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  1. MariaDB Server
  2. MDEV-18968

Both (WHERE 0.1) and (WHERE NOT 0.1) return empty set

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      Description

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a INT);
      INSERT INTO t1 VALUES (10);
      SELECT CASE WHEN 0.1 THEN 'TRUE' ELSE 'FALSE' END FROM t1;
      

      +--------------------------------------------+
      | CASE WHEN 0.1 THEN 'TRUE' ELSE 'FALSE' END |
      +--------------------------------------------+
      | TRUE                                       |
      +--------------------------------------------+
      

      The above script demonstrates:

      • 0.1 is evaluated to TRUE when in CASE
      • there is one record in the table t1

      Now I run these two queries:

      SELECT * FROM t1 WHERE 0.1;
      

      Empty set (0.00 sec)
      

      SELECT * FROM t1 WHERE NOT 0.1;
      

      Empty set (0.00 sec)
      

      Notice, both return empty set. Looks wrong. The query with WHERE 0.1 should return one record.

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              • Assignee:
                bar Alexander Barkov
                Reporter:
                bar Alexander Barkov
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                • Created:
                  Updated:
                  Resolved: