Help Primary Key generation
According to article "Generating Primary Key Values in CMP Beans" (http://www.netbeans.org/kb/41/generated-primary-keys.html) you can specifiy automatic primary key generation.
The following fragment describes a key issue when you have a existing database schema.
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If the database schema is not created during deployment, the primary key column in the mapped table must be of type NUMERIC with a precision of 19 or more, and must not be mapped to any CMP field. The Sun Java System Application Server generates unique values for the primary key column at runtime.
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In the used sample for how to set up a MySql database the creation of the customer table must be as follows:
CREATE TABLE customer (
id BIGINT(19) NOT NULL auto_increment, -- this column will be automat. generated
lastName varchar(25) NOT NULL,
firstName varchar(30) default NULL,
PRIMARY KEY (id));
My question is:
Is it nescesary to have the field id to be decleared auto incremented?
The first fragment says that the AS will create new values for the primary key. Or does the generation of primary keys only work if the pk field in the database table is auto incremented by the database?
Please help. Thanks!
Johan.
