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https://issues.apache.org/jira/browse/PIG-2248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13648831#comment-13648831
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Daniel Dai commented on PIG-2248:
---------------------------------
Actually, I feel the check is very involved in the patch. Now we check UDF
(after going through all the classloader trick), how about default/define? How
about keyword? We need to exhaustively check everything and make sure there is
no conflict. On the other side, how about defining an order Pig resolve a
symbol, and clearly documented.
At this moment I would prefer documenting the symbol resolving order, unless a
cleaner solution is proposed.
> Pig parser does not detect when a macro name masks a UDF name
> -------------------------------------------------------------
>
> Key: PIG-2248
> URL: https://issues.apache.org/jira/browse/PIG-2248
> Project: Pig
> Issue Type: Bug
> Components: parser
> Affects Versions: 0.9.0
> Reporter: Alan Gates
> Assignee: Johnny Zhang
> Priority: Minor
> Attachments: PIG-2248.patch.txt, PIG-2248.patch.txt,
> PIG-2248.patch.txt, PIG-2248.patch.txt
>
>
> Pig accepts a macro like:
> {code}
> define COUNT(in_relation, min_gpa) returns c {
> b = filter $in_relation by gpa >= $min_gpa;
> $c = foreach b generate age, name;
> }
> {code}
> This should produce a warning that it is masking a UDF.
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