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Posted to issues@impala.apache.org by "Qifan Chen (Jira)" <ji...@apache.org> on 2021/06/22 22:41:00 UTC

[jira] [Created] (IMPALA-10763) Min/max filters should be enabled on Z-order sorted columns

Qifan Chen created IMPALA-10763:
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             Summary: 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: Test
            Reporter: Qifan Chen


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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