Package org.apache.calcite.test.catalog

Class CountingFactory

java.lang.Object

org.apache.calcite.sql2rel.NullInitializerExpressionFactory

org.apache.calcite.test.catalog.CountingFactory

All Implemented Interfaces:

InitializerExpressionFactory

public class CountingFactory
extends NullInitializerExpressionFactory

To check whether InitializerExpressionFactory.newColumnDefaultValue(org.apache.calcite.plan.RelOptTable, int, org.apache.calcite.sql2rel.InitializerContext) is called.

If a column is in defaultColumns, returns 1 as the default value.

Field Summary

Fields

Modifier and Type	Field	Description
static final TryThreadLocal<AtomicInteger>	THREAD_CALL_COUNT

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

INSTANCE

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, 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, postExpressionConversionHook

Methods inherited from class java.lang.Object

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

Field Details

THREAD_CALL_COUNT

public static final TryThreadLocal<AtomicInteger> THREAD_CALL_COUNT

Method Details

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.

If the default value comes from a un-validated SqlNode, make sure to invoke InitializerContext.validateExpression(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.sql.SqlNode) first before you actually do the conversion with method InitializerContext.convertExpression(org.apache.calcite.sql.SqlNode).

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,
 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