[ https://issues.apache.org/jira/browse/CALCITE-3783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ruben Q L updated CALCITE-3783: ------------------------------- Issue Type: Bug (was: Improvement) > Rule to remove Join on top of empty Values > ------------------------------------------ > > Key: CALCITE-3783 > URL: https://issues.apache.org/jira/browse/CALCITE-3783 > Project: Calcite > Issue Type: Bug > Components: core > Reporter: Ruben Q L > Assignee: Ruben Q L > Priority: Minor > > There are some scenarios where a Join with a left/right child being an empty > values can be removed: > - [ LEFT | INNER | SEMI | ANTI ] JOIN(EmptyValues, X) => EmptyValues > - [ INNER | SEMI ] JOIN(X, EmptyValues) => EmptyValues > - ANTI (equi)JOIN(X, EmptyValues) => X > The goal is to create new rule(s) (inside a new class named e.g. > JoinRemoveRule) to match and cover these scenarios. -- This message was sent by Atlassian Jira (v8.3.4#803005)