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  1. MariaDB Server
  2. MDEV-29345

update case insensitive (large) unique key with insensitive change of value - duplicate key

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      create table x (id int auto_increment primary key, name varchar(2048) collate utf8_general_ci, unique key u(name));
      		 
      insert into x values (1,'test');
      		 
      update x set name = "Test" where id=1
      		 
       
      		 
      Duplicate entry 'Test' for key 'u

      A smaller varchar length ~200 will not generate an error.

      Suspected MDEV-371 regression.

      source: https://www.reddit.com/r/mariadb/comments/wu83pe/change_case_with_unique_constraint/

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          is caused by

          Task - A task that needs to be done. MDEV-371 Unique indexes for blobs

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. MDEV-34052 long uniques false positive when a row value changes letter case

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27653 long uniques don't work with unicode collations

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

          Web Link SO user hit this

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              serg Sergei Golubchik
              danblack Daniel Black
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              Dates

                Created:
                Updated:
                Resolved:

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