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  1. MariaDB Server
  2. MDEV-28401

incorrect behavior of ALTER ... COLUMN IF [NOT] EXISTS

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      Description

      create table t (c date);
      alter table t change column if exists n c int unique;
      

      this should fail, because the column n does not exist. But it partially succeeds, the result is c date unique.

      Another example, for ADD IF NOT EXISTS:

      create table t (c date);
      alter table t add column if not exists c int unique;
      

      Same effect.

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            Assignee:
            sanja Oleksandr Byelkin
            Reporter:
            serg Sergei Golubchik
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              Updated:

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