[HIVE-7655] CBO: Reading of partitioned table stats slows down explain

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.13.1
• Fix Version/s: 0.14.0
• Labels: hive
• Assignee: Harish Butani
• Reporter: Mostafa Mokhtar
• Created: 07/Aug/14 22:51
• Updated: 13/Nov/14 19:44
• Resolved: 08/Aug/14 21:11

Description

This defect is due to a regression introduced in https://issues.apache.org/jira/browse/HIVE-7625, explain for queries that touch partitioned tables is 10x slower.

RelOptHiveTable.getRowCount calls listPartitionsWithAuthInfo which returns the data from all partitions, listPartitionsByExpr should be used instead.