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

Class IsEmptyUtils

java.lang.Object

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

public class IsEmptyUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
IsEmptyUtils()

Method Summary

Modifier and Type	Method	Description
static boolean	mapIsEmpty(FieldReader reader)	This function recursively traverses a Drill map to determine whether the map is empty or not.

Methods inherited from class java.lang.Object

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

Constructor Details

IsEmptyUtils

public IsEmptyUtils()

Method Details

mapIsEmpty

public static boolean mapIsEmpty(FieldReader reader)

This function recursively traverses a Drill map to determine whether the map is empty or not.

Parameters:

reader - A FieldReader containing the field in question

Returns:

True if the field contains no data, false if it does.