[HIVE-24756] Refactor CBO rules to exploit the new RelRule interface

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Stamatis Zampetakis
• Created: 09/Feb/21 14:56
• Updated: 09/Feb/21 14:57

Description

Calcite 1.25.0 introduced a new API, RelRule, for creating optimizer rules. Parts of the old API, RelOptRule are deprecated and it will be removed entirely in a future version. Along with the new API there were various changes on the way that default optimizer rules are created providing more fine grained configuration.

For the reasons above Hive CBO rules should be revisited to exploit those changes. The refactoring may allow some custom rule classes to be removed entirely and also it will be necessary to do so when RelOptRule interface is removed completely.

Issue Links

• relates to: CALCITE-3923 Refactor how planner rules are parameterized