[CALCITE-2902] Improve performance of AbstractRelNode#computeDigest

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.18.0
• Fix Version/s: 1.19.0
• Labels: pull-request-available
• Assignee: Stamatis Zampetakis
• Reporter: Stamatis Zampetakis
• Created: 08/Mar/19 17:50
• Updated: 25/Mar/19 00:11
• Resolved: 11/Mar/19 07:50

Description

Compute digest is a method which is called very often in multiple places. More frequently we end up here by calls through the VolcanoPlanner when we need to register a relational expression which is another very common operation. The profiler shows that we are spending quite some time in this method.

Issue Links

• links to: GitHub Pull Request #1097