In the reverse engineering of the mysql database, hinernatemysql cannot generate the primary/foreign key relationship.

In the reverse engineering of the mysql database, hinernatemysql cannot generate the primary/foreign key relationship.

(1) When we use the hibernate reverse engineering tool that comes with myeclipse for SSH development of large ※※project, it was found that the one-to-one primary key relationship could not be generated. Obviously, the database had a primary key relationship. why is reverse generation unavailable?

(2) First, I am using the MySQL database that comes with Appserv in the PHP development environment. It is not separately installed;

(3) This is because of database engine problems,

Run the show engines command in the SQL command line;

The default value is MyISAM;

(3) "MyISAM database engine does not support transaction processing or foreign keys" should be changed to InnoDB database engine;

(4) There are two ways to modify the Database Engine: one is to use the command alter table name type = InnoDB; to modify the engine, but I did not try it successfully;

The second method is to find the my. ini file in the configuration file. After reading the file, you can clear the comment and restart the database.

(5) but an error in this method is that the server cannot be started!