[HIVE-1750] Remove Partition Filtering Conditions when Possible

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.7.0
• Hadoop Flags: Reviewed
• Assignee: Siying Dong
• Reporter: Siying Dong
• Created: 26/Oct/10 02:48
• Updated: 16/Dec/11 23:59
• Resolved: 05/Nov/10 17:30

Description

For some simple queries, partition filtering constraints take 8% of CPU time (now 16% since we filter twice) even if the result is always true. When possible, we should remove these constraints to save CPU times.

Issue Links

• is related to: HIVE-1770 update opToParts list in PartitionPruner.prune() itself - reduces the possibility of bugs.
• is related to: HIVE-1769 pcr.q output is non-deterministic
• relates to: HIVE-1770 update opToParts list in PartitionPruner.prune() itself - reduces the possibility of bugs.
• relates to: HIVE-1769 pcr.q output is non-deterministic