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  1. MariaDB Server
  2. MDEV-8671

Wrong result for SELECT..WHERE varchar_column=' 1' AND (varchar_column XOR '1')

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      Description

      This script:

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET cp1251 COLLATE cp1251_ukrainian_ci);
      INSERT INTO t1 VALUES (' 1'),('`1'); 
      SELECT * FROM t1 WHERE (a XOR '0');

      returns one row:

      +------+
      | a    |
      +------+
      |  1   |
      +------+

      Now if I make the WHERE condition even stricter:

      SELECT * FROM t1 WHERE a=' 1' AND (a XOR '0');

      it erroneously returns two rows:

      +------+
      | a    |
      +------+
      |  1   |
      | `1   |
      +------+

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