Package org.apache.calcite.adapter.enumerable

Interface AggResultContext

All Superinterfaces:

AggResetContext, NestedBlockBuilder

All Known Subinterfaces:

AggAddContext, WinAggAddContext, WinAggResultContext

All Known Implementing Classes:

AggAddContextImpl, AggResultContextImpl, WinAggAddContextImpl, WinAggResultContextImpl

public interface AggResultContext
extends NestedBlockBuilder, AggResetContext

Information for a call to AggImplementor.implementResult(AggContext, AggResultContext)

Typically, the aggregation implementation will convert AggResetContext.accumulator() to the resulting value of the aggregation. The implementation MUST NOT destroy the contents of AggResetContext.accumulator().

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 interface org.apache.calcite.adapter.enumerable.AggResetContext

accumulator

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

currentBlock, exitBlock, nestBlock, nestBlock

Method Details

key

@Nullable Expression key()

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.

keyField

Expression keyField(int i)

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

call

AggregateCall call()

Returns the aggregate call.

resultTranslator

RexToLixTranslator resultTranslator()

Returns a RexToLixTranslator suitable to transform the result.