Table of Contents

Class DB2SqlBuilderBase

Namespace
LinqToDB.Internal.DataProvider.DB2
Assembly
linq2db.dll
public abstract class DB2SqlBuilderBase : BasicSqlBuilder<DB2Options>, ISqlBuilder
Inheritance
object
DB2SqlBuilderBase
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

provider IDataProvider
mappingSchema MappingSchema
dataOptions DataOptions
sqlOptimizer ISqlOptimizer
sqlProviderFlags SqlProviderFlags

DB2SqlBuilderBase(BasicSqlBuilder)

protected DB2SqlBuilderBase(BasicSqlBuilder parentBuilder)

Parameters

parentBuilder BasicSqlBuilder

Properties

ConcatStyle

SQL-emit shape for SqlConcatExpression. Defaults to Plus; override per provider.

protected override BasicSqlBuilder.ConcatBuildStyle ConcatStyle { get; }

Property Value

BasicSqlBuilder.ConcatBuildStyle

CteFirst

Identifies CTE clause location:

  • true (default): WITH clause goes first in query
  • false: WITH clause goes before SELECT
public override bool CteFirst { get; }

Property Value

bool

OffsetFirst

protected override bool OffsetFirst { get; }

Property Value

bool

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

bool

Version

protected abstract DB2Version Version { get; }

Property Value

DB2Version

Methods

BuildCommand(SqlStatement, int)

protected override void BuildCommand(SqlStatement statement, int commandNumber)

Parameters

statement SqlStatement
commandNumber int

BuildCreateTableCommand(SqlTable)

protected override void BuildCreateTableCommand(SqlTable table)

Parameters

table SqlTable

BuildCreateTableIdentityAttribute1(SqlField)

protected override void BuildCreateTableIdentityAttribute1(SqlField field)

Parameters

field SqlField

BuildCreateTableNullAttribute(SqlField, DefaultNullable)

protected override void BuildCreateTableNullAttribute(SqlField field, DefaultNullable defaultNullable)

Parameters

field SqlField
defaultNullable DefaultNullable

BuildCreateTablePrimaryKey(SqlCreateTableStatement, string, IEnumerable<string>)

protected override void BuildCreateTablePrimaryKey(SqlCreateTableStatement createTable, string pkName, IEnumerable<string> fieldNames)

Parameters

createTable SqlCreateTableStatement
pkName string
fieldNames IEnumerable<string>

BuildCreateTableStatement(SqlCreateTableStatement)

protected override void BuildCreateTableStatement(SqlCreateTableStatement createTable)

Parameters

createTable SqlCreateTableStatement

BuildDataTypeFromDataType(DbDataType, bool, bool)

protected override void BuildDataTypeFromDataType(DbDataType type, bool forCreateTable, bool canBeNull)

Parameters

type DbDataType
forCreateTable bool
canBeNull bool

Type could store NULL values (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

dropTable SqlDropTableStatement

BuildEmptyInsert(SqlInsertClause)

protected override void BuildEmptyInsert(SqlInsertClause insertClause)

Parameters

insertClause SqlInsertClause

BuildEndCreateTableStatement(SqlCreateTableStatement)

protected override void BuildEndCreateTableStatement(SqlCreateTableStatement createTable)

Parameters

createTable SqlCreateTableStatement

BuildGetIdentity(SqlInsertClause)

protected override void BuildGetIdentity(SqlInsertClause insertClause)

Parameters

insertClause SqlInsertClause

BuildInsertOrUpdateQuery(SqlInsertOrUpdateStatement)

protected override void BuildInsertOrUpdateQuery(SqlInsertOrUpdateStatement insertOrUpdate)

Parameters

insertOrUpdate SqlInsertOrUpdateStatement

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

sb StringBuilder

String builder for generated object name.

name SqlObjectName

Name of database object (e.g. table, view, procedure or function).

objectType ConvertType

Type of database object, used to select proper name converter.

escape bool

If true, apply required escaping to name components. Must be true except rare cases when escaping is not needed.

tableOptions TableOptions

Table options if called for table. Used to properly generate names for temporary tables.

withoutSuffix bool

If 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

sb parameter value.

BuildSelectClause(SelectQuery)

protected override void BuildSelectClause(SelectQuery selectQuery)

Parameters

selectQuery SelectQuery

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

commandNumber int
statement SqlStatement
sb StringBuilder
optimizationContext OptimizationContext
indent int
aliasMode BasicSqlBuilder.ColumnAliasMode
nullabilityContext NullabilityContext

BuildSqlExtendedFunction(SqlExtendedFunction)

protected override void BuildSqlExtendedFunction(SqlExtendedFunction extendedFunction)

Parameters

extendedFunction SqlExtendedFunction

BuildTruncateTableStatement(SqlTruncateTableStatement)

protected override void BuildTruncateTableStatement(SqlTruncateTableStatement truncateTable)

Parameters

truncateTable SqlTruncateTableStatement

CommandCount(SqlStatement)

public override int CommandCount(SqlStatement statement)

Parameters

statement SqlStatement

Returns

int

Convert(StringBuilder, string, ConvertType)

public override StringBuilder Convert(StringBuilder sb, string value, ConvertType convertType)

Parameters

sb StringBuilder
value string
convertType ConvertType

Returns

StringBuilder

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

parameter SqlParameter

Returns

DbDataType?

GetProviderTypeName(IDataContext, DbParameter)

protected override string? GetProviderTypeName(IDataContext dataContext, DbParameter parameter)

Parameters

dataContext IDataContext
parameter DbParameter

Returns

string

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

extendedFunction SqlExtendedFunction

Returns

BasicSqlBuilder.WindowNullsPlacement

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

source SqlValuesTable

Merge source table.

rows IReadOnlyList<List<ISqlExpression>>

Merge source data.

row int

Index of data row to check. Could contain -1 to indicate that this is a check for empty source NULL value.

column int

Index 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

selectQuery SelectQuery

Returns

string

OffsetFormat(SelectQuery)

protected override string OffsetFormat(SelectQuery selectQuery)

Parameters

selectQuery SelectQuery

Returns

string