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  1. MariaDB Server
  2. MDEV-19952

SHOW CREATE VIEW incorrectly emits JSON_MERGE as JSON_MERGE_PRESERVE

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Details

    • Bug
    • Status: Open (View Workflow)
    • Major
    • Resolution: Unresolved
    • 10.3.16
    • 10.3
    • JSON, Views
    • MariaDB 10.3.16 on Debian Linux 9 (AMD64)

    Description

      On MariaDB 10.3.13 running on Gentoo AMD64… creating a view which references JSON_MERGE works as expected:

      MariaDB [test]> create view testview as select json_merge('{"key1":"val1"}','{"key2":"val2"}') as testcol;
      Query OK, 0 rows affected (0.006 sec)
       
      MariaDB [test]> show create view testview;
      +----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
      | View     | Create View                                                                                                                                                       | character_set_client | collation_connection |
      +----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
      | testview | CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `testview` AS select json_merge('{"key1":"val1"}','{"key2":"val2"}') AS `testcol` | utf8                 | utf8_general_ci      |
      +----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
      1 row in set (0.000 sec)
      

      Do the same on 10.3.16 on Debian 9 (AMD64), I get this:

      MariaDB [test]> create view testview as select json_merge('{"key1":"val1"}','{"key2":"val2"}') as testcol;
      Query OK, 0 rows affected (0.006 sec)
       
      MariaDB [test]> show create view testview;
      +----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
      | View     | Create View                                                                                                                                                                | character_set_client | collation_connection |
      +----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
      | testview | CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `testview` AS select json_merge_preserve('{"key1":"val1"}','{"key2":"val2"}') AS `testcol` | utf8mb4              | utf8mb4_general_ci   |
      +----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
      1 row in set (0.001 sec)
      

      The json_merge_preserve also appears in mysqldump and this causes restoring the dump to fail.

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            rucha174 Rucha Deodhar
            sjlongland Stuart Longland
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              Updated:

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