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Posted to commits@calcite.apache.org by GitBox <gi...@apache.org> on 2022/11/18 23:16:20 UTC

[GitHub] [calcite] sdreynolds opened a new pull request, #2975: [CALCITE-5391] Preserve Project field names

sdreynolds opened a new pull request, #2975:
URL: https://github.com/apache/calcite/pull/2975

   ## Why:
   When rewriting the query for a semi join, the
   `JoinOnUniqueToSemiJoinRule` pushes a new project via `RelBuilder`. This project is *almost* a good copy of the original `Project` -- it is just missing the field names.
   
   ## How:
   This change uses `RelDataType` of the `Project` to get the field names for the new `Project` pushed on the `Relbuilder` stack. This is similar to what is done in `SemiJoinRule#perform`


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[GitHub] [calcite] libenchao merged pull request #2975: [CALCITE-5391] JoinOnUniqueToSemiJoinRule should preserve field names, if possible

Posted by GitBox <gi...@apache.org>.

libenchao merged PR #2975:
URL: https://github.com/apache/calcite/pull/2975


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