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https://issues.apache.org/jira/browse/PIG-4880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15257145#comment-15257145
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Koji Noguchi commented on PIG-4880:
-----------------------------------
{quote}
Similarly, when macro param and command-line param overlap, it fails with
{{Macro inline failed for macro 'mygroupby'. Reason: Macro contains argument or
return value number which conflicts with a Pig parameter of the same name.}}
{quote}
Sample code.
{code:title=macro.pig}
DEFINE mygroupby(REL, key, number) RETURNS G {
$G = GROUP $REL by $key parallel $number;
};
{code}
{code:title=test.pig}
-- equivalent of -param number=111
%declare number 111;
IMPORT 'macro.pig';
data = LOAD '1234.txt' USING PigStorage() AS (i: int);
result = mygroupby(data, i, 222);
STORE result INTO 'test.out' USING PigStorage();
{code}
I think we can allow this by simply taking the macro parameter value.
> Overlapping of parameter substitution names inside&outside a macro fails with
> NPE
> ---------------------------------------------------------------------------------
>
> Key: PIG-4880
> URL: https://issues.apache.org/jira/browse/PIG-4880
> Project: Pig
> Issue Type: Bug
> Components: parser
> Affects Versions: 0.12.0
> Reporter: Koji Noguchi
> Assignee: Koji Noguchi
>
> With
> {code:title=macro.pig}
> DEFINE mygroupby(REL, key) RETURNS G {
> %declare number 333;
> $G = GROUP $REL by $key parallel $number;
> };
> {code}
> and
> {code:title=test.pig}
> -- equivalent of -param number=111
> %declare number 111;
> IMPORT 'macro.pig';
> data = LOAD '1234.txt' USING PigStorage() AS (i: int);
> result = mygroupby(data, i);
> STORE result INTO 'test.out' USING PigStorage();
> {code}
> Fails with
> {{error msg: <file myscript.pig, line 4> Macro inline failed for macro
> 'mygroupby'. Reason: null}}
> Similarly, when macro param and command-line param overlap, it fails with
> {{Macro inline failed for macro 'mygroupby'. Reason: Macro contains argument
> or return value number which conflicts with a Pig parameter of the same
> name.}}
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