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https://issues.apache.org/jira/browse/SPARK-34616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-34616:
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Labels: pull-request-available (was: )
> SessionCatalog#requireDbExists is called too many times affects SQL
> performance
> -------------------------------------------------------------------------------
>
> Key: SPARK-34616
> URL: https://issues.apache.org/jira/browse/SPARK-34616
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.4.5, 3.0.0
> Reporter: Zhang Jianguo
> Priority: Minor
> Labels: pull-request-available
> Attachments: db_existance.PNG
>
>
> Almost all SQL need to check if database exist before execution.
> Usually database is stable. Every check needs to connect to Metastore and
> check if the DB exists in Databse. This behavior could be too expensive.
>
> A proposal is to add a switch to control if it's necessary to check DB's
> existance.
>
> [requireDbExists]([https://github.com/apache/spark/blob/53e4dba7c489ac5c0ad61f0121c4e247de5b485c/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala#L197)]
>
> !db_existance.PNG!
>
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