[jira] [Created] (TINKERPOP-2972) ProjectStep will produce an unexpected output when dealing with duplicate keys

["Jianzhong Liu (Jira)" <ji...@apache.org>]

Jianzhong Liu created TINKERPOP-2972:
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             Summary: ProjectStep will produce an unexpected output when dealing with duplicate keys
                 Key: TINKERPOP-2972
                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2972
             Project: TinkerPop
          Issue Type: Improvement
          Components: process
            Reporter: Jianzhong Liu


g.V().project("a", "b", "b").by("lang").by(T.id).by("age")
TP:
1    \{'b': 29}
2    \{'b': 27}
3    \{'a': 'java', 'b': '3'}
4    \{'b': 32}
5    \{'a': 'java', 'b': '5'}
6    \{'b': 35}

TinkerPop erroneously generates an output from the final 'productive' by-traversal when a key is used more than once, a situation that should not occur. A proposed solution is to throw an exception when a redundant key is detected.



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