org.apache.calcite.adapter.enumerable.impl

Class AggResetContextImpl

java.lang.Object

org.apache.calcite.adapter.enumerable.NestedBlockBuilderImpl

org.apache.calcite.adapter.enumerable.impl.AggResetContextImpl

All Implemented Interfaces:

AggResetContext, NestedBlockBuilder

Direct Known Subclasses:

AggResultContextImpl, WinAggResetContextImpl

public class AggResetContextImpl
extends NestedBlockBuilderImpl
implements AggResetContext

Implementation of AggResetContext

Constructor Summary

Constructors

Constructor and Description
AggResetContextImpl(BlockBuilder block, List<Expression> accumulator) Creates aggregate reset context

Method Summary

Methods

Modifier and Type	Method and Description
List<Expression>	accumulator() Returns accumulator variables that should be reset.

Methods inherited from class org.apache.calcite.adapter.enumerable.NestedBlockBuilderImpl

currentBlock, currentNullables, exitBlock, nestBlock, nestBlock, nestBlock

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.adapter.enumerable.NestedBlockBuilder

currentBlock, currentNullables, exitBlock, nestBlock, nestBlock, nestBlock

Constructor Detail

AggResetContextImpl

public AggResetContextImpl(BlockBuilder block,
                   List<Expression> accumulator)

Creates aggregate reset context

Parameters:

block - code block that will contain the added initialization

accumulator - accumulator variables that store the intermediate aggregate state

Method Detail

accumulator

public List<Expression> accumulator()

Description copied from interface: AggResetContext

Returns accumulator variables that should be reset. There MUST be an assignment even if you just assign the default value.

Specified by:

accumulator in interface AggResetContext

Returns:

accumulator variables that should be reset or empty list when no accumulator variables are used by the aggregate implementation.

See Also:

AggImplementor.getStateType(org.apache.calcite.adapter.enumerable.AggContext)