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  1. MariaDB ColumnStore
  2. MCOL-4872

HEX hybrid is treated as a number in string context

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    Details

    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 5.6.2
    • Fix Version/s: 22.08
    • Component/s: PrimProc
    • Labels:
      None

      Description

      I run the following SQL script with a MyISAM table:

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a CHAR(4)) ENGINE=MyISAM;
      INSERT INTO t1 VALUES ('122'),('z');
      SELECT CONCAT(a, 0x7A) FROM t1;
      SELECT * FROM t1 WHERE a=0x7A;
      

      It returns these results:

      +-----------------+
      | CONCAT(a, 0x7A) |
      +-----------------+
      | 122z            |
      | zz              |
      +-----------------+
      

      +------+
      | a    |
      +------+
      | z    |
      +------+
      

      Now I repeat the same script with ColumnStore:

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a CHAR(10)) ENGINE=ColumnStore;
      INSERT INTO t1 VALUES ('122'),('z');
      SELECT CONCAT(a, 0x7A) FROM t1;
      SELECT * FROM t1 WHERE a=0x7A;
      

      It returns different results:

      +-----------------+
      | CONCAT(a, 0x7A) |
      +-----------------+
      | 122122          |
      | z122            |
      +-----------------+
      

      +------+
      | a    |
      +------+
      | 122  |
      +------+
      

      It seems a hex hybrid is always treated as a number in ColumnStore.

      It should be fixed to behave like in MariaDB:

      • as a character string in string context
      • as a number in numeric context

      The same problem is repeatable with VARCHAR and TEXT instead of CHAR.

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              Assignee:
              David.Hall David Hall
              Reporter:
              bar Alexander Barkov
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                Dates

                Created:
                Updated:

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