MySQL Exception: Execute SQL Transaction - mysql

Question

I am trying to commit a sql transaction to MySQL but I get myself past an MySQLSyntaxErrorException.
The code I am using is:
implicit connection =>
SQL("""
start transaction;
insert into projects(id_user, name, description) values({idUser}, {name}, {description});
set #last_id = last_insert_id();
insert into assigned(id_user, id_project) values({idUser}, #last_id);
commit;
""")
.on('idUser -> idUser,
'name -> project.name,
'description -> project.description
).execute()
The exception I get:
[MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'insert into projects(id_user, name, description) values(1, 'First inserted proje' at line 1]
I am starting to think that I can't execute such statements at all with Anorm.

Answer 1

You cannot use transaction that way. You have to understand that anorm is simply a wrapper around existing jdbc libraries. By default, when using the withConnection and SQL :
DB.withConnection { conn =>
SQL("...
}
Your query is transformed using a PreparedStatement. Meaning the ; chars are causing errors.
Thus, if you want to use transaction, you have to use anorm's mecanism for that.
DB.withTransaction { conn =>
SQL("...
}