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https://issues.apache.org/jira/browse/PIG-2244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13621770#comment-13621770
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Johnny Zhang commented on PIG-2244:
-----------------------------------
Thanks for the comments, Daniel! Right now the error message looks like
{noformat}
ERROR 1000: Error during parsing. Pig script failed to parse:
at expanding macro 'simple_macro' (macro1.pig:6)
<file macro1.pig, line 2, column 11> Undefined alias: macro_simple_macro_a_0
{noformat}
So if 'a' is expanded to a (change made by the patch), instead of
macro_simple_macro_a_0, then Pig will be able to figure out a is a defined
alias, then there will be no error message thrown.
If the intent of the jira is to throw a better error message, then we will
check if any quoted string equals to a existing alias, fail the job and throw
error message like:
"should not use quoted alias as macro arguments" or "should not use quoted
macro argument to mask an existing alias".
If you think it is the later case, I will try to post another patch. Thanks!
> Macros cannot be passed relation names
> --------------------------------------
>
> Key: PIG-2244
> URL: https://issues.apache.org/jira/browse/PIG-2244
> Project: Pig
> Issue Type: Bug
> Components: parser
> Affects Versions: 0.9.0
> Reporter: Alan Gates
> Assignee: Johnny Zhang
> Priority: Minor
> Attachments: PIG-2244.patch.txt
>
>
> If an alias is passed quoted, it gets expanded as if it were an alias in the
> macro, which leads to a very strange error message.
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