[
https://issues.apache.org/jira/browse/CALCITE-5740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17732811#comment-17732811
]
Rong Rong commented on CALCITE-5740:
------------------------------------
actually i think it would be super useful to add the getInputFieldsUsed(),
either as a function signature from {{{}RelNode{}}}, or as
{code:java}
RelOptUtil.getInputFieldsUsed(relNode);{code}
I can quickly POC if that's desirable
> Support for AggToSemiJoinRule
> -----------------------------
>
> Key: CALCITE-5740
> URL: https://issues.apache.org/jira/browse/CALCITE-5740
> Project: Calcite
> Issue Type: New Feature
> Reporter: Rong Rong
> Priority: Major
>
> **Description**
> Currently we only have JoinToSemiJoin and ProjectToSemiJoin rule. which in
> the rule itself it performance check and see if the project accesses columns
> from the RHS result
> This can be extended to Aggregate as well, experimental code:
> https://github.com/walterddr/calcite/pull/1/files
> **Alternative**
> Alternative is to add a project/calc between the join and the aggregate to
> activate the project-to-semi-join rule. please share if there's any other
> alternative if I haven't considered.
> thanks
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
