete<TTarget>(this IMergeableSource<TTarget, TTarget> merge, Expression<Func<TTarget, TTarget, bool>> searchCondition, Expression<Func<TTarget, TTarget, bool>> deleteCondition)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TTarget>	merge	Merge command builder interface.
Expression<Func<TTarget, TTarget, System.Boolean>>	searchCondition	Update execution condition over target and source records.
Expression<Func<TTarget, TTarget, System.Boolean>>	deleteCondition	Delete execution condition over updated target and source records.

Returns

Type	Description
IMergeable<TTarget, TTarget>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target and source records type.

UpdateWhenMatchedAndThenDelete<TTarget, TSource>(IMergeableSource<TTarget, TSource>, Expression<Func<TTarget, TSource, Boolean>>, Expression<Func<TTarget, TSource, TTarget>>, Expression<Func<TTarget, TSource, Boolean>>)

IMPORTANT: This operation supported only by Oracle Database. Adds new update with delete operation to merge and returns new merge command with added operation. This operation updates record in target table using user-defined values for target columns for each record that was matched in source and target and passes filtering with specified predicate, if it wasn't processed by previous operations. After that it removes updated records if they matched by delete predicate.

Declaration

public static IMergeable<TTarget, TSource> UpdateWhenMatchedAndThenDelete<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge, Expression<Func<TTarget, TSource, bool>> searchCondition, Expression<Func<TTarget, TSource, TTarget>> setter, Expression<Func<TTarget, TSource, bool>> deleteCondition)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.
Expression<Func<TTarget, TSource, System.Boolean>>	searchCondition	Update execution condition over target and source records.
Expression<Func<TTarget, TSource, TTarget>>	setter	Update record expression using target and source records. Expression should be a call to target record constructor with field/properties initializers to be recognized by API.
Expression<Func<TTarget, TSource, System.Boolean>>	deleteCondition	Delete execution condition over updated target and source records.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

UpdateWhenMatchedThenDelete<TTarget>(IMergeableSource<TTarget, TTarget>, Expression<Func<TTarget, TTarget, Boolean>>)

IMPORTANT: This operation supported only by Oracle Database. Adds new update with delete operation to merge and returns new merge command with added operation. This operation updates record in target table using data from the same fields of source record for each record that was matched in source and target, if it wasn't processed by previous operations. After that it removes updated records if they are matched by delete predicate.

Declaration

public static IMergeable<TTarget, TTarget> UpdateWhenMatchedThenDelete<TTarget>(this IMergeableSource<TTarget, TTarget> merge, Expression<Func<TTarget, TTarget, bool>> deleteCondition)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TTarget>	merge	Merge command builder interface.
Expression<Func<TTarget, TTarget, System.Boolean>>	deleteCondition	Delete execution condition over updated target and source records.

Returns

Type	Description
IMergeable<TTarget, TTarget>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target and source records type.

UpdateWhenMatchedThenDelete<TTarget, TSource>(IMergeableSource<TTarget, TSource>, Expression<Func<TTarget, TSource, TTarget>>, Expression<Func<TTarget, TSource, Boolean>>)

IMPORTANT: This operation supported only by Oracle Database. Adds new update with delete operation to merge and returns new merge command with added operation. This operation updates record in target table using user-defined values for target columns for each record that was matched in source and target, if it wasn't processed by previous operations. After that it removes updated records if they matched by delete predicate.

Declaration

public static IMergeable<TTarget, TSource> UpdateWhenMatchedThenDelete<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge, Expression<Func<TTarget, TSource, TTarget>> setter, Expression<Func<TTarget, TSource, bool>> deleteCondition)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.
Expression<Func<TTarget, TSource, TTarget>>	setter	Update record expression using target and source records. Expression should be a call to target record constructor with field/properties initializers to be recognized by API.
Expression<Func<TTarget, TSource, System.Boolean>>	deleteCondition	Delete execution condition over updated target and source records.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

UpdateWhenNotMatchedBySource<TTarget, TSource>(IMergeableSource<TTarget, TSource>, Expression<Func<TTarget, TTarget>>)

IMPORTANT: This operation supported only by Microsoft SQL Server. Adds new update by source operation to merge and returns new merge command with added operation. This operation updates record in target table for each record that was matched only in target using user-defined values for target columns, if it wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TSource> UpdateWhenNotMatchedBySource<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge, Expression<Func<TTarget, TTarget>> setter)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.
Expression<Func<TTarget, TTarget>>	setter	Update record expression using target record. Expression should be a call to target record constructor with field/properties initializers to be recognized by API.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

UpdateWhenNotMatchedBySourceAnd<TTarget, TSource>(IMergeableSource<TTarget, TSource>, Expression<Func<TTarget, Boolean>>, Expression<Func<TTarget, TTarget>>)

IMPORTANT: This operation supported only by Microsoft SQL Server. Adds new update by source operation to merge and returns new merge command with added operation. This operation updates record in target table for each record that was matched only in target using user-defined values for target columns, if it passed filtering by operation predicate and wasn't processed by previous operations.

Declaration

public static IMergeable<TTarget, TSource> UpdateWhenNotMatchedBySourceAnd<TTarget, TSource>(this IMergeableSource<TTarget, TSource> merge, Expression<Func<TTarget, bool>> searchCondition, Expression<Func<TTarget, TTarget>> setter)

Parameters

Type	Name	Description
IMergeableSource<TTarget, TSource>	merge	Merge command builder interface.
Expression<Func<TTarget, System.Boolean>>	searchCondition	Operation execution condition over target record.
Expression<Func<TTarget, TTarget>>	setter	Update record expression using target record. Expression should be a call to target record constructor with field/properties initializers to be recognized by API.

Returns

Type	Description
IMergeable<TTarget, TSource>	Returns new merge command builder with new operation.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

UpdateWithOutput<T>(IQueryable<T>, Expression<Func<T, T>>)

Executes update operation using source query as record filter.

Declaration

public static IEnumerable<UpdateOutput<T>> UpdateWithOutput<T>(this IQueryable<T> source, Expression<Func<T, T>> setter)

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
IEnumerable<UpdateOutput<T>>	Deleted and inserted values for every record updated.

Type Parameters

Name	Description
T	Updated table record type.

Remarks

Database support:

UpdateWithOutput<T>(IUpdatable<T>)

Executes update operation using source query as record filter.

Declaration

public static IEnumerable<UpdateOutput<T>> UpdateWithOutput<T>(this IUpdatable<T> source)

Parameters

Type	Name	Description
IUpdatable<T>	source	Source data query.

Returns

Type	Description
IEnumerable<UpdateOutput<T>>	Deleted and inserted values for every record updated.

Type Parameters

Name	Description
T	Updated table record type.

Remarks

Database support:

UpdateWithOutput<T, TOutput>(IQueryable<T>, Expression<Func<T, T>>, Expression<Func<T, T, TOutput>>)

Executes update operation using source query as record filter.

Declaration

public static IEnumerable<TOutput> UpdateWithOutput<T, TOutput>(this IQueryable<T> source, Expression<Func<T, T>> setter, Expression<Func<T, T, TOutput>> outputExpression)

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.
Expression<Func<T, T, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (T deleted, T inserted). Expression supports only record new expression with field initializers.

Returns

Type	Description
IEnumerable<TOutput>	Output values from the update statement.

Type Parameters

Name	Description
T	Updated table record type.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutput<TSource, TTarget>(IQueryable<TSource>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget>>)

Executes update-from-source operation against target table.

Declaration

public static IEnumerable<UpdateOutput<TTarget>> UpdateWithOutput<TSource, TTarget>(this IQueryable<TSource> source, Expression<Func<TSource, TTarget>> target, Expression<Func<TSource, TTarget>> setter)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TTarget>>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
IEnumerable<UpdateOutput<TTarget>>	Deleted and inserted values for every record updated.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

Remarks

Database support:

UpdateWithOutput<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>)

Executes update-from-source operation against target table.

Declaration

public static IEnumerable<UpdateOutput<TTarget>> UpdateWithOutput<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter)
    where TTarget : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.

Returns

Type	Description
IEnumerable<UpdateOutput<TTarget>>	Deleted and inserted values for every record updated.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

Remarks

Database support:

UpdateWithOutput<T, TOutput>(IUpdatable<T>, Expression<Func<T, T, TOutput>>)

Executes update operation using source query as record filter.

Declaration

public static IEnumerable<TOutput> UpdateWithOutput<T, TOutput>(this IUpdatable<T> source, Expression<Func<T, T, TOutput>> outputExpression)

Parameters

Type	Name	Description
IUpdatable<T>	source	Source data query.
Expression<Func<T, T, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (T deleted, T inserted). Expression supports only record new expression with field initializer.

Returns

Type	Description
IEnumerable<TOutput>	Output values from the update statement.

Type Parameters

Name	Description
T	Updated table record type.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutput<TSource, TTarget, TOutput>(IQueryable<TSource>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget, TTarget, TOutput>>)

Executes update-from-source operation against target table.

Declaration

public static IEnumerable<TOutput> UpdateWithOutput<TSource, TTarget, TOutput>(this IQueryable<TSource> source, Expression<Func<TSource, TTarget>> target, Expression<Func<TSource, TTarget>> setter, Expression<Func<TSource, TTarget, TTarget, TOutput>> outputExpression)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TTarget>>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
Expression<Func<TSource, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (TSource source, TTarget deleted, TTarget inserted). Expression supports only record new expression with field initializers.

Returns

Type	Description
IEnumerable<TOutput>	Output values from the update statement.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutput<TSource, TTarget, TOutput>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget, TTarget, TOutput>>)

Executes update-from-source operation against target table.

Declaration

public static IEnumerable<TOutput> UpdateWithOutput<TSource, TTarget, TOutput>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, Expression<Func<TSource, TTarget, TTarget, TOutput>> outputExpression)
    where TTarget : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
Expression<Func<TSource, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (TSource source, TTarget deleted, TTarget inserted). Expression supports only record new expression with field initializers.

Returns

Type	Description
IEnumerable<TOutput>	Output values from the update statement.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputAsync<T>(IQueryable<T>, Expression<Func<T, T>>, CancellationToken)

Executes update operation using source query as record filter.

Declaration

public static Task<UpdateOutput<T>[]> UpdateWithOutputAsync<T>(this IQueryable<T> source, Expression<Func<T, T>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<UpdateOutput<T>[]>	Deleted and inserted values for every record updated.

Type Parameters

Name	Description
T	Updated table record type.

Remarks

Database support:

UpdateWithOutputAsync<T>(IUpdatable<T>, CancellationToken)

Executes update operation using source query as record filter.

Declaration

public static Task<UpdateOutput<T>[]> UpdateWithOutputAsync<T>(this IUpdatable<T> source, CancellationToken token = null)

Parameters

Type	Name	Description
IUpdatable<T>	source	Source data query.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<UpdateOutput<T>[]>	Deleted and inserted values for every record updated.

Type Parameters

Name	Description
T	Updated table record type.

Remarks

Database support:

UpdateWithOutputAsync<T, TOutput>(IQueryable<T>, Expression<Func<T, T>>, Expression<Func<T, T, TOutput>>, CancellationToken)

Executes update operation using source query as record filter.

Declaration

public static Task<TOutput[]> UpdateWithOutputAsync<T, TOutput>(this IQueryable<T> source, Expression<Func<T, T>> setter, Expression<Func<T, T, TOutput>> outputExpression, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.
Expression<Func<T, T, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (T deleted, T inserted). Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TOutput[]>	Output values from the update statement.

Type Parameters

Name	Description
T	Updated table record type.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputAsync<TSource, TTarget>(IQueryable<TSource>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget>>, CancellationToken)

Executes update-from-source operation against target table.

Declaration

public static Task<UpdateOutput<TTarget>[]> UpdateWithOutputAsync<TSource, TTarget>(this IQueryable<TSource> source, Expression<Func<TSource, TTarget>> target, Expression<Func<TSource, TTarget>> setter, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TTarget>>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<UpdateOutput<TTarget>[]>	Deleted and inserted values for every record updated.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

Remarks

Database support:

UpdateWithOutputAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, CancellationToken)

Executes update-from-source operation against target table.

Declaration

public static Task<UpdateOutput<TTarget>[]> UpdateWithOutputAsync<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, CancellationToken token = null)
    where TTarget : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<UpdateOutput<TTarget>[]>	Deleted and inserted values for every record updated.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

Remarks

Database support:

UpdateWithOutputAsync<T, TOutput>(IUpdatable<T>, Expression<Func<T, T, TOutput>>, CancellationToken)

Executes update operation using source query as record filter.

Declaration

public static Task<TOutput[]> UpdateWithOutputAsync<T, TOutput>(this IUpdatable<T> source, Expression<Func<T, T, TOutput>> outputExpression, CancellationToken token = null)

Parameters

Type	Name	Description
IUpdatable<T>	source	Source data query.
Expression<Func<T, T, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (T deleted, T inserted). Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TOutput[]>	Output values from the update statement.

Type Parameters

Name	Description
T	Updated table record type.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputAsync<TSource, TTarget, TOutput>(IQueryable<TSource>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget, TTarget, TOutput>>, CancellationToken)

Executes update-from-source operation against target table.

Declaration

public static Task<TOutput[]> UpdateWithOutputAsync<TSource, TTarget, TOutput>(this IQueryable<TSource> source, Expression<Func<TSource, TTarget>> target, Expression<Func<TSource, TTarget>> setter, Expression<Func<TSource, TTarget, TTarget, TOutput>> outputExpression, CancellationToken token = null)

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TTarget>>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
Expression<Func<TSource, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (TSource source, TTarget deleted, TTarget inserted). Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TOutput[]>	Output values from the update statement.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputAsync<TSource, TTarget, TOutput>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget, TTarget, TOutput>>, CancellationToken)

Executes update-from-source operation against target table.

Declaration

public static Task<TOutput[]> UpdateWithOutputAsync<TSource, TTarget, TOutput>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, Expression<Func<TSource, TTarget, TTarget, TOutput>> outputExpression, CancellationToken token = null)
    where TTarget : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
Expression<Func<TSource, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (TSource source, TTarget deleted, TTarget inserted). Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<TOutput[]>	Output values from the update statement.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputInto<T>(IQueryable<T>, Expression<Func<T, T>>, ITable<T>)

Executes update operation using source query as record filter.

Declaration

public static int UpdateWithOutputInto<T>(this IQueryable<T> source, Expression<Func<T, T>> setter, ITable<T> outputTable)
    where T : class

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.
ITable<T>	outputTable	Output table.

Returns

Type	Description
System.Int32	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.

Remarks

Database support:

UpdateWithOutputInto<T>(IUpdatable<T>, ITable<T>)

Executes update operation using source query as record filter.

Declaration

public static int UpdateWithOutputInto<T>(this IUpdatable<T> source, ITable<T> outputTable)
    where T : class

Parameters

Type	Name	Description
IUpdatable<T>	source	Source data query.
ITable<T>	outputTable	Output table.

Returns

Type	Description
System.Int32	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.

Remarks

Database support:

UpdateWithOutputInto<T, TOutput>(IQueryable<T>, Expression<Func<T, T>>, ITable<TOutput>, Expression<Func<T, T, TOutput>>)

Executes update operation using source query as record filter.

Declaration

public static int UpdateWithOutputInto<T, TOutput>(this IQueryable<T> source, Expression<Func<T, T>> setter, ITable<TOutput> outputTable, Expression<Func<T, T, TOutput>> outputExpression)
    where TOutput : class

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.
ITable<TOutput>	outputTable	Output table.
Expression<Func<T, T, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (T deleted, T inserted). Expression supports only record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputInto<TSource, TTarget>(IQueryable<TSource>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget>>, ITable<TTarget>)

Executes update-from-source operation against target table.

Declaration

public static int UpdateWithOutputInto<TSource, TTarget>(this IQueryable<TSource> source, Expression<Func<TSource, TTarget>> target, Expression<Func<TSource, TTarget>> setter, ITable<TTarget> outputTable)
    where TTarget : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TTarget>>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
ITable<TTarget>	outputTable	Output table.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

Remarks

Database support:

UpdateWithOutputInto<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, ITable<TTarget>)

Executes update-from-source operation against target table.

Declaration

public static int UpdateWithOutputInto<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, ITable<TTarget> outputTable)
    where TTarget : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
ITable<TTarget>	outputTable	Output table.

Returns

Type	Description
System.Int32	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

Remarks

Database support:

UpdateWithOutputInto<T, TOutput>(IUpdatable<T>, ITable<TOutput>, Expression<Func<T, T, TOutput>>)

Executes update operation using source query as record filter.

Declaration

public static int UpdateWithOutputInto<T, TOutput>(this IUpdatable<T> source, ITable<TOutput> outputTable, Expression<Func<T, T, TOutput>> outputExpression)
    where TOutput : class

Parameters

Type	Name	Description
IUpdatable<T>	source	Source data query.
ITable<TOutput>	outputTable	Output table.
Expression<Func<T, T, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (T deleted, T inserted). Expression supports only record new expression with field initializers.

Returns

Type	Description
System.Int32	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputInto<TSource, TTarget, TOutput>(IQueryable<TSource>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget>>, ITable<TOutput>, Expression<Func<TSource, TTarget, TTarget, TOutput>>)

Executes update-from-source operation against target table.

Declaration

public static int UpdateWithOutputInto<TSource, TTarget, TOutput>(this IQueryable<TSource> source, Expression<Func<TSource, TTarget>> target, Expression<Func<TSource, TTarget>> setter, ITable<TOutput> outputTable, Expression<Func<TSource, TTarget, TTarget, TOutput>> outputExpression)
    where TOutput : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TTarget>>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
ITable<TOutput>	outputTable	Output table.
Expression<Func<TSource, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (TSource source, TTarget deleted, TTarget inserted). Expression supports only record new expression with field initializers.

Returns

Type	Description
System.Int32	Output values from the update statement.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputInto<TSource, TTarget, TOutput>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, ITable<TOutput>, Expression<Func<TSource, TTarget, TTarget, TOutput>>)

Executes update-from-source operation against target table.

Declaration

public static int UpdateWithOutputInto<TSource, TTarget, TOutput>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, ITable<TOutput> outputTable, Expression<Func<TSource, TTarget, TTarget, TOutput>> outputExpression)
    where TTarget : class where TOutput : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
ITable<TOutput>	outputTable	Output table.
Expression<Func<TSource, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (TSource source, TTarget deleted, TTarget inserted). Expression supports only record new expression with field initializers.

Returns

Type	Description
System.Int32	Output values from the update statement.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputIntoAsync<T>(IQueryable<T>, Expression<Func<T, T>>, ITable<T>, CancellationToken)

Executes update operation using source query as record filter.

Declaration

public static Task<int> UpdateWithOutputIntoAsync<T>(this IQueryable<T> source, Expression<Func<T, T>> setter, ITable<T> outputTable, CancellationToken token = null)
    where T : class

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.
ITable<T>	outputTable	Output table.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.

Remarks

Database support:

UpdateWithOutputIntoAsync<T>(IUpdatable<T>, ITable<T>, CancellationToken)

Executes update operation using source query as record filter.

Declaration

public static Task<int> UpdateWithOutputIntoAsync<T>(this IUpdatable<T> source, ITable<T> outputTable, CancellationToken token = null)
    where T : class

Parameters

Type	Name	Description
IUpdatable<T>	source	Source data query.
ITable<T>	outputTable	Output table.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.

Remarks

Database support:

UpdateWithOutputIntoAsync<T, TOutput>(IQueryable<T>, Expression<Func<T, T>>, ITable<TOutput>, Expression<Func<T, T, TOutput>>, CancellationToken)

Executes update operation using source query as record filter.

Declaration

public static Task<int> UpdateWithOutputIntoAsync<T, TOutput>(this IQueryable<T> source, Expression<Func<T, T>> setter, ITable<TOutput> outputTable, Expression<Func<T, T, TOutput>> outputExpression, CancellationToken token = null)
    where TOutput : class

Parameters

Type	Name	Description
IQueryable<T>	source	Source data query.
Expression<Func<T, T>>	setter	Update expression. Uses updated record as parameter. Expression supports only target table record new expression with field initializers.
ITable<TOutput>	outputTable	Output table.
Expression<Func<T, T, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (T deleted, T inserted). Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputIntoAsync<TSource, TTarget>(IQueryable<TSource>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget>>, ITable<TTarget>, CancellationToken)

Executes update-from-source operation against target table.

Declaration

public static Task<int> UpdateWithOutputIntoAsync<TSource, TTarget>(this IQueryable<TSource> source, Expression<Func<TSource, TTarget>> target, Expression<Func<TSource, TTarget>> setter, ITable<TTarget> outputTable, CancellationToken token = null)
    where TTarget : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TTarget>>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
ITable<TTarget>	outputTable	Output table.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

Remarks

Database support:

UpdateWithOutputIntoAsync<TSource, TTarget>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, ITable<TTarget>, CancellationToken)

Executes update-from-source operation against target table.

Declaration

public static Task<int> UpdateWithOutputIntoAsync<TSource, TTarget>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, ITable<TTarget> outputTable, CancellationToken token = null)
    where TTarget : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
ITable<TTarget>	outputTable	Output table.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of affected records.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.

Remarks

Database support:

UpdateWithOutputIntoAsync<T, TOutput>(IUpdatable<T>, ITable<TOutput>, Expression<Func<T, T, TOutput>>, CancellationToken)

Executes update operation using source query as record filter.

Declaration

public static Task<int> UpdateWithOutputIntoAsync<T, TOutput>(this IUpdatable<T> source, ITable<TOutput> outputTable, Expression<Func<T, T, TOutput>> outputExpression, CancellationToken token = null)
    where TOutput : class

Parameters

Type	Name	Description
IUpdatable<T>	source	Source data query.
ITable<TOutput>	outputTable	Output table.
Expression<Func<T, T, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (T deleted, T inserted). Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Number of updated records.

Type Parameters

Name	Description
T	Updated table record type.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputIntoAsync<TSource, TTarget, TOutput>(IQueryable<TSource>, Expression<Func<TSource, TTarget>>, Expression<Func<TSource, TTarget>>, ITable<TOutput>, Expression<Func<TSource, TTarget, TTarget, TOutput>>, CancellationToken)

Executes update-from-source operation against target table.

Declaration

public static Task<int> UpdateWithOutputIntoAsync<TSource, TTarget, TOutput>(this IQueryable<TSource> source, Expression<Func<TSource, TTarget>> target, Expression<Func<TSource, TTarget>> setter, ITable<TOutput> outputTable, Expression<Func<TSource, TTarget, TTarget, TOutput>> outputExpression, CancellationToken token = null)
    where TOutput : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
Expression<Func<TSource, TTarget>>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
ITable<TOutput>	outputTable	Output table.
Expression<Func<TSource, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (TSource source, TTarget deleted, TTarget inserted). Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Output values from the update statement.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.
TOutput	Output table record type.

Remarks

Database support:

UpdateWithOutputIntoAsync<TSource, TTarget, TOutput>(IQueryable<TSource>, ITable<TTarget>, Expression<Func<TSource, TTarget>>, ITable<TOutput>, Expression<Func<TSource, TTarget, TTarget, TOutput>>, CancellationToken)

Executes update-from-source operation against target table.

Declaration

public static Task<int> UpdateWithOutputIntoAsync<TSource, TTarget, TOutput>(this IQueryable<TSource> source, ITable<TTarget> target, Expression<Func<TSource, TTarget>> setter, ITable<TOutput> outputTable, Expression<Func<TSource, TTarget, TTarget, TOutput>> outputExpression, CancellationToken token = null)
    where TTarget : class where TOutput : class

Parameters

Type	Name	Description
IQueryable<TSource>	source	Source data query.
ITable<TTarget>	target	Target table.
Expression<Func<TSource, TTarget>>	setter	Update expression. Uses record from source query as parameter. Expression supports only target table record new expression with field initializers.
ITable<TOutput>	outputTable	Output table.
Expression<Func<TSource, TTarget, TTarget, TOutput>>	outputExpression	Output record constructor expression. Parameters passed are as follows: (TSource source, TTarget deleted, TTarget inserted). Expression supports only record new expression with field initializers.
CancellationToken	token	Optional asynchronous operation cancellation token.

Returns

Type	Description
Task<System.Int32>	Output values from the update statement.

Type Parameters

Name	Description
TSource	Source query record type.
TTarget	Target table mapping class.
TOutput	Output table record type.

Remarks

Database support:

Using<TTarget, TSource>(IMergeableUsing<TTarget>, IEnumerable<TSource>)

Adds source collection to merge command definition.

Declaration

public static IMergeableOn<TTarget, TSource> Using<TTarget, TSource>(this IMergeableUsing<TTarget> merge, IEnumerable<TSource> source)

Parameters

Type	Name	Description
IMergeableUsing<TTarget>	merge	Merge command builder.
IEnumerable<TSource>	source	Source data collection.

Returns

Type	Description
IMergeableOn<TTarget, TSource>	Returns merge command builder with source and target set.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

Using<TTarget, TSource>(IMergeableUsing<TTarget>, IQueryable<TSource>)

Adds source query to merge command definition.

Declaration

public static IMergeableOn<TTarget, TSource> Using<TTarget, TSource>(this IMergeableUsing<TTarget> merge, IQueryable<TSource> source)

Parameters

Type	Name	Description
IMergeableUsing<TTarget>	merge	Merge command builder.
IQueryable<TSource>	source	Source data query.

Returns

Type	Description
IMergeableOn<TTarget, TSource>	Returns merge command builder with source and target set.

Type Parameters

Name	Description
TTarget	Target record type.
TSource	Source record type.

UsingTarget<TTarget>(IMergeableUsing<TTarget>)

Sets target table as merge command source.

Declaration

public static IMergeableOn<TTarget, TTarget> UsingTarget<TTarget>(this IMergeableUsing<TTarget> merge)

Parameters

Type	Name	Description
IMergeableUsing<TTarget>	merge	Merge command builder.

Returns

Type	Description
IMergeableOn<TTarget, TTarget>	Returns merge command builder with source and target set.

Type Parameters

Name	Description
TTarget	Target record type.

Value<T, TV>(ITable<T>, Expression<Func<T, TV>>, TV)

Starts insert operation LINQ query definition from field setter expression.

Declaration

public static IValueInsertable<T> Value<T, TV>(this ITable<T> source, Expression<Func<T, TV>> field, TV value)

Parameters

Type	Name	Description
ITable<T>	source	Source table to insert to.
Expression<Func<T, TV>>	field	Setter field selector expression.
TV	value	Setter field value.

Returns

Type	Description
IValueInsertable<T>	Insert query.

Type Parameters

Name	Description
T	Target table record type.
TV	Setter field type.

Value<T, TV>(ITable<T>, Expression<Func<T, TV>>, Expression<Func<TV>>)

Starts insert operation LINQ query definition from field setter expression.

Declaration

public static IValueInsertable<T> Value<T, TV>(this ITable<T> source, Expression<Func<T, TV>> field, Expression<Func<TV>> value)

Parameters

Type	Name	Description
ITable<T>	source	Source table to insert to.
Expression<Func<T, TV>>	field	Setter field selector expression.
Expression<Func<TV>>	value	Setter field value expression.

Returns

Type	Description
IValueInsertable<T>	Insert query.

Type Parameters

Name	Description
T	Target table record type.
TV	Setter field type.

Value<T, TV>(IValueInsertable<T>, Expression<Func<T, TV>>, TV)

Add field setter to insert operation LINQ query.

Declaration

public static IValueInsertable<T> Value<T, TV>(this IValueInsertable<T> source, Expression<Func<T, TV>> field, TV value)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.
Expression<Func<T, TV>>	field	Setter field selector expression.
TV	value	Setter field value.

Returns

Type	Description
IValueInsertable<T>	Insert query.

Type Parameters

Name	Description
T	Target table record type.
TV	Setter field type.

Value<T, TV>(IValueInsertable<T>, Expression<Func<T, TV>>, Expression<Func<TV>>)

Add field setter to insert operation LINQ query.

Declaration

public static IValueInsertable<T> Value<T, TV>(this IValueInsertable<T> source, Expression<Func<T, TV>> field, Expression<Func<TV>> value)

Parameters

Type	Name	Description
IValueInsertable<T>	source	Insert query.
Expression<Func<T, TV>>	field	Setter field selector expression.
Expression<Func<TV>>	value	Setter field value expression.

Returns

Type	Description
IValueInsertable<T>	Insert query.

Type Parameters

Name	Description
T	Target table record type.
TV	Setter field type.

Value<TSource, TTarget, TValue>(ISelectInsertable<TSource, TTarget>, Expression<Func<TTarget, TValue>>, TValue)

Add field setter to insert operation LINQ query.

Declaration

public static ISelectInsertable<TSource, TTarget> Value<TSource, TTarget, TValue>(this ISelectInsertable<TSource, TTarget> source, Expression<Func<TTarget, TValue>> field, TValue value)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
Expression<Func<TTarget, TValue>>	field	Setter field selector expression.
TValue	value	Setter field value.

Returns

Type	Description
ISelectInsertable<TSource, TTarget>	Insert query.

Type Parameters

Name	Description
TSource	Source record type.
TTarget	Target record type
TValue	Field type.

Value<TSource, TTarget, TValue>(ISelectInsertable<TSource, TTarget>, Expression<Func<TTarget, TValue>>, Expression<Func<TSource, TValue>>)

Add field setter to insert operation LINQ query.

Declaration

public static ISelectInsertable<TSource, TTarget> Value<TSource, TTarget, TValue>(this ISelectInsertable<TSource, TTarget> source, Expression<Func<TTarget, TValue>> field, Expression<Func<TSource, TValue>> value)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
Expression<Func<TTarget, TValue>>	field	Setter field selector expression.
Expression<Func<TSource, TValue>>	value	Setter field value expression. Accepts source record as parameter.

Returns

Type	Description
ISelectInsertable<TSource, TTarget>	Insert query.

Type Parameters

Name	Description
TSource	Source record type.
TTarget	Target record type
TValue	Field type.

Value<TSource, TTarget, TValue>(ISelectInsertable<TSource, TTarget>, Expression<Func<TTarget, TValue>>, Expression<Func<TValue>>)

Add field setter to insert operation LINQ query.

Declaration

public static ISelectInsertable<TSource, TTarget> Value<TSource, TTarget, TValue>(this ISelectInsertable<TSource, TTarget> source, Expression<Func<TTarget, TValue>> field, Expression<Func<TValue>> value)

Parameters

Type	Name	Description
ISelectInsertable<TSource, TTarget>	source	Insert query.
Expression<Func<TTarget, TValue>>	field	Setter field selector expression.
Expression<Func<TValue>>	value	Setter field value expression.

Returns

Type	Description
ISelectInsertable<TSource, TTarget>	Insert query.

Type Parameters

Name	Description
TSource	Source record type.
TTarget	Target record type
TValue	Field type.

With<TSource>(ITable<TSource>, String)

Adds a table hint to a table in generated query.

Declaration

public static ITable<TSource> With<TSource>(this ITable<TSource> table, string hint)

Parameters

Type	Name	Description
ITable<TSource>	table	Table-like query source.
System.String	hint	SQL text, added as a database specific hint to generated query.

Returns

Type	Description
ITable<TSource>	Table-like query source with table hints.

Type Parameters

Name	Description
TSource	Table record mapping class.

WithTableExpression<T>(ITable<T>, String)

Replaces access to a table in generated query with SQL expression. Example below adds hint to a table. Also see With<TSource>(ITable<TSource>, String) method.

var tableWithHint = db.Table.WithTableExpression("{0} {1} with (UpdLock)");

Declaration

public static ITable<T> WithTableExpression<T>(this ITable<T> table, string expression)

Parameters

Type	Name	Description
ITable<T>	table	Table-like query source.
System.String	expression	SQL template to use instead of table name. Template supports two parameters: - {0} original table name; - {1} table alias.

Returns

Type	Description
ITable<T>	Table-like query source with new table source expression.

Type Parameters

Name	Description
T	Table record mapping class.