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https://issues.apache.org/jira/browse/PIG-1693?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thejas M Nair updated PIG-1693:
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Attachment: PIG-1693.2.patch
PIG-1693.2.patch - addressing review comments.
Unit tests pass.
Test-patch results -
[exec] -1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] +1 tests included. The patch appears to include 15 new or
modified tests.
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[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec]
[exec] -1 javac. The applied patch generated 958 javac compiler
warnings (more than the trunk's current 941 warnings).
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
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[exec] +1 release audit. The applied patch does not increase the
total number of release audit warnings.
The additional javac warnings are from code generated by antlr.
> support project-range expression. (was: 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: Thejas M Nair
> Fix For: 0.9.0
>
> Attachments: PIG-1693.1.patch, PIG-1693.2.patch
>
>
> 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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