Class DB2SqlBuilderBase
- Namespace
- LinqToDB.Internal.DataProvider.DB2
- Assembly
- linq2db.dll
public abstract class DB2SqlBuilderBase : BasicSqlBuilder<DB2Options>, ISqlBuilder
- Inheritance
-
objectDB2SqlBuilderBase
- Implements
- Derived
- Inherited Members
- Extension Methods
Constructors
DB2SqlBuilderBase(IDataProvider?, MappingSchema, DataOptions, ISqlOptimizer, SqlProviderFlags)
protected DB2SqlBuilderBase(IDataProvider? provider, MappingSchema mappingSchema, DataOptions dataOptions, ISqlOptimizer sqlOptimizer, SqlProviderFlags sqlProviderFlags)
Parameters
providerIDataProvidermappingSchemaMappingSchemadataOptionsDataOptionssqlOptimizerISqlOptimizersqlProviderFlagsSqlProviderFlags
DB2SqlBuilderBase(BasicSqlBuilder)
protected DB2SqlBuilderBase(BasicSqlBuilder parentBuilder)
Parameters
parentBuilderBasicSqlBuilder
Properties
ConcatStyle
SQL-emit shape for SqlConcatExpression. Defaults to Plus; override per provider.
protected override BasicSqlBuilder.ConcatBuildStyle ConcatStyle { get; }
Property Value
CteFirst
Identifies CTE clause location:
public override bool CteFirst { get; }
Property Value
OffsetFirst
protected override bool OffsetFirst { get; }
Property Value
ParameterCastMaxLength
Length above which GetValueBasedParameterCastType(SqlParameter) renders no cast, or null for no limit.
protected override int? ParameterCastMaxLength { get; }
Property Value
- int?
ParameterCastResolvesUndefinedType
Whether GetValueBasedParameterCastType(SqlParameter) resolves an undefined parameter type through the mapping schema before inspecting the value.
protected override bool ParameterCastResolvesUndefinedType { get; }
Property Value
Version
protected abstract DB2Version Version { get; }
Property Value
Methods
BuildCommand(SqlStatement, int)
protected override void BuildCommand(SqlStatement statement, int commandNumber)
Parameters
statementSqlStatementcommandNumberint
BuildCreateTableCommand(SqlTable)
protected override void BuildCreateTableCommand(SqlTable table)
Parameters
tableSqlTable
BuildCreateTableIdentityAttribute1(SqlField)
protected override void BuildCreateTableIdentityAttribute1(SqlField field)
Parameters
fieldSqlField
BuildCreateTableNullAttribute(SqlField, DefaultNullable)
protected override void BuildCreateTableNullAttribute(SqlField field, DefaultNullable defaultNullable)
Parameters
fieldSqlFielddefaultNullableDefaultNullable
BuildCreateTablePrimaryKey(SqlCreateTableStatement, string, IEnumerable<string>)
protected override void BuildCreateTablePrimaryKey(SqlCreateTableStatement createTable, string pkName, IEnumerable<string> fieldNames)
Parameters
createTableSqlCreateTableStatementpkNamestringfieldNamesIEnumerable<string>
BuildCreateTableStatement(SqlCreateTableStatement)
protected override void BuildCreateTableStatement(SqlCreateTableStatement createTable)
Parameters
createTableSqlCreateTableStatement
BuildDataTypeFromDataType(DbDataType, bool, bool)
protected override void BuildDataTypeFromDataType(DbDataType type, bool forCreateTable, bool canBeNull)
Parameters
typeDbDataTypeforCreateTableboolcanBeNullboolType could store
NULLvalues (could be used for column table type generation or for databases with explicit typee nullability like ClickHouse).
BuildDropTableStatement(SqlDropTableStatement)
protected override void BuildDropTableStatement(SqlDropTableStatement dropTable)
Parameters
dropTableSqlDropTableStatement
BuildEmptyInsert(SqlInsertClause)
protected override void BuildEmptyInsert(SqlInsertClause insertClause)
Parameters
insertClauseSqlInsertClause
BuildEndCreateTableStatement(SqlCreateTableStatement)
protected override void BuildEndCreateTableStatement(SqlCreateTableStatement createTable)
Parameters
createTableSqlCreateTableStatement
BuildGetIdentity(SqlInsertClause)
protected override void BuildGetIdentity(SqlInsertClause insertClause)
Parameters
insertClauseSqlInsertClause
BuildInsertOrUpdateQuery(SqlInsertOrUpdateStatement)
protected override void BuildInsertOrUpdateQuery(SqlInsertOrUpdateStatement insertOrUpdate)
Parameters
insertOrUpdateSqlInsertOrUpdateStatement
BuildObjectName(StringBuilder, SqlObjectName, ConvertType, bool, TableOptions, bool)
Writes database object name into provided StringBuilder instance.
public override StringBuilder BuildObjectName(StringBuilder sb, SqlObjectName name, ConvertType objectType = ConvertType.NameToQueryTable, bool escape = true, TableOptions tableOptions = TableOptions.NotSet, bool withoutSuffix = false)
Parameters
sbStringBuilderString builder for generated object name.
nameSqlObjectNameName of database object (e.g. table, view, procedure or function).
objectTypeConvertTypeType of database object, used to select proper name converter.
escapeboolIf true, apply required escaping to name components. Must be true except rare cases when escaping is not needed.
tableOptionsTableOptionsTable options if called for table. Used to properly generate names for temporary tables.
withoutSuffixboolIf object name have suffix, which could be detached from main name, this parameter disables suffix generation (enables generation of only main name part).
Returns
- StringBuilder
sbparameter value.
BuildSelectClause(SelectQuery)
protected override void BuildSelectClause(SelectQuery selectQuery)
Parameters
selectQuerySelectQuery
BuildSql(int, SqlStatement, StringBuilder, OptimizationContext, int, ColumnAliasMode, NullabilityContext?)
protected override void BuildSql(int commandNumber, SqlStatement statement, StringBuilder sb, OptimizationContext optimizationContext, int indent, BasicSqlBuilder.ColumnAliasMode aliasMode, NullabilityContext? nullabilityContext)
Parameters
commandNumberintstatementSqlStatementsbStringBuilderoptimizationContextOptimizationContextindentintaliasModeBasicSqlBuilder.ColumnAliasModenullabilityContextNullabilityContext
BuildSqlExtendedFunction(SqlExtendedFunction)
protected override void BuildSqlExtendedFunction(SqlExtendedFunction extendedFunction)
Parameters
extendedFunctionSqlExtendedFunction
BuildTruncateTableStatement(SqlTruncateTableStatement)
protected override void BuildTruncateTableStatement(SqlTruncateTableStatement truncateTable)
Parameters
truncateTableSqlTruncateTableStatement
CommandCount(SqlStatement)
public override int CommandCount(SqlStatement statement)
Parameters
statementSqlStatement
Returns
Convert(StringBuilder, string, ConvertType)
public override StringBuilder Convert(StringBuilder sb, string value, ConvertType convertType)
Parameters
sbStringBuildervaluestringconvertTypeConvertType
Returns
GetParameterCastType(SqlParameter)
Type used to render a SqlParameterCastExpression over parameter, or
null to render the parameter bare. Defaults to the parameter's own type; providers
that must state exact facets override it, typically via GetValueBasedParameterCastType(SqlParameter).
protected override DbDataType? GetParameterCastType(SqlParameter parameter)
Parameters
parameterSqlParameter
Returns
GetProviderTypeName(IDataContext, DbParameter)
protected override string? GetProviderTypeName(IDataContext dataContext, DbParameter parameter)
Parameters
dataContextIDataContextparameterDbParameter
Returns
GetWindowNullsPlacement(SqlExtendedFunction)
Returns where the IGNORE NULLS modifier is emitted for the given value/offset window function.
Defaults to AfterClose; providers override for non-standard placement.
protected override BasicSqlBuilder.WindowNullsPlacement GetWindowNullsPlacement(SqlExtendedFunction extendedFunction)
Parameters
extendedFunctionSqlExtendedFunction
Returns
IsSqlValuesTableValueTypeRequired(SqlValuesTable, IReadOnlyList<List<ISqlExpression>>, int, int)
Checks that value in specific row and column in enumerable source requires type information generation.
protected override bool IsSqlValuesTableValueTypeRequired(SqlValuesTable source, IReadOnlyList<List<ISqlExpression>> rows, int row, int column)
Parameters
sourceSqlValuesTableMerge source table.
rowsIReadOnlyList<List<ISqlExpression>>Merge source data.
rowintIndex of data row to check. Could contain -1 to indicate that this is a check for empty source NULL value.
columnintIndex of data column to check in row.
Returns
- bool
Returns true, if generated SQL should include type information for value at specified position, otherwise false returned.
LimitFormat(SelectQuery)
protected override string? LimitFormat(SelectQuery selectQuery)
Parameters
selectQuerySelectQuery
Returns
OffsetFormat(SelectQuery)
protected override string OffsetFormat(SelectQuery selectQuery)
Parameters
selectQuerySelectQuery