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Posted to issues-all@impala.apache.org by "Csaba Ringhofer (Jira)" <ji...@apache.org> on 2021/10/25 19:10:00 UTC

[jira] [Created] (IMPALA-10985) always_true hint is not needed if all predicates are on partitioning columns

Csaba Ringhofer created IMPALA-10985:
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             Summary: always_true hint is not needed if all predicates are on partitioning columns
                 Key: IMPALA-10985
                 URL: https://issues.apache.org/jira/browse/IMPALA-10985
             Project: IMPALA
          Issue Type: Improvement
            Reporter: Csaba Ringhofer


IMPALA-10314 added always_true hint that leads to assuming that a file in a table will return at least on row even if there is a WHERE clause. Currently we need to add it even if all columns used in the WHERE are partitioning columns. This is not needed, as these predicates can't drop any more rows after partition pruning.



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