public class AggNull extends AggregatorBase
| Constructor and Description |
|---|
AggNull() |
| Modifier and Type | Method and Description |
|---|---|
Aggregator |
copy(Expr expr) |
static Accumulator |
createAccNull() |
Accumulator |
createAccumulator()
Create an accumulator for this aggregator
|
boolean |
equals(Object other) |
Expr |
getExpr()
Get the expression - may be null (e.g COUNT(*)) ;
|
Node |
getValueEmpty()
Value if there are no elements in any group : return null for no result
|
int |
hashCode() |
String |
toPrefixString() |
String |
toString() |
copyTransform, getValue, keypublic Aggregator copy(Expr expr)
public String toString()
toString in class AggregatorBasepublic String toPrefixString()
toPrefixString in interface AggregatortoPrefixString in class AggregatorBasepublic Accumulator createAccumulator()
AggregatorcreateAccumulator in interface AggregatorcreateAccumulator in class AggregatorBasepublic Node getValueEmpty()
AggregatorgetValueEmpty in interface AggregatorgetValueEmpty in class AggregatorBasepublic Expr getExpr()
Aggregatorpublic int hashCode()
hashCode in interface AggregatorhashCode in class AggregatorBasepublic boolean equals(Object other)
equals in interface Aggregatorequals in class AggregatorBasepublic static Accumulator createAccNull()
Licenced under the Apache License, Version 2.0