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Posted to user@pig.apache.org by ugo jardonnet <ug...@gmail.com> on 2011/09/02 17:26:58 UTC

Re-assign relation name

Is it safe and efficient to re-use relation names with pig >= 0.8.1:

A = load 'NYSE_dividends' (exchange, symbol, date, dividends);
A = filter A by dividends > 0;

Re: Re-assign relation name

Posted by Norbert Burger <no...@gmail.com>.

On Fri, Sep 2, 2011 at 11:26 AM, ugo jardonnet <ug...@gmail.com> wrote:
> Is it safe and efficient to re-use relation names with pig >= 0.8.1:
>
> A = load 'NYSE_dividends' (exchange, symbol, date, dividends);
> A = filter A by dividends > 0;

It's safe, but not usually recommended.  Take a look at:

http://ofps.oreilly.com/titles/9781449302641/intro_pig_latin.html

In your example, Pig loses track of the original A.

Norbert