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Posted to issues@impala.apache.org by "Michael Smith (Jira)" <ji...@apache.org> on 2023/10/23 21:19:00 UTC

[jira] [Resolved] (IMPALA-5081) Expose IR optimization level via query option

     [ https://issues.apache.org/jira/browse/IMPALA-5081?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Smith resolved IMPALA-5081.
-----------------------------------
    Fix Version/s: Impala 4.4.0
       Resolution: Fixed

> Expose IR optimization level via query option
> ---------------------------------------------
>
>                 Key: IMPALA-5081
>                 URL: https://issues.apache.org/jira/browse/IMPALA-5081
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>            Reporter: Michael Ho
>            Assignee: Michael Smith
>            Priority: Minor
>              Labels: codegen
>             Fix For: Impala 4.4.0
>
>
> Certain queries may spend a lot of time in the IR optimization. Currently, there is a start-up option to disable optimization in LLVM. However, it may be of inconvenience to users to have to restart the entire Impala cluster to just use that option. This JIRA aims at exploring exposing a query option for users to choose the optimization level for a given query (e.g. we can have a level which just only have a dead code elimination pass or no optimization at all).



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