[CALCITE-3809] RexSimplify simplifies nondeterministic function incorrectly

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.21.0
• Fix Version/s: 1.23.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Chunwei Lei
• Reporter: Chunwei Lei
• Created: 20/Feb/20 14:55
• Updated: 23/Dec/20 08:06
• Resolved: 06/Mar/20 09:41

Description

For example, rand() = rand() will be simplified to IS NOT NULL(rand()), which is wrong because rand() = rand() might be false while IS NOT NULL(rand()) is always true.

Issue Links

• links to: GitHub Pull Request #1818