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Posted to dev@hive.apache.org by "Seonggon Namgung (Jira)" <ji...@apache.org> on 2023/01/20 07:49:00 UTC

[jira] [Created] (HIVE-26968) SharedWorkOptimizer merges TableScan operators that have different DPP parents

Seonggon Namgung created HIVE-26968:
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             Summary: SharedWorkOptimizer merges TableScan operators that have different DPP parents
                 Key: HIVE-26968
                 URL: https://issues.apache.org/jira/browse/HIVE-26968
             Project: Hive
          Issue Type: Bug
            Reporter: Seonggon Namgung


SharedWorkOptimizer merges TableScan operators that have different DPP parents, which leads to the creation of semantically wrong query plan.

In our environment, running TPC-DS query64 on 1TB Iceberg format table returns no rows  because of this problem. (The corrent result has 7094 rows.)

We use hive.optimize.shared.work=true, hive.optimize.shared.work.extended=true, and hive.optimize.shared.work.dppunion=false to reproduce the bug.



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