[HIVE-13057] Remove duplicate copies of TableDesc property values in PartitionDesc

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.1.0
• Assignee: Mohit Sabharwal
• Reporter: Mohit Sabharwal
• Created: 13/Feb/16 01:29
• Updated: 21/Jun/16 15:43
• Resolved: 19/Feb/16 22:59

Description

For a partitioned table, each PartitionDesc has a copy of corresponding TableDesc.

While TableDesc is mutable and hence cannot be interned, it's property values can be.

For a simple select on a table with 100K partitions, this cut total number of String instances by ~65%.

Most replicated strings were location, serde, input/output format, column, types, table name, etc.

Issue Links

• links to: review board