[
https://issues.apache.org/jira/browse/CALCITE-1045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15086451#comment-15086451
]
Julian Hyde commented on CALCITE-1045:
--------------------------------------
When fixing this case, search for {{if (fixed.calcite1045)}} in .oq files.
> Decorrelate sub-queries in Project and Join
> -------------------------------------------
>
> Key: CALCITE-1045
> URL: https://issues.apache.org/jira/browse/CALCITE-1045
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
>
> In CALCITE-816 we created a representation of sub-query in the relational
> algebra, RexSubQuery, so that we could defer expanding and de-correlating
> sub-queries until after SqlNode tree has been converted to RelNode tree. But
> the RelDecorrelator can only reliably handle sub-queries that occur in a
> Filter (such as WHERE EXISTS or WHERE IN).
> This task would except RelDecorrelator to handle sub-queries in Project
> (which occur with scalar sub-queries in the SELECT clause) and sub-queries in
> Join (which occur with scalar sub-queries in the ON clause of a JOIN).
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
