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  1. Hive
  2. HIVE-16869

Hive returns wrong result when predicates on non-existing columns are pushed down to Parquet reader

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.0.0
    • Component/s: None
    • Labels:
      None

      Description

      When hive.optimize.ppd and hive.optimize.index.filter are turned, and a select query has a condition on a column that doesn't exist in Parquet file (such as a partition column), Hive often returns wrong result.

      Please see below example for details:

      hive> create table test_parq (a int, b int) partitioned by (p int) stored as parquet;
      OK
      Time taken: 0.292 seconds
      hive> insert overwrite table test_parq partition (p=1) values (1, 2);
      OK
      Time taken: 5.08 seconds
      hive> select * from test_parq where a=1 and p=1;
      OK
      1	2	1
      Time taken: 0.441 seconds, Fetched: 1 row(s)
      hive> select * from test_parq where (a=1 and p=1) or (a=999 and p=999);
      OK
      1	2	1
      Time taken: 0.197 seconds, Fetched: 1 row(s)
      hive> set hive.optimize.index.filter=true;
      hive> select * from test_parq where (a=1 and p=1) or (a=999 and p=999);
      OK
      Time taken: 0.167 seconds
      hive> select * from test_parq where (a=1 or a=999) and (a=999 or p=1);
      OK
      Time taken: 0.563 seconds
      

        Attachments

        1. HIVE-16869.1.patch
          8 kB
          Yibing Shi
        2. HIVE-16869.2.patch
          8 kB
          Yibing Shi

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              • Assignee:
                Yibing Yibing Shi
                Reporter:
                Yibing Yibing Shi
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                • Created:
                  Updated:
                  Resolved: