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Posted to issues@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2019/02/01 15:45:00 UTC

[jira] [Resolved] (IMPALA-3631) Investigate why Decimal to Timestamp casting became slower

     [ https://issues.apache.org/jira/browse/IMPALA-3631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-3631.
-----------------------------------
    Resolution: Later

I don't think this is really a priority now - we should probably just treat this the same as other performance improvements and wait until we have some evidence that it's important to improve.

> Investigate why Decimal to Timestamp casting became slower
> ----------------------------------------------------------
>
>                 Key: IMPALA-3631
>                 URL: https://issues.apache.org/jira/browse/IMPALA-3631
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend
>    Affects Versions: Impala 2.6.0
>            Reporter: Taras Bobrovytsky
>            Priority: Minor
>              Labels: performance
>
> https://issues.cloudera.org/browse/IMPALA-3163 fixes the correctness issue with Decimal to Timestamp casting, but worsens the performance by about 30%. We want to understand why this happens and possibly fix it.



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