[CALCITE-4461] Do not cast to logical node inside Enumerable rules

• Type: Task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.26.0
• Fix Version/s: 1.27.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Vladimir Ozerov
• Reporter: Vladimir Ozerov
• Created: 11/Jan/21 10:02
• Updated: 03/Jun/21 22:32
• Resolved: 01/Feb/21 05:36

Description

Currently, some Enumerable rules work with the base operator classes, such as Join, while others have an explicit cast to Logical counterparts, such as `LogicalJoin`, LogicalProject, etc. This makes it impossible to convert custom non-logical nodes into Enumerable using the built-in rules because such an invocation will fail with a ClassCastException.

The proposal is to change all existing rules so that they work with the base RelNode classes.

Issue Links

• links to: GitHub Pull Request #2323