[IMPALA-9539] Enable the conjunctive normal form rewrites by default

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 4.0.0
• Component/s: Frontend
• Epic Color: ghx-label-14
• Assignee: Aman Sinha
• Reporter: Aman Sinha
• Created: 20/Mar/20 19:52
• Updated: 23/Dec/20 23:51
• Resolved: 02/May/20 02:48

Description

IMPALA-9183 adds the functionality to convert disjunctive predicates into conjunctive normal form (CNF). Currently, the rewrite is disabled by default and can be enabled by setting enable_cnf_rewrites to true. Since it can cause several plan changes, we should ensure it does not cause regressions (both in terms of result correctness and performance) and then enable it by default. This JIRA is a follow-up to IMPALA-9183.

Issue Links

• is duplicated by: IMPALA-2108 Improve partition pruning by extracting partition-column filters from non-trivial disjunctions.