Shadow wrote on Jun 25 2003, 11:52 AM:
Primary key length cannot be set when creating a table. This bug prevents columns of certain types (such as blobs) to be declared as primary key because MySql requires a key length for these types. The manual way still works, of course.
This feature is in the TO-DO list of SQLyog Max. You can still set Primary Key for BLOB values using Table->Manage Indexes… option.
HTH