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https://issues.apache.org/jira/browse/ASTERIXDB-2119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16188514#comment-16188514
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ASF subversion and git services commented on ASTERIXDB-2119:
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Commit ce348d68475a88c9bbf364abc284b64ac7f17e34 in asterixdb's branch
refs/heads/master from [~luochen01]
[ https://git-wip-us.apache.org/repos/asf?p=asterixdb.git;h=ce348d6 ]
[ASTERIXDB-2119][COMP] Fix variable ordering of projects
- user model changes: no
- storage format changes: no
- interface changes: no
Details:
The current IntroduceProjectsRule implementation uses HashSet to
calculate projected variables, which makes the ordering of output
variables unpreditable. This patch fixes this undesired behavior by
using LinkedHashSet to ensure the project variables have the same
ordering from the original variables.
Change-Id: Id96a5fe048dd11b7f2e97f4d4a802736ba5ba003
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2043
Sonar-Qube: Jenkins <[email protected]>
Tested-by: Jenkins <[email protected]>
Contrib: Jenkins <[email protected]>
Reviewed-by: Taewoo Kim <[email protected]>
Integration-Tests: Jenkins <[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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