[CALCITE-4499] FilterJoinRule misses opportunity to push filter to semijoin input

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.28.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Jesús Camacho Rodríguez
• Reporter: Jesús Camacho Rodríguez
• Created: 16/Feb/21 04:15
• Updated: 27/Feb/24 22:23
• Resolved: 03/Jun/21 23:40

Description

Consider the following plan:

LogicalProject(DNAME=[$1])
  LogicalJoin(condition=[AND(=($0, $10), =($8, 100))], joinType=[semi])
    LogicalTableScan(table=[[scott, DEPT]])
    LogicalTableScan(table=[[scott, EMP]])

The second conjunct only refers to columns from the right input, thus it could be pushed to the right input. However, FilterJoinRule misses this opportunity.

Issue Links

• links to: GitHub Pull Request #2349