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Posted to notifications@asterixdb.apache.org by "Chen Luo (JIRA)" <ji...@apache.org> on 2017/10/01 23:43:00 UTC

[jira] [Created] (ASTERIXDB-2119) Project Rule has non-deterministic ordering of variables

Chen Luo created ASTERIXDB-2119:
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             Summary: Project Rule has non-deterministic ordering of variables
                 Key: ASTERIXDB-2119
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2119
             Project: Apache AsterixDB
          Issue Type: Improvement
          Components: COMP - Compiler
            Reporter: Chen Luo
            Assignee: Chen Luo


IntroduceProjectsRule introduces projections whenever needed to eliminate unnecessary variables. However, the current implementation depends on HashSet, which makes the ordering of output variables indeterministic. This is undesirable for tests, and some operators which may depend on the ordering of variables.



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