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  1. MariaDB Server
  2. MDEV-3440

LP:822760 - Wrong result with view + invalid dates

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Minor
    • Resolution: Fixed
    • None
    • None
    • None

    Description

      If invalid dates are used in a query against a view, the query will return rows that do not match the HAVING predicate.

      test case:

      DROP TABLE t1;
      CREATE TABLE t1 ( col_date_key date) ;
      INSERT IGNORE INTO t1 VALUES ('0000-00-00');

      CREATE OR REPLACE VIEW v1 AS SELECT * FROM t1;

      SELECT col_date_key AS field2 FROM t1 HAVING field2 = 'zz' AND field2 <= 'aa' ;

      -> no rows returned, impossible where, no warnings

      SELECT col_date_key AS field2 FROM v1 HAVING field2 = 'zz' AND field2 <= 'aa' ;

      -> 1 row returned, 2 warnings

      explain:

      MariaDB [test]> explain SELECT col_date_key AS field2 FROM v1 HAVING field2 = 'zz' AND field2 <= 'aa' ;
      ---------------------------------------------------------------+

      id select_type table type possible_keys key key_len ref rows Extra

      ---------------------------------------------------------------+

      1 SIMPLE t1 system NULL NULL NULL NULL 1  

      ---------------------------------------------------------------+
      1 row in set (0.00 sec)

      bzr version-info

      revision-id: <email address hidden>
      date: 2011-08-05 22:07:06 +0400
      build-date: 2011-08-08 18:27:13 +0300
      revno: 3141
      branch-nick: maria-5.3

      Repeatable in maria-5.3 both before and after WL#106. Not repeatable in maria-5.2, mysql-5.5

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            serg Sergei Golubchik
            philipstoev Philip Stoev (Inactive)
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              Updated:
              Resolved:

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