Question

I am using spring with hibernate. my database is oracle. i want to update/save records with sysdate. we can insert/update sysdate using HQL. but i dont know how to insert sysdate using Criteria. please help me.

Thanks!

Answer 1

There doesn’t seem to be a straightforward manner to use sysdate in a HQL insert/update statement. You can use the current_timestamp() function in HQL selects, but not in update/insert.

The question is not clear regarding if you need to do this update in some isolate situations, or if this column will always have the database’s date in the moment of insertion/any update of the Entity.

• In case it is isolated updates that you need: You could workaround this by defining a property in your entity that would always hold sysdate, by means of @Formula(value="select sysdate from dual"). If this property was named sysdate, you could achieve this by doing update MyEntity e set e.myDate = e.sysdate. Take into account that this approach introduces direct dependency to Oracle.

• In case the column is to be always updated with the database’s timestamp whenever an update on the Entity occurs, use the approach @UdoFholl pointed out in his comments, or use a trigger (if you have that level of control on the database) and annotate the field with @Generated.