The built-in InnoDB in MySQL can only open tables that were created in
        REDUNDANT or COMPACT format. Starting with MySQL version
        5.0.21, an attempt to open a table in some other format results
        in ERROR 1146 (42S02): Table
        '.
        Furthermore, a message “test.t' doesn't existunknown table
        type” appears in the error log.
      
        In the InnoDB storage engine, you may rebuild an incompatible table by
        issuing a statement ALTER TABLE
        .
      table_name
        ROW_FORMAT=COMPACT
This is the User’s Guide for InnoDB storage engine 1.1 for MySQL 5.5, generated on 2010-04-13 (revision: 19994) .

