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Posted to issues-all@impala.apache.org by "Aman Sinha (Jira)" <ji...@apache.org> on 2021/03/30 00:17:00 UTC

[jira] [Work started] (IMPALA-10619) Enable external FE to leverage standardization of first_value/last_value functions

     [ https://issues.apache.org/jira/browse/IMPALA-10619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on IMPALA-10619 started by Aman Sinha.
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> Enable external FE to leverage standardization of first_value/last_value functions
> ----------------------------------------------------------------------------------
>
>                 Key: IMPALA-10619
>                 URL: https://issues.apache.org/jira/browse/IMPALA-10619
>             Project: IMPALA
>          Issue Type: Sub-task
>          Components: Frontend
>            Reporter: Aman Sinha
>            Assignee: Aman Sinha
>            Priority: Major
>
> The FIRST_VALUE, LAST _VALUE functions go through standardization process in AnalyticExpr where they may be rewritten with different number of parameters or with different window frame.  In order for an external FE to leverage this standardization, some minor changes are needed to allow overriding of creation of a FunctionCallExpr.



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