check the mapping file use extends key word when defining a class and a parent class
<class name="C" extends="P" identity="id"> </class> -----Original Message----- From: Anand Janakiraman [mailto:[EMAIL PROTECTED] Sent: Friday, March 28, 2003 12:49 PM To: [EMAIL PROTECTED] Subject: [castor-dev] Child table with only one column. Hi, We have the followign scenario, while using JDO: Parent class P with two fields: int id; string p; Class C which extends P, with field id, and a many-to-many association to Class A: int id; Vector a; The database tables look as follows: table P: id int PK p varchar table C: id int PK (linking) table CA: c_id int a_id int now, when a db.update is called on an object of class C, castor throws the following exception : java.sql.SQLException: ORA-01747: invalid user.table.column, table.column, or column specification problem is that the update statement for C, reads as: UPDATE "C" SET WHERE "id"=? since the table does not have any columns (or attributes) - only associations - the update statement doesnt read correctly.. how do we avoid the problem? thanks, anand. ----------------------------------------------------------- If you wish to unsubscribe from this mailing, send mail to [EMAIL PROTECTED] with a subject of: unsubscribe castor-dev ----------------------------------------------------------- If you wish to unsubscribe from this mailing, send mail to [EMAIL PROTECTED] with a subject of: unsubscribe castor-dev
