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Posted to dev@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2015/11/24 13:49:10 UTC

[jira] [Created] (HIVE-12508) HiveAggregateJoinTransposeRule places a heavy load on the metadata system

Jesus Camacho Rodriguez created HIVE-12508:
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             Summary: HiveAggregateJoinTransposeRule places a heavy load on the metadata system
                 Key: HIVE-12508
                 URL: https://issues.apache.org/jira/browse/HIVE-12508
             Project: Hive
          Issue Type: Bug
          Components: CBO
    Affects Versions: 2.0.0
            Reporter: Jesus Camacho Rodriguez
            Assignee: Jesus Camacho Rodriguez


Finding out whether the input is already unique requires a call to areColumnsUnique that currently (until CALCITE-794 is fixed) places a heavy load on the metadata system. This can lead to long CBO planning.

This is a temporary fix that avoid the call to the method till then.



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