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  1. MariaDB Server
  2. MDEV-21076

NOT NULL and UNIQUE constraints cause SUM() to yield an incorrect result

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.4.11, 5.5(EOL), 10.1(EOL), 10.2(EOL), 10.3(EOL), 10.4(EOL)
    • N/A
    • Server
    • None
    • Ubuntu 19.04

    Description

      Consider the following statements:

      CREATE TABLE t0(c0 INT NOT NULL, c1 CHAR UNIQUE);
      		 
      INSERT INTO t0 VALUES (0, 1);
      		 
      INSERT INTO t0 VALUES (0, '');
      		 
      SELECT SUM(a.t) FROM (SELECT (c1 RLIKE c1) = (c0 IS NULL) as t FROM t0) as a; -- expected: 1, actual: 0

      I would expect SUM() to yield 1, because the expression evaluates to TRUE for one row:

      SELECT (c1 RLIKE c1) = (c0 IS NULL) FROM t0; -- 1, 0

      Attachments

        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. MDEV-33344 REGEXP empty string inconsistent

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-33344 REGEXP empty string inconsistent

          • Major - Major loss of function.
          • Closed

          Activity

            Ascending order - Click to sort in descending order
            mrigger Manuel Rigger created issue -
            elenst Elena Stepanova made changes -
            Field Original Value New Value
            Component/s Server [ 13907 ]
            Fix Version/s 10.1 [ 16100 ]
            Fix Version/s 10.2 [ 14601 ]
            Fix Version/s 10.3 [ 22126 ]
            Fix Version/s 10.4 [ 22408 ]
            Affects Version/s 5.5 [ 15800 ]
            Affects Version/s 10.1 [ 16100 ]
            Affects Version/s 10.2 [ 14601 ]
            Affects Version/s 10.3 [ 22126 ]
            Affects Version/s 10.4 [ 22408 ]
            Assignee Alexander Barkov [ bar ]
            elenst Elena Stepanova made changes -
            Status Open [ 1 ] Confirmed [ 10101 ]
            marko Marko Mäkelä made changes -
            julien.fritsch Julien Fritsch made changes -
            Fix Version/s 10.1 [ 16100 ]
            serg Sergei Golubchik made changes -
            Workflow MariaDB v3 [ 101235 ] MariaDB v4 [ 144193 ]
            ralf.gebhardt Ralf Gebhardt made changes -
            Fix Version/s 10.2 [ 14601 ]
            julien.fritsch Julien Fritsch made changes -
            Fix Version/s 10.3 [ 22126 ]
            bar Alexander Barkov made changes -
            bar Alexander Barkov made changes -
            bar Alexander Barkov made changes -
            issue.field.resolutiondate 2024-04-23 08:20:47.0 2024-04-23 08:20:46.662
            bar Alexander Barkov made changes -
            Fix Version/s N/A [ 14700 ]
            Fix Version/s 10.4 [ 22408 ]
            Resolution Fixed [ 1 ]
            Status Confirmed [ 10101 ] Closed [ 6 ]

            People

              bar Alexander Barkov
              mrigger Manuel Rigger
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              Dates

                Created:
                Updated:
                Resolved:

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