[PIG-2969] Can't get simple macro with two return values to work

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 0.11
• Component/s: piggybank
• Assignee: Unassigned
• Reporter: Lucy Cunningham
• Created: 12/Oct/12 20:07
• Updated: 24/Oct/12 21:27
• Resolved: 24/Oct/12 21:27

Description

Hi, I followed the documentation to try and write a pig macro with two output relations, but i'm getting errors:

define mymacro (a, b)
returns

{c, d}

{
$c = $a;
$d = $b;
};

e = load 'thing' as (x:int);
f = load 'thing' as (x:int);

g,h = mymacro(e,f);

dump g;
dump h;
~
~

Gives me error:

ERROR 2999: Unexpected internal error. Undefined parameter : c

java.lang.RuntimeException: Undefined parameter : c
at org.apache.pig.tools.parameters.PreprocessorContext.substitute(PreprocessorContext.java:232)
at org.apache.pig.tools.parameters.PigFileParser.input(PigFileParser.java:65)
at org.apache.pig.tools.parameters.PigFileParser.Parse(PigFileParser.java:43)
at org.apache.pig.tools.parameters.ParameterSubstitutionPreprocessor.parsePigFile(ParameterSubstitutionPreprocessor.java:105)
at org.apache.pig.tools.parameters.ParameterSubstitutionPreprocessor.genSubstitutedFile(ParameterSubstitutionPreprocessor.java:98)
at org.apache.pig.Main.runParamPreprocessor(Main.java:778)
at org.apache.pig.Main.run(Main.java:568)
at org.apache.pig.Main.main(Main.java:154)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:186)

Is this something that I am doing wrong or is there a bug?

Thanks!
Lucy