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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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      Description

      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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          Bug - A problem which impairs or prevents the functions of the product. MDEV-8728 Fix a number of problems in equal field and equal expression propagation

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-8698 Wrong result for SELECT..WHERE a BETWEEN 'a' AND 'c' COLLATE latin1_bin;

          • Major - Major loss of function.
          • Closed

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

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