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  1. MariaDB Server
  2. MDEV-7041

COLLATION(CAST('a' AS CHAR BINARY)) returns a wrong result

        Details

        • Type: Bug
        • Status: Closed
        • Priority: Major
        • Resolution: Fixed
        • Affects Version/s: 5.5.40, 10.0.14
        • Fix Version/s: 10.1.3
        • Component/s: Character Sets, Parser
        • Labels:
          None

          Description

          mysql> SELECT COLLATION(CAST('a' AS CHAR BINARY));
+-------------------------------------+
| COLLATION(CAST('a' AS CHAR BINARY)) |
+-------------------------------------+
| utf8_general_ci                     |
+-------------------------------------+
1 row in set (0.00 se

          The expected result is utf8_bin.
          It would be inline with the same syntax in CREATE TABLE:

          DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a CHAR BINARY) CHARSET=utf8;
SHOW CREATE TABLE t1;

          +-------+-------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table                                                                                                            |
+-------+-------------------------------------------------------------------------------------------------------------------------+
| t1    | CREATE TABLE `t1` (
  `a` char(1) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 |
+-------+-------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

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                  • Assignee:
                    serg Sergei Golubchik
                    Reporter:
                    bar Alexander Barkov
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                    • Created:
                      Updated:
                      Resolved: