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https://issues.apache.org/jira/browse/ASTERIXDB-2119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16190005#comment-16190005
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ASF subversion and git services commented on ASTERIXDB-2119:
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Commit 7926f25955871dd0d78d3a94852a4f3050c18a16 in asterixdb's branch
refs/heads/master from [~luochen01]
[ https://git-wip-us.apache.org/repos/asf?p=asterixdb.git;h=7926f25 ]
[ASTERIXDB-2119][COMP] Fix variable ordering of project pushdown
- user model changes: no
- storage format changes: no
- interface changes: no
Details:
Fix variable ordering of PushProjectDownRule by using LinkedHashSet.
Related to previous patch https://asterix-gerrit.ics.uci.edu/#/c/2043/
Change-Id: I21d0a2764e22482a9361b709e566d78acd33cf4d
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2048
Tested-by: Jenkins <[email protected]>
Contrib: Jenkins <[email protected]>
Integration-Tests: Jenkins <[email protected]>
Reviewed-by: Jianfeng Jia <[email protected]>
> 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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