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  1. MariaDB Server
  2. MDEV-6569

CAST(binary AS CHAR(N)) can create a malformed result

        Details

        • Type: Bug
        • Status: Open
        • Priority: Minor
        • Resolution: Unresolved
        • Affects Version/s: 5.3.12, 5.5.39, 10.0.13
        • Fix Version/s: 10.0
        • Component/s: None
        • Labels:
          None

          Description

          CAST from BINARY to CHAR does not check wel-formedness:

          MariaDB [test]> SELECT CAST(0xFFFF AS CHAR(10) CHARACTER SET utf8) AS ch, HEX(CAST(0xFFFF AS CHAR(10) CHARACTER SET utf8)) AS hex;
+----+------+
| ch | hex  |
+----+------+
| ��   | FFFF |
+----+------+
1 row in set (0.00 sec)

          The expected result would be to replace bad bytes to question
          marks and produce a warning.

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                  • Assignee:
                    bar Alexander Barkov
                    Reporter:
                    bar Alexander Barkov
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                    • Created:
                      Updated: