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MySQL 8.0 Reference Manual  /  MySQL Data Dictionary  /  Data Dictionary Limitations

14.8 Data Dictionary Limitations

This section describes temporary limitations introduced with the MySQL data dictionary.

  • Manual creation of database directories under the data directory (for example, with mkdir) is unsupported. Manually created database directories are not recognized by the MySQL Server.

  • DDL operations take longer due to writing to storage, undo logs, and redo logs instead of .frm files.


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