grails/gorm/mysql/hibernate -

i have simples question. have been trying learn grails own, , managed simple application using grails/gorm.

1 ) later, decided use mysql instead of gorm - needed configure 'datasource' , download driver.

2 )so if want use hibernate between both (grails , mysql) this: http://www.grails.org/doc/latest/guide/15.%20grails%20and%20hibernate.html, need make 'hibernate.cfg.xml' file, , specify mysql database url, user, pw etc .. , have map each class in grails mysql columns.

so diference between 1) , 2) ? , hibernate does. give examples if possible

ps. please correct me if said wrong, im kinda new this

i think bit confused here.

gorm not database, orm maps groovy classes database tables. uses hibernate under covers achieve (hibernate orm).

the default database grails uses in-memory hsql db. if want use mysql instead of that, need change settings in conf/datasource.groovy.

you don't need create hibernate xml files. part of documentation you've linked allow people existing hibernate domain models re-use them.

hope helps clear things up.

cheers

lee