Rohini Palaniswamy created PIG-4734:
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             Summary: TOMAP schema inferring breaks some scripts in type 
checking for bincond
                 Key: PIG-4734
                 URL: https://issues.apache.org/jira/browse/PIG-4734
             Project: Pig
          Issue Type: Bug
            Reporter: Rohini Palaniswamy


PIG-4674 added schema inferring for TOMAP.

{code}
FOREACH A GENERATE (val == 'x' ? TOMAP('key', floatfield1) : (val == 'y' ? 
GenerateFloatMap('key', floatfield2) : NULL)) as floatmap:map[float],
{code}

The following line fails with
{code}
Two inputs of BinCond must have compatible schemas. left hand side: 
#675:map(#676:float) right hand side: #801:map
        at 
org.apache.pig.newplan.logical.visitor.TypeCheckingExpVisitor.visit(TypeCheckingExpVisitor.java:616)
        ... 45 more
{code}

GenerateFloatMap is a UDF that returns new HashMap<String, Float>(), but does 
not have outputSchema() defined. It worked earlier because TOMAP also did not 
have outputSchema() defined.



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