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  1. MariaDB Server
  2. MDEV-34725

JSON_ARRAYAGG corrupts Unicode value

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Details

    • Bug
    • Status: Open (View Workflow)
    • Major
    • Resolution: Unresolved
    • 10.9.8
    • None
    • Character Sets, JSON
    • None
    • OpenBSD 7.5 (GENERIC.MP) #82: Wed Mar 20 15:48:40 MDT 2024

    Description

      In this example, JSON_ARRAYAGG changes Unicode character 0xC2A0 (non-breaking space) to 0xA0:

      MariaDB [t]> CREATE TABLE `t1` (`a` text);
      Query OK, 0 rows affected (0.001 sec)
       
      MariaDB [t]> INSERT INTO `t1` (`a`) VALUES (UNHEX('58C2A059')); -- X Y
      Query OK, 1 row affected (0.000 sec)
       
      MariaDB [t]> SELECT HEX(`a`) FROM `t1`;
      +----------+
      | HEX(`a`) |
      +----------+
      | 58C2A059 |
      +----------+
      1 row in set (0.000 sec)
       
      MariaDB [t]> SELECT `a` FROM `t1`;
      +------+
      | a    |
      +------+
      | X Y  |
      +------+
      1 row in set (0.000 sec)
       
      MariaDB [t]> SELECT HEX(JSON_ARRAY(`a`)) FROM `t1`;
      +----------------------+
      | HEX(JSON_ARRAY(`a`)) |
      +----------------------+
      | 5B2258C2A059225D     |
      +----------------------+
      1 row in set (0.000 sec)
       
      MariaDB [t]> SELECT JSON_ARRAY(`a`) FROM `t1`;
      +-----------------+
      | JSON_ARRAY(`a`) |
      +-----------------+
      | ["X Y"]         |
      +-----------------+
      1 row in set (0.000 sec)
       
      MariaDB [t]> SELECT HEX(JSON_ARRAYAGG(`a`)) FROM `t1`;
      +-------------------------+
      | HEX(JSON_ARRAYAGG(`a`)) |
      +-------------------------+
      | 5B2258A059225D          |
      +-------------------------+
      1 row in set (0.000 sec)
       
      MariaDB [t]> SELECT JSON_ARRAYAGG(`a`) FROM `t1`;
      +--------------------+
      | JSON_ARRAYAGG(`a`) |
      +--------------------+
      | ["X?Y"]             |
      +--------------------+
      1 row in set (0.000 sec)
      

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            libertyit Rogers
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              Updated:

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