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From "Milind Bhandarkar (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1693) There needs to be a way in foreach to indicate "and all the rest of the fields"
Date Mon, 25 Oct 2010 21:52:21 GMT

    [ https://issues.apache.org/jira/browse/PIG-1693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924742#action_12924742
] 

Milind Bhandarkar commented on PIG-1693:
----------------------------------------

If we go with "..", then can we mandate that both the beginning and end indexes are mandatory
? That will avoid the ambiguity in your last example.

> There needs to be a way in foreach to indicate "and all the rest of the fields"
> -------------------------------------------------------------------------------
>
>                 Key: PIG-1693
>                 URL: https://issues.apache.org/jira/browse/PIG-1693
>             Project: Pig
>          Issue Type: New Feature
>          Components: impl
>            Reporter: Alan Gates
>            Assignee: Daniel Dai
>             Fix For: 0.9.0
>
>
> A common use case we see in Pig is people have many columns in their data and they only
want to operate on a few of them.  Consider for example if before storing data with ten columns,
the user wants to perform a cast on one column:
> {code}
> ...
> Z = foreach Y generate (int)firstcol, secondcol, thridcol, forthcol, fifthcol, sixthcol,
seventhcol, eigthcol, ninethcol, tenthcol;
> store Z into 'output';
> {code}
> Obviously this only gets worse as the user has more columns.  Ideally the above could
be transformed to something like:
> {code}
> ...
> Z = foreach Y generate (int)firstcol, "and all the rest";
> store Z into 'output'
> {code}

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