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  1. MariaDB Server
  2. MDEV-10181

Illegal mix of collation for a field and an ASCII string as a view field

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 5.5, 10.0, 10.1, 10.2
    • 5.5.50
    • Character Sets
    • None
    • 5.5.50

    Description

      This problem was originally reported by email by David Hall.

      This script:

      SET NAMES utf8;
      		 
      DROP TABLE IF EXISTS t1;
      		 
      CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET latin1);
      		 
      DROP VIEW v1;
      		 
      CREATE VIEW v1 AS SELECT 'a';
      		 
      SELECT * FROM v1,t1 where t1.a=v1.a;

      returns an error:

      ERROR 1267 (HY000): Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='

      This is wrong. The string constant in the view is pure ASCII so it can be safely converted to the character set of the field.

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            bar Alexander Barkov
            bar Alexander Barkov
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            Dates

              Created:
              Updated:
              Resolved:

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