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  1. MariaDB Server
  2. MDEV-9369

IN operator with ( num, NULL ) gives inconsistent result

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    • Sprint:
      5.5.48-0, 10.1.13

      Description

      Output:

      mysql> select (1,null) not in ((2,2),(3,3)), (1,null) not in ((2,2)), (1,null) not in ((3,3));
      +-------------------------------+-------------------------+-------------------------+
      | (1,null) not in ((2,2),(3,3)) | (1,null) not in ((2,2)) | (1,null) not in ((3,3)) |
      +-------------------------------+-------------------------+-------------------------+
      |                          NULL |                       1 |                       1 |
      +-------------------------------+-------------------------+-------------------------+
      1 row in set (0.00 sec)
       
      mysql> select version();
      +-----------------+
      | version()       |
      +-----------------+
      | 10.1.10-MariaDB |
      +-----------------+
      1 row in set (0.00 sec)

      Recreate:

      select (1,null) not in ((2,2),(3,3)), (1,null) not in ((2,2)), (1,null) not in ((3,3));

      Problem:
      ========
      (1,null) not in ((2,2),(3,3)) is expected to return true.

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            Assignee:
            bar Alexander Barkov
            Reporter:
            dylan Dylan Su
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              Dates

              Created:
              Updated:
              Resolved:

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