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  1. MariaDB ColumnStore
  2. MCOL-4671

LEFT(str, negativeInt) returns a wrong result

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 5.6.1, 6.1.1, 23.10.1
    • 23.10.3
    • PrimProc
    • None
    • 2024-2

    Description

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a TINYINT) ENGINE=ColumnStore;
      INSERT INTO t1 VALUES (-1);
      SELECT LEFT('abc',a) FROM t1;
      

      +---------------+
      | LEFT('abc',a) |
      +---------------+
      | abc           |
      +---------------+
      

      Looks wrong. The expected result is:

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a TINYINT) ENGINE=InnoDB;
      INSERT INTO t1 VALUES (-1);
      SELECT LEFT('abc',a) FROM t1;
      

      +---------------+
      | LEFT('abc',a) |
      +---------------+
      |               |
      +---------------+
      

      The same problem is repeatable with functions:

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a TINYINT) ENGINE=ColumnStore;
      INSERT INTO t1 VALUES (-1);
      SELECT LEFT('abc',COALESCE(a,a)) FROM t1;
      

      +---------------------------+
      | LEFT('abc',COALESCE(a,a)) |
      +---------------------------+
      | abc                       |
      +---------------------------+
      

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              AlexanderPresniakov Alexander Presniakov
              bar Alexander Barkov
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              Dates

                Created:
                Updated:
                Resolved:

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