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From "Koji Noguchi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PIG-2968) ColumnMapKeyPrune fails to prune a subtree inside foreach
Date Fri, 12 Oct 2012 19:03:03 GMT
Koji Noguchi created PIG-2968:

             Summary: ColumnMapKeyPrune fails to prune a subtree inside foreach
                 Key: PIG-2968
                 URL: https://issues.apache.org/jira/browse/PIG-2968
             Project: Pig
          Issue Type: Bug
            Reporter: Koji Noguchi
            Assignee: Koji Noguchi
            Priority: Minor

Sample code 

$ cat test/foreach.pig 
daily = load 'nyse' as (exchange, symbol);
grpd = group daily by exchange;
uniquecnt = foreach grpd {
        sym = daily.symbol;
        uniq_sym = distinct sym;
        generate group, uniq_sym;
another = FOREACH uniquecnt GENERATE group;
explain another;


This breaks when it tries to prune uniq_sym->sym->innerload_daily

bq. 2012-10-12 14:54:11,031 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2000: Error
processing rule ColumnMapKeyPrune. Try -t ColumnMapKeyPrune

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