[CALCITE-3833] Support SemiJoin in EnumerableMergeJoin

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.21.0
• Fix Version/s: 1.23.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Ruben Q L
• Reporter: Ruben Q L
• Created: 27/Feb/20 09:18
• Updated: 08/Jul/20 15:27
• Resolved: 10/Apr/20 09:19

Description

Currently, EnumerableMergeJoin only supports INNER joins. The goal of this ticket is to improve this join operator in order to support SEMI joins too.

Note: RelMdCollation#mergeJoin will need to be modified too: in case of SEMI join, it must return just the leftCollations.

Issue Links

• is blocked by: CALCITE-3285 EnumerableMergeJoin should support non-equi join conditions
• is related to: CALCITE-3834 Support AntiJoin in EnumerableMergeJoin
• relates to: CALCITE-4113 Support LEFT join in EnumerableMergeJoin
• links to: GitHub Pull Request #1883