[IMPALA-10593] Skip runtime filter for outer joins when Expr not constant after null substitution

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: Impala 4.0.0
• Component/s: Frontend
• Epic Color: ghx-label-2
• Assignee: Steve Carlin
• Reporter: Steve Carlin
• Created: 18/Mar/21 14:19
• Updated: 03/Dec/21 05:50
• Resolved: 30/Mar/21 00:35

Description

Currently there is code that asserts that an Expr is not constant after substituting SlotRefs with constant nulls.

A third party tool needs this restriction to be weakened.  In a case where an Expr is checked and the Expr is not constant even after substituting nulls, the result will be to not generate a runtime filter for that Expr.