Package org.apache.drill.exec.expr.fn.impl

Class CollectListMapsAggFunction

java.lang.Object

org.apache.drill.exec.expr.fn.impl.CollectListMapsAggFunction

All Implemented Interfaces:

DrillAggFunc, DrillFunc

public class CollectListMapsAggFunction
extends Object
implements DrillAggFunc

Aggregate function which stores incoming fields into the map. This function accepts a variable number of arguments, where one argument is a field name within the resulting map and another argument is actual field to store into the map.

Constructor Summary

Constructors

Constructor	Description
CollectListMapsAggFunction()

Method Summary

Modifier and Type	Method	Description
void	add()
void	output()
void	reset()
void	setup()	Initialization for the beginning of the aggregation.

Methods inherited from class java.lang.Object

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

Constructor Details

CollectListMapsAggFunction

public CollectListMapsAggFunction()

Method Details

setup

public void setup()

Description copied from interface: DrillAggFunc

Initialization for the beginning of the aggregation.

Specified by:

setup in interface DrillAggFunc

add

public void add()

Specified by:

add in interface DrillAggFunc

output

public void output()

Specified by:

output in interface DrillAggFunc

reset

public void reset()

Specified by:

reset in interface DrillAggFunc