Package org.apache.calcite.schema.impl

Class ModifiableViewTable.ModifiableViewTableInitializerExpressionFactory

java.lang.Object

org.apache.calcite.sql2rel.NullInitializerExpressionFactory

org.apache.calcite.schema.impl.ModifiableViewTable.ModifiableViewTableInitializerExpressionFactory

All Implemented Interfaces:

InitializerExpressionFactory

Enclosing class:

ModifiableViewTable

private class ModifiableViewTable.ModifiableViewTableInitializerExpressionFactory
extends NullInitializerExpressionFactory

Initializes columns based on the view constraint.

Field Summary

Fields

Modifier and Type	Field	Description
private com.google.common.collect.ImmutableMap<java.lang.Integer,RexNode>	projectMap

Fields inherited from class org.apache.calcite.sql2rel.NullInitializerExpressionFactory

INSTANCE

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ModifiableViewTableInitializerExpressionFactory()

Method Summary

Modifier and Type	Method	Description
ColumnStrategy	generationStrategy(RelOptTable table, int iColumn)	Returns how a column is populated.
RexNode	newAttributeInitializer(RelDataType type, SqlFunction constructor, int iAttribute, java.util.List<RexNode> constructorArgs, InitializerContext context)	Creates an expression which evaluates to the initializer expression for a particular attribute of a structured type.
RexNode	newColumnDefaultValue(RelOptTable table, int iColumn, InitializerContext context)	Creates an expression which evaluates to the default value for a particular column.

Methods inherited from class org.apache.calcite.sql2rel.NullInitializerExpressionFactory

isGeneratedAlways

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

projectMap

private final com.google.common.collect.ImmutableMap<java.lang.Integer,RexNode> projectMap

Constructor Detail

ModifiableViewTableInitializerExpressionFactory

private ModifiableViewTableInitializerExpressionFactory()

Method Detail

generationStrategy

public ColumnStrategy generationStrategy(RelOptTable table,
                                         int iColumn)

Description copied from interface: InitializerExpressionFactory

Returns how a column is populated.

Specified by:

generationStrategy in interface InitializerExpressionFactory

Overrides:

generationStrategy in class NullInitializerExpressionFactory

Parameters:

table - the table containing the column

iColumn - the 0-based offset of the column in the table

Returns:

generation strategy, never null

See Also:

RelOptTable.getColumnStrategies()

newColumnDefaultValue

public RexNode newColumnDefaultValue(RelOptTable table,
                                     int iColumn,
                                     InitializerContext context)

Description copied from interface: InitializerExpressionFactory

Creates an expression which evaluates to the default value for a particular column.

Specified by:

newColumnDefaultValue in interface InitializerExpressionFactory

Overrides:

newColumnDefaultValue in class NullInitializerExpressionFactory

Parameters:

table - the table containing the column

iColumn - the 0-based offset of the column in the table

context - Context for creating the expression

Returns:

default value expression

newAttributeInitializer

public RexNode newAttributeInitializer(RelDataType type,
                                       SqlFunction constructor,
                                       int iAttribute,
                                       java.util.List<RexNode> constructorArgs,
                                       InitializerContext context)

Description copied from interface: InitializerExpressionFactory

Creates an expression which evaluates to the initializer expression for a particular attribute of a structured type.

Specified by:

newAttributeInitializer in interface InitializerExpressionFactory

Overrides:

newAttributeInitializer in class NullInitializerExpressionFactory

Parameters:

type - the structured type

constructor - the constructor invoked to initialize the type

iAttribute - the 0-based offset of the attribute in the type

constructorArgs - arguments passed to the constructor invocation

context - Context for creating the expression

Returns:

default value expression