[SPARK-23379] remove redundant metastore access if the current database name is the same

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.1
• Fix Version/s: 2.4.0
• Component/s: SQL
• Assignee: Feng Liu
• Reporter: Feng Liu
• Created: 10/Feb/18 01:15
• Updated: 13/Feb/18 04:58
• Resolved: 13/Feb/18 04:58

Description

We should be able to reduce one metastore access if the target database name is as same as the current database:

https://github.com/apache/spark/blob/master/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveClientImpl.scala#L295

Issue Links

• links to: [Github] Pull Request #20565 (liufengdb)