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  1. MariaDB Server
  2. MDEV-20292

REPEAT(x,-1) returns a wrong data type

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 5.5(EOL), 10.0(EOL), 10.1(EOL), 10.2(EOL), 10.3(EOL), 10.4(EOL)
    • 10.3.18, 10.4.8
    • Data types
    • None

    Description

      CREATE OR REPLACE TABLE t1 (i BIGINT);
      		 
      INSERT INTO t1 VALUES (42);
      		 
      CREATE OR REPLACE TABLE t2 AS SELECT
      		 
        REPEAT(i,0) AS c0,
      		 
        REPEAT(i,-1) AS c1
      		 
      FROM t1;
      		 
      SHOW CREATE TABLE t2;


      +-------+------------------------------------------------------------------------------------------------------------------------------------------------------------+
      		 
      | Table | Create Table                                                                                                                                               |
      		 
      +-------+------------------------------------------------------------------------------------------------------------------------------------------------------------+
      		 
      | t2    | CREATE TABLE `t2` (
      		 
        `c0` char(0) CHARACTER SET utf8 DEFAULT NULL,
      		 
        `c1` longtext CHARACTER SET utf8 DEFAULT NULL
      		 
      ) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
      		 
      +-------+------------------------------------------------------------------------------------------------------------------------------------------------------------+

      It's expected that c1 also creates a column of the `char(0)` data type.

      This problem causes ColumnStore to crash, see MDEV-20085 for details.

      Attachments

        Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. MDEV-20085 Negative count causes SQL repeat() to set expected result length to 16MB instead of 0

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-20303 SPACE(-1) returns a wrong data type

          • 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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