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https://issues.apache.org/jira/browse/HIVE-20419?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopal V updated HIVE-20419:
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Component/s: Vectorization
> Vectorization: Speed up
> VectorizationDispatcher.validateInputFormatAndSchemaEvolution() for ACIDv2
> --------------------------------------------------------------------------------------------------
>
> Key: HIVE-20419
> URL: https://issues.apache.org/jira/browse/HIVE-20419
> Project: Hive
> Issue Type: Bug
> Components: Vectorization
> Reporter: Gopal V
> Priority: Major
>
> With ACID table, the format and schema layouts are much more strictly
> controlled - the table cannot be made of partial ORC and partial RCFile.
> This assumption can remove this loop and the slow check for schema between
> each partition before vectorizing the operators - the worst-case performance
> is the common & correct case, where all of them match.
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