Pig should check schema alias duplication at any levels.
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Key: PIG-1654
URL: https://issues.apache.org/jira/browse/PIG-1654
Project: Pig
Issue Type: Bug
Reporter: Xuefu Zhang
Assignee: Xuefu Zhang
Fix For: 0.9.0
The following script appears valid to Pig but it shouldn't:
A = load 'file' as (a:tuple( u:int, u:bytearray, w:long), b:int, c:chararray);
dump A;
Pig tries to launch map/reduce jobs for this.
However, for the following script, Pig correctly reports error message:
A = load 'file' as (a:int, b:long, c:bytearray);
dump A;
Error message is:
2010-09-28 15:53:37,390 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
1108: Duplicate schema alias: b in "A"
Thus, Pig only checks alias duplication at the top level, which is confirmed by
looking at the code. The right behavior is that the same check should be
applied at all levels.
This should be addressed in the new parser.
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