AggResultContext (Apache Calcite API)

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

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`AggregateCall`	`call()`
`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 `i`th field of the key, cast to the appropriate type.

Methods inherited from interface org.apache.calcite.adapter.enumerable.AggResetContext
accumulator

Methods inherited from interface org.apache.calcite.adapter.enumerable.NestedBlockBuilder
currentBlock, currentNullables, exitBlock, nestBlock, nestBlock, nestBlock

- Method Detail
  - key
```
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()
```