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Posted to issues-all@impala.apache.org by "yx91490 (Jira)" <ji...@apache.org> on 2022/10/12 03:28:00 UTC
[jira] [Resolved] (IMPALA-11504) Speed up Decimal16Value division by specializing DecimalUtil::GetScaleMultiplier()
[ https://issues.apache.org/jira/browse/IMPALA-11504?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
yx91490 resolved IMPALA-11504.
------------------------------
Fix Version/s: Impala 4.2.0
Resolution: Fixed
> Speed up Decimal16Value division by specializing DecimalUtil::GetScaleMultiplier<int256_t>()
> --------------------------------------------------------------------------------------------
>
> Key: IMPALA-11504
> URL: https://issues.apache.org/jira/browse/IMPALA-11504
> Project: IMPALA
> Issue Type: Improvement
> Reporter: yx91490
> Assignee: yx91490
> Priority: Major
> Fix For: Impala 4.2.0
>
>
> There exists a call chain:
> {code:java}
> DecimalValue<int128_t>::Divide() ->
> DecimalUtil::MultiplyByScale<int256_t>() ->
> DecimalUtil::GetScaleMultiplier(){code}
> but decimal-util.h didn't specialize DecimalUtil::GetScaleMultiplier<int256_t>(), causing more performance loss.
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