Package org.apache.calcite.adapter.enumerable.impl

Class AggResultContextImpl

java.lang.Object

org.apache.calcite.adapter.enumerable.NestedBlockBuilderImpl

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

org.apache.calcite.adapter.enumerable.impl.AggResultContextImpl

All Implemented Interfaces:

AggResetContext, AggResultContext, NestedBlockBuilder

Direct Known Subclasses:

AggAddContextImpl, WinAggResultContextImpl

public class AggResultContextImpl
extends AggResetContextImpl
implements AggResultContext

Implementation of AggResultContext.

Constructor Summary

Constructors

Constructor	Description
AggResultContextImpl(BlockBuilder block, @Nullable AggregateCall call, List<Expression> accumulator, @Nullable ParameterExpression key, @Nullable PhysType keyPhysType)	Creates aggregate result context.

Method Summary

Modifier and Type	Method	Description
AggregateCall	call()	Returns the aggregate call.
@Nullable Expression	key()	Expression by which to reference the key upon which the values in the accumulator were aggregated.
Expression	keyField(int i)	Returns an expression that references the ith field of the key, cast to the appropriate type.
RexToLixTranslator	resultTranslator()	Returns a RexToLixTranslator suitable to transform the result.

Methods inherited from class org.apache.calcite.adapter.enumerable.impl.AggResetContextImpl

accumulator

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

currentBlock, exitBlock, 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.AggResetContext

accumulator

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

currentBlock, exitBlock, nestBlock, nestBlock

Constructor Details

AggResultContextImpl

public AggResultContextImpl(BlockBuilder block,
 @Nullable AggregateCall call,
 List<Expression> accumulator,
 @Nullable ParameterExpression key,
 @Nullable PhysType keyPhysType)

Creates aggregate result context.

Parameters:

block - Code block that will contain the result calculation statements

call - Aggregate call

accumulator - Accumulator variables that store the intermediate aggregate state

key - Key

Method Details

key

public @Nullable Expression key()

Description copied from interface: AggResultContext

Expression by which to reference the key upon which the values in the accumulator were aggregated. Most aggregate functions depend on only the accumulator, but quasi-aggregate functions such as GROUPING access at the key.

Specified by:

key in interface AggResultContext

keyField

public Expression keyField(int i)

Description copied from interface: AggResultContext

Returns an expression that references the ith field of the key, cast to the appropriate type.

Specified by:

keyField in interface AggResultContext

call

public AggregateCall call()

Description copied from interface: AggResultContext

Returns the aggregate call.

Specified by:

call in interface AggResultContext

Overrides:

call in class AggResetContextImpl

resultTranslator

public RexToLixTranslator resultTranslator()

Description copied from interface: AggResultContext

Returns a RexToLixTranslator suitable to transform the result.

Specified by:

resultTranslator in interface AggResultContext