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Posted to issues@calcite.apache.org by "Juhwan Kim (JIRA)" <ji...@apache.org> on 2019/07/08 22:05:00 UTC

[jira] [Created] (CALCITE-3183) trimming method for Filter rel uses wrong traitSet

Juhwan Kim created CALCITE-3183:
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             Summary: trimming method for Filter rel uses wrong traitSet
                 Key: CALCITE-3183
                 URL: https://issues.apache.org/jira/browse/CALCITE-3183
             Project: Calcite
          Issue Type: Bug
            Reporter: Juhwan Kim
            Assignee: Juhwan Kim


It seems like there is a bug here: https://github.com/apache/calcite/blob/e8d598a434e8dbadaf756f8c57c748f4d7e16fdf/core/src/main/java/org/apache/calcite/sql2rel/RelFieldTrimmer.java#L487.

Unlike other trimming methods, filter trim function copies the current filter rel and directly pushes it to the builder instead of calling factory method for filter rel. The problem with the current code is that it uses the same traitSet even though it would no longer be valid after trimming its input. For example, fields in collation might have been updated after trimming. We should reflect this change when creating a new rel.

 



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