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https://issues.apache.org/jira/browse/SPARK-36191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-36191:
-----------------------------------
Assignee: Allison Wang
> Support ORDER BY and LIMIT to be on the correlation path
> --------------------------------------------------------
>
> Key: SPARK-36191
> URL: https://issues.apache.org/jira/browse/SPARK-36191
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Allison Wang
> Assignee: Allison Wang
> Priority: Major
> Labels: pull-request-available
>
> A correlation path is defined as the sub-tree of all the operators that are
> on the path from the operator hosting the correlated expressions up to the
> operator producing the correlated values.
> We want to support ORDER BY (Sort) and LIMT operators to be on the
> correlation path to achieve better feature parity with Postgres. Here is an
> example query in `postgreSQL/join.sql`:
> {code:SQL}
> select * from
> text_tbl t1
> left join int8_tbl i8
> on i8.q2 = 123,
> lateral (select i8.q1, t2.f1 from text_tbl t2 limit 1) as ss
> where t1.f1 = ss.f1;
> {code}
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