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  1. MariaDB Server
  2. MDEV-8680

Wrong result for SELECT..WHERE a IN ('a' COLLATE latin1_bin,'b') AND a='a'

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      SET NAMES latin1;
      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a VARCHAR(10));
      INSERT INTO t1 VALUES ('a'),('A');
      SELECT * FROM t1 WHERE a IN ('a' COLLATE latin1_bin,'b');
      SELECT * FROM t1 WHERE a IN ('a' COLLATE latin1_bin,'b') AND a='a';

      The first SELECT correctly returns one row.
      The second SELECT erroneously returns two rows. One row is expected.

      The problem happens in equal field propagation.

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