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https://issues.apache.org/jira/browse/SPARK-29966?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16979911#comment-16979911
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Wenchen Fan commented on SPARK-29966:
-------------------------------------
Forgot to mention that I also -1 on changing the public API to fix the
regression. We should fix the internal implementation instead. [~imback82] do
you have time to work on it?
> Add version method in TableCatalog to avoid load table twice
> ------------------------------------------------------------
>
> Key: SPARK-29966
> URL: https://issues.apache.org/jira/browse/SPARK-29966
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: ulysses you
> Priority: Minor
>
> Now resolve logic plan will load table twice which are in ResolveTables and
> ResolveRelations. The ResolveRelations is old code path, and ResolveTables is
> v2 code path, and the reason why load table twice is that ResolveTables will
> load table and rollback v1 table to ResolveRelations code path.
> The same scene also exists in ResolveSessionCatalog.
> It affect that execute command will cost double time than spark 2.4.
> Here is the idea that add a table version method in TableCatalog, and rules
> should always get table version firstly without load table.
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