FLATTEN eliminates the alias
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Key: PIG-1112
URL: https://issues.apache.org/jira/browse/PIG-1112
Project: Pig
Issue Type: Bug
Reporter: Ankur
Fix For: 0.6.0
If schema for a field of type 'bag' is partially defined then FLATTEN()
incorrectly eliminates the field and throws an error.
Consider the following example:-
A = LOAD 'sample' using PigStorage() as (first:chararray, second:chararray,
ladder:bag{});
B = FOREACH A GENERATE first,FLATTEN(ladder) as third,second;
C = GROUP B by (first,third);
This throws the error
ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1000: Error during parsing.
Invalid alias: third in {first: chararray,second: chararray}
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