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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2019/06/03 07:42:00 UTC
[jira] [Assigned] (SPARK-27899) Make
HiveMetastoreClient.getTableObjectsByName available in
ExternalCatalog/SessionCatalog API
[ https://issues.apache.org/jira/browse/SPARK-27899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-27899:
------------------------------------
Assignee: Lantao Jin (was: Apache Spark)
> 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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