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https://issues.apache.org/jira/browse/PIG-1476?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Russell Jurney resolved PIG-1476.
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Resolution: Fixed
This is actually ok.
> Add trailing flag to commands to prevent retention of relation name in field
> names: STRIP ?
> -------------------------------------------------------------------------------------------
>
> Key: PIG-1476
> URL: https://issues.apache.org/jira/browse/PIG-1476
> Project: Pig
> Issue Type: New Feature
> Affects Versions: 0.7.0
> Environment: sunny, 60% humidity with a chance of rain.
> Reporter: Russell Jurney
> Fix For: 0.8.0
>
>
> After doing a JOIN or a GROUP/FOREACH, one often ends up with data looking
> like:
> > DESCRIBE foo;
> foo: {other_thing::f1:int, other_thing::f2:chararray, other_thing::f3: int}
> If oun was to let this chain, ouin can end up with:
> first_thing::second_thing::third_thing::fourth_thing::f1 which is pretty
> hairy.
> What wunn usually wants is:
> foo: {f1:int, f2:chararray, f3: int}
> At this point, won is left with two choices, neither of which is very good.
> Choice wan:
> > foo = FOREACH foo GENERATE $0 AS f1, $1 AS f2, $3 AS f3;
> This is a poor choice because later when wahn edits this file, it is
> confusing to remember what order is what field when wun manipulates something
> up stream in the script. So instead whun does this:
> > foo = FOREACH foo GENERATE old_thing::f1 AS f1, old_thing::f2 AS f2,
> > old_thing::f3 AS f3;
> or
> > foo = FOREACH foo GENERATE f1 AS f1, f2 AS f2, f3 AS f3;
> This is a poor choice because it is verbose and cumbersome.
> With no good choices available, whan is unsure what to do, pauses and
> reflects that the Pig is perplexing, and hopes for a better tomorrow. Here's
> what wuhn should do to avoid this situation:
> foo = JOIN old_thing by f1, other_thing BY f1 STRIP;
> DESCRIBE foo> foo: {f1:int, f2:chararray, f3: int};
> I think so, anyway. I leave the behavior of duplicate fields to more
> enlightened beings, but I think this would be a big improvement to Pig Latin.
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