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  1. MariaDB Server
  2. MDEV-12504

Wrong data type for LEAST(date_expr,time_expr)

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.2(EOL), 10.3(EOL)
    • 10.3.1
    • OTHER
    • None

    Description

      This query:

      SELECT
      		 
        LEAST(DATE'2001-01-01', TIME'10:20:30') AS c1,
      		 
        CONCAT(LEAST(DATE'2001-01-01', TIME'10:20:30')) AS c2;

      returns a good result:

      +---------------------+---------------------+
      		 
      | c1                  | c2                  |
      		 
      +---------------------+---------------------+
      		 
      | 2001-01-01 00:00:00 | 2001-01-01 00:00:00 |
      		 
      +---------------------+---------------------+

      Now I try the same query in CREATE..SELECT

      DROP TABLE IF EXISTS t1;
      		 
      SET sql_mode='';
      		 
      CREATE TABLE t1 AS SELECT
      		 
        LEAST(DATE'2001-01-01', TIME'10:20:30') AS c1,
      		 
        CONCAT(LEAST(DATE'2001-01-01', TIME'10:20:30')) AS c2;
      		 
      SHOW WARNINGS;
      		 
      SELECT * FROM t1;

      It returns a warning:

      +---------+------+-----------------------------------------+
      		 
      | Level   | Code | Message                                 |
      		 
      +---------+------+-----------------------------------------+
      		 
      | Warning | 1265 | Data truncated for column 'c2' at row 1 |
      		 
      +---------+------+-----------------------------------------+

      And this result set:

      +---------------------+------------+
      		 
      | c1                  | c2         |
      		 
      +---------------------+------------+
      		 
      | 2001-01-01 00:00:00 | 2001-01-01 |
      		 
      +---------------------+------------+

      Notice, the c2 value was truncated.

      Now I do:

      SHOW CREATE TABLE t1;


      +-------+-------------------------------------------------------------------------------------------------------------------------------------+
      		 
      | Table | Create Table                                                                                                                        |
      		 
      +-------+-------------------------------------------------------------------------------------------------------------------------------------+
      		 
      | t1    | CREATE TABLE `t1` (
      		 
        `c1` datetime NOT NULL,
      		 
        `c2` varchar(10) CHARACTER SET utf8 NOT NULL
      		 
      ) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
      		 
      +-------+-------------------------------------------------------------------------------------------------------------------------------------+

      Notice, the data type for the column c2 is too short.

      Attachments

        Issue Links

          blocks

          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
          relates to

          Task - A task that needs to be done. MDEV-12506 Split Item_func_min_max::fix_length_and_dec() into methods in Type_handler

          • Major - Major loss of function.
          • Closed

          Activity

            People

              bar Alexander Barkov
              bar Alexander Barkov
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              Dates

                Created:
                Updated:
                Resolved:

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