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https://issues.apache.org/jira/browse/SPARK-27899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Li reassigned SPARK-27899:
-------------------------------
Assignee: Lantao Jin
> Make HiveMetastoreClient.getTableObjectsByName available in
> ExternalCatalog/SessionCatalog API
> ----------------------------------------------------------------------------------------------
>
> Key: SPARK-27899
> URL: https://issues.apache.org/jira/browse/SPARK-27899
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Juliusz Sompolski
> Assignee: Lantao Jin
> Priority: Major
>
> The new Spark ThriftServer SparkGetTablesOperation implemented in
> https://github.com/apache/spark/pull/22794 does a catalog.getTableMetadata
> request for every table. This can get very slow for large schemas (~50ms per
> table with an external Hive metastore).
> Hive ThriftServer GetTablesOperation uses
> HiveMetastoreClient.getTableObjectsByName to get table information in bulk,
> but we don't expose that through our APIs that go through Hive ->
> HiveClientImpl (HiveClient) -> HiveExternalCatalog (ExternalCatalog) ->
> SessionCatalog.
> If we added and exposed getTableObjectsByName through our catalog APIs, we
> could resolve that performance problem in SparkGetTablesOperation.
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