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  1. MariaDB ColumnStore
  2. MCOL-4622

Implicit FLOAT->INT and DOUBLE->INT conversion is not like in InnoDB

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    Details

    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 5.6.1, 6.1.1, 5.5.1
    • Fix Version/s: 6.3.1
    • Component/s: PrimProc
    • Labels:
      None

      Description

      The problem reported in MCOL-4619 (for DECIMAL) is also repeatable with implicit FLOAT->INT and DOUBLE->INT conversion:

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a VARCHAR(32), d FLOAT) ENGINE=ColumnStore;
      INSERT INTO t1 VALUES ('aaaa', 1.5);
      SELECT LEFT(a, d) FROM t1;
      

      +------------+
      | LEFT(a, d) |
      +------------+
      | a          |
      +------------+
      

      Looks wrong. It returns 'aa' with InnoDB.

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a VARCHAR(32), d DOUBLE) ENGINE=ColumnStore;
      INSERT INTO t1 VALUES ('aaaa', 1.5);
      SELECT LEFT(a, d) FROM t1;
      

      +------------+
      | LEFT(a, d) |
      +------------+
      | a          |
      +------------+
      

      Looks wrong. It returns 'aa' with InnoDB.

      Note, the problem is not repeatable with explicit CASTs:

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (f FLOAT, d DOUBLE) ENGINE=ColumnStore;
      INSERT INTO t1 VALUES (1.5, 1.5);
      SELECT CAST(f AS SIGNED), CAST(d AS SIGNED) FROM t1;
      

      +-------------------+-------------------+
      | CAST(f AS SIGNED) | CAST(d AS SIGNED) |
      +-------------------+-------------------+
      |                 2 |                 2 |
      +-------------------+-------------------+
      

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              Assignee:
              bar Alexander Barkov
              Reporter:
              bar Alexander Barkov
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                Dates

                Created:
                Updated:

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