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  1. MariaDB Server
  2. MDEV-28332

Alter on temporary table causes ER_TABLE_EXISTS_ERROR note

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      Description

      MDEV-12459 introduced a note upon creation of a temporary table which shadows an existing base table; it looks quite natural.
      However, this note is also produced upon ALTER of such a table. That is not natural, even though may be understandable from the technical point of view.

      create table t (a int);
      create temporary table t (b int);
      alter table t add c int;
       
      # Cleanup
      drop temporary table t;
      drop table t;
      

      preview-10.9-MDEV-20119-misc c906db30

      alter table t add c int;
      Warnings:
      Note	1050	Table 't' already exists
      

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              Assignee:
              monty Michael Widenius
              Reporter:
              elenst Elena Stepanova
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