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

[Lucy Cunningham (JIRA)]

Lucy Cunningham created PIG-2969:
------------------------------------

             Summary: Can't get simple macro with two return values to work
                 Key: PIG-2969
                 URL: https://issues.apache.org/jira/browse/PIG-2969
             Project: Pig
          Issue Type: Bug
          Components: piggybank
    Affects Versions: 0.11
            Reporter: Lucy Cunningham


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

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