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https://issues.apache.org/jira/browse/PIG-1796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017788#comment-13017788
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Olga Natkovich commented on PIG-1796:
-------------------------------------
The current description has most of the information. What is missing is that
expressions are also supported in the nested block. I suggest with re-write it
the following way:
FOREACH...GENERATE used with a inner bag. Use this syntax:
alias = FOREACH nested_alias {
alias = {nested_op | nested_exp}; [{alias = {nested_op | nested_exp}; …]
GENERATE expression [AS schema] [expression [AS schema]….]
};
Nested_exp – arbitrary supported expression
I believe that example already covers the expression case.
One more thing that we need to mention is that macros are not allowed inside of
nested foreach
> need to document what is supported in nested foreach
> ----------------------------------------------------
>
> Key: PIG-1796
> URL: https://issues.apache.org/jira/browse/PIG-1796
> Project: Pig
> Issue Type: Improvement
> Components: documentation
> Reporter: Olga Natkovich
> Assignee: Olga Natkovich
> Fix For: 0.9.0
>
>
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