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  1. MariaDB Server
  2. MDEV-19317

TEXT column accepts too long literals as a default value

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.2(EOL), 10.3(EOL), 10.4(EOL)
    • 10.4.5
    • Data types
    • None

    Description

      I create this table and intentionally pass a too long value as a default:

      EXECUTE IMMEDIATE 'CREATE OR REPLACE TABLE t1 (a TINYTEXT DEFAULT ?)' USING REPEAT('a', 256);
      		 
      SHOW CREATE TABLE t1;


      +-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
      		 
      | Table | Create Table                                                                                                                                                                                                                                                                                                                                         |
      		 
      +-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
      		 
      | t1    | CREATE TABLE `t1` (
      		 
        `a` tinytext DEFAULT 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
      		 
      ) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
      		 
      +-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

      The table was created without problems.
      Note, instead EXECUTE IMMEDIATE it can be also a directly executed CREATE statement with an explicit long string literal:

      CREATE OR REPLACE TABLE t1 (a TINYTEXT DEFAULT '...256 or more characters...');

      Now if I run any query which sets t1.a to the default value, I get an error:

      INSERT INTO t1 VALUES ();


      ERROR 1406 (22001): Data too long for column 'a' at row 1

      Looks wrong. Too long literals should be caught at CREATE time, like they are caught in case of VARCHAR:

      CREATE OR REPLACE TABLE t1 (a VARCHAR(10) DEFAULT '...10 or more characters...');


      ERROR 1067 (42000): Invalid default value for 'a'

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          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. MDEV-4912 Data type plugin API version 1

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

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              bar Alexander Barkov
              bar Alexander Barkov
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                Created:
                Updated:
                Resolved:

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