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

Class ByteArrayFunctions.ByteSubstring

java.lang.Object

org.apache.drill.exec.expr.fn.impl.ByteArrayFunctions.ByteSubstring

All Implemented Interfaces:

DrillFunc, DrillSimpleFunc

Enclosing class:

ByteArrayFunctions

public static class ByteArrayFunctions.ByteSubstring
extends Object
implements DrillSimpleFunc

Evaluate a substring expression for a given value; specifying the start position, and optionally the end position. - If the start position is negative, start from abs(start) characters from the end of the buffer. - If no length is specified, continue to the end of the string. - If the substring expression's length exceeds the value's upward bound, the value's length will be used. - If the substring is invalid, return an empty string.

Constructor Summary

Constructors

Constructor	Description
ByteSubstring()

Method Summary

Modifier and Type	Method	Description
void	eval()
void	setup()

Methods inherited from class java.lang.Object

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

Constructor Details

ByteSubstring

public ByteSubstring()

Method Details

setup

public void setup()

Specified by:

setup in interface DrillSimpleFunc

eval

public void eval()

Specified by:

eval in interface DrillSimpleFunc