[jira] [Updated] (CALCITE-3649) Hints should be propagated correctly in planner rules if original node is transformed to different kind

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-3649?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated CALCITE-3649:
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    Labels: pull-request-available  (was: )

> Hints should be propagated correctly in planner rules if original node is transformed to different kind
> -------------------------------------------------------------------------------------------------------
>
>                 Key: CALCITE-3649
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3649
>             Project: Calcite
>          Issue Type: Sub-task
>          Components: core
>    Affects Versions: 1.21.0
>            Reporter: Danny Chen
>            Assignee: Danny Chen
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.22.0
>
>
> If the AGG was transformed to PROJECT + AGG, the hints of AGG should be propagated to the AGG node.
> In current implementation, the hints would lost.
> The perfect solution is to identify the replaced sub-tree, and for this tree, we should check which node is the right one to attach hints. But for this patch, we only consider the new transformed node with pattern of PROJECT + "node of same kind of original",  this solves most of the cases.



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