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  1. MariaDB Server
  2. MDEV-8049

name_const() is not consistent about its signess

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 5.5(EOL), 10.0(EOL), 10.1(EOL), 10.2(EOL)
    • 10.3.8
    • Data types
    • None

    Description

      $ mysql-tmp --column-type-info test
      		 
      ...
      		 
      mysql> SELECT 18446744073709551615 AS c1, name_const('a',18446744073709551615) AS c2;
      		 
      ...
      		 
      Field   1:  `c1`
      		 
      Type:       LONGLONG
      		 
      Flags:      NOT_NULL UNSIGNED BINARY NUM 
      ...
      		 
      Field   2:  `c2`
      		 
      Type:       LONGLONG
      		 
      Flags:      BINARY NUM
      		 
      ...
      		 
      +----------------------+----------------------+
      		 
      | c1                   | c2                   |
      		 
      +----------------------+----------------------+
      		 
      | 18446744073709551615 | 18446744073709551615 |
      		 
      +----------------------+----------------------

      Notice, metadata says LONGLONG UNSIGNED for c1 but LONGLONG SIGNED for c2, but return values are both unsigned.

      Another example of incorrect behaviour:

      DROP TABLE IF EXISTS t1;
      		 
      CREATE TABLE t1 AS SELECT 18446744073709551615 AS c1, name_const('a',18446744073709551615) AS c2;
      		 
      SHOW WARNINGS;
      		 
      SHOW CREATE TABLE t1;

      The above script returns

      +---------+------+---------------------------------------------+
      		 
      | Level   | Code | Message                                     |
      		 
      +---------+------+---------------------------------------------+
      		 
      | Warning | 1264 | Out of range value for column 'c2' at row 1 |
      		 
      +---------+------+---------------------------------------------+
      		 
      1 row in set (0.00 sec)
      		 
       
      		 
      +-------+--------------------------------------------------------------------------------------------------------------------------------------------+
      		 
      | Table | Create Table                                                                                                                               |
      		 
      +-------+--------------------------------------------------------------------------------------------------------------------------------------------+
      		 
      | t1    | CREATE TABLE `t1` (
      		 
        `c1` bigint(20) unsigned NOT NULL DEFAULT '0',
      		 
        `c2` bigint(20) DEFAULT NULL
      		 
      ) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
      		 
      +-------+--------------------------------------------------------------------------------------------------------------------------------------------+

      The expected result is to have unsigned flag in both fields.

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            bar Alexander Barkov
            bar Alexander Barkov
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            Dates

              Created:
              Updated:
              Resolved:

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