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  1. MariaDB Server
  2. MDEV-29154

Excessive warnings upon a call to RANDOM_BYTES

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: N/A
    • Fix Version/s: 10.10.1
    • Component/s: Server
    • Labels:
      None

      Description

      I am not setting it to critical 10.10v1 to avoid it blocking the release, but it would be good to look into this. Not only does it cause an untidy output with a long list of duplicate warnings, but also my concern is that it may indicate some redundancy in the way the function is executed.

      bb-10.10-MDEV-25704 c33ed04b7e7

      MariaDB [test]> select random_bytes(cast('x' as unsigned)+1);
      +---------------------------------------+
      | random_bytes(cast('x' as unsigned)+1) |
      +---------------------------------------+
      | �                                      |
      +---------------------------------------+
      1 row in set, 5 warnings (0.000 sec)
       
      MariaDB [test]> show warnings;
      +---------+------+----------------------------------------+
      | Level   | Code | Message                                |
      +---------+------+----------------------------------------+
      | Warning | 1292 | Truncated incorrect INTEGER value: 'x' |
      | Warning | 1292 | Truncated incorrect INTEGER value: 'x' |
      | Warning | 1292 | Truncated incorrect INTEGER value: 'x' |
      | Warning | 1292 | Truncated incorrect INTEGER value: 'x' |
      | Warning | 1292 | Truncated incorrect INTEGER value: 'x' |
      +---------+------+----------------------------------------+
      5 rows in set (0.000 sec)
      

      The CAST alone only produces one warning, as expected:

      MariaDB [test]> select cast('x' as unsigned);
      +-----------------------+
      | cast('x' as unsigned) |
      +-----------------------+
      |                     0 |
      +-----------------------+
      1 row in set, 1 warning (0.000 sec)
       
      MariaDB [test]> show warnings;
      +---------+------+----------------------------------------+
      | Level   | Code | Message                                |
      +---------+------+----------------------------------------+
      | Warning | 1292 | Truncated incorrect INTEGER value: 'x' |
      +---------+------+----------------------------------------+
      1 row in set (0.000 sec)
      

      If random_bytes is replaced by another function, no extra warnings are produced (although I didn't try all functions, so maybe random_bytes is not unique in this sense):

      MariaDB [test]> select ceil(cast('x' as unsigned)+1);
      +-------------------------------+
      | ceil(cast('x' as unsigned)+1) |
      +-------------------------------+
      |                             1 |
      +-------------------------------+
      1 row in set, 1 warning (0.000 sec)
       
      MariaDB [test]> show warnings;
      +---------+------+----------------------------------------+
      | Level   | Code | Message                                |
      +---------+------+----------------------------------------+
      | Warning | 1292 | Truncated incorrect INTEGER value: 'x' |
      +---------+------+----------------------------------------+
      1 row in set (0.000 sec)
      

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              Assignee:
              danblack Daniel Black
              Reporter:
              elenst Elena Stepanova
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                Dates

                Created:
                Updated:
                Resolved:

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