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From "Christopher Olston (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-592) schema inferred incorrectly
Date Tue, 30 Dec 2008 19:41:44 GMT
schema inferred incorrectly
---------------------------

                 Key: PIG-592
                 URL: https://issues.apache.org/jira/browse/PIG-592
             Project: Pig
          Issue Type: Bug
    Affects Versions: types_branch
            Reporter: Christopher Olston


A simple pig script, that never introduces any schema information:

A = load 'foo';
B = foreach (group A by $8) generate group, COUNT($1);
C = load 'bar';       // ('bar' has two columns)
D = join B by $0, C by $0;
E = foreach D generate $0, $1, $3;

Fails, complaining that $3 does not exist:

java.io.IOException: Out of bound access. Trying to access non-existent column: 3. Schema
{ID2::group: bytearray,long,bytearray} has 3 column(s).

Apparently Pig gets confused, and thinks it knows the schema for C (a single bytearray column).


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