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Posted to gitbox@hive.apache.org by GitBox <gi...@apache.org> on 2020/11/17 13:00:56 UTC

[GitHub] [hive] pvary opened a new pull request #1682: HIVE-24399: Optimize Deserializer creation

pvary opened a new pull request #1682:
URL: https://github.com/apache/hive/pull/1682


   ### What changes were proposed in this pull request?
   - `Table.checkValidity` should use `getDeserializer` instead of `getDeserializerFromMetaStore`. This will use the cached version of the Deserializer so it will prevent creating a new one.
   - `SemanticAnalyzer.genConversionSelectOperator` should get a `Deserializer` as an input parameter, since we already has that at hand
   - When we are generating the FileSinkPlan on an destination table, we should reuse the table deserializer to get the columns whenever it is possible
   
   ### Why are the changes needed?
   To speed up query planning
   
   ### Does this PR introduce _any_ user-facing change?
   No
   
   ### How was this patch tested?
   Unit tests
   


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[GitHub] [hive] pvary merged pull request #1682: HIVE-24399: Optimize Deserializer creation

Posted by GitBox <gi...@apache.org>.
pvary merged pull request #1682:
URL: https://github.com/apache/hive/pull/1682


   


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