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Posted to issues-all@impala.apache.org by "Qifan Chen (Jira)" <ji...@apache.org> on 2021/07/19 16:05:00 UTC
[jira] [Resolved] (IMPALA-10763) Min/max filters should be enabled
on Z-order sorted columns
[ https://issues.apache.org/jira/browse/IMPALA-10763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Qifan Chen resolved IMPALA-10763.
---------------------------------
Fix Version/s: Impala 4.1
Resolution: Fixed
> Min/max filters should be enabled on Z-order sorted columns
> -----------------------------------------------------------
>
> Key: IMPALA-10763
> URL: https://issues.apache.org/jira/browse/IMPALA-10763
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Qifan Chen
> Assignee: Qifan Chen
> Priority: Major
> Fix For: Impala 4.1
>
>
> Currently, min/max filters are enabled for lexically sorted columns (please refer to
> IMPALA-10709: Min/max filters should be enabled for joins on sorted columns in Parquet tables) with a limitation that only the leading sorted columns are assigned with min/max filters. Non-leading sorted columns will be ignored.
> To effectively handle multiple sort columns, Impala offers an alternative sort order called Z-order. Z-order sorts these columns in multi-dimension into a sequence of values such that the locality of the data points are preserved.
> The purpose of this JIRA is to integrate the min/max filter feature with a table with Z-order sorted columns.
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