Contents

  1. Introduction

This document captures the specification for nested foreach support in pig and proposal for extending this support over multiple levels. This is tracked at PIG-1631.

Introduction

Pig currently supports DISTINCT, FILTER, LIMIT, CROSS and ORDER BY inside nested foreach statement and it is highly desired to have support for FOREACH nested inside a foreach. 

C = foreach B {
     C1 = foreach A generate ..;
     ...
     generate group, ..;
}

NestedForeach (last edited 2011-08-03 08:56:14 by Aniket Mokashi)