[HIVE-12356] Capture if a rule mutated the plan.

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.2.0
• Assignee: Laljo John Pullokkaran
• Reporter: Laljo John Pullokkaran
• Created: 06/Nov/15 00:06
• Updated: 25/May/16 11:49

Description

Currently Hive Optimizer doesn't capture if a rule mutated the plan.
This info could be useful in:
1. determining if a subsequent optimization rule needs to be run or not
(Ex if Constant propagation didn't mutate plan, then don't run subsequent PPD)
2. Explain can contain info about which optimizations are applied effectively on the query.