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Posted to issues@impala.apache.org by "Noemi Pap-Takacs (Jira)" <ji...@apache.org> on 2022/08/09 13:15:00 UTC

[jira] [Resolved] (IMPALA-11474) Codegen Tuple size in Sorter

     [ https://issues.apache.org/jira/browse/IMPALA-11474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Noemi Pap-Takacs resolved IMPALA-11474.
---------------------------------------
    Fix Version/s: Impala 4.2.0
       Resolution: Fixed

> Codegen Tuple size in Sorter
> ----------------------------
>
>                 Key: IMPALA-11474
>                 URL: https://issues.apache.org/jira/browse/IMPALA-11474
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>            Reporter: Noemi Pap-Takacs
>            Assignee: Noemi Pap-Takacs
>            Priority: Minor
>             Fix For: Impala 4.2.0
>
>
> The sorter works with fixed-length tuples. The number of bytes in a tuple is known before execution, it is available in the query plan. However, currently the tuple size is treated as a member variable of the TupleSorter. Using Codegen to replace this member variable by a constant in sorter-ir.cc could speed up the quicksort phase.



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