Java.sql.Statement.setFetchSize(int) option for non-scrollable result sets

Question

Hello!
Our tests indicate that fetch size option mentioned makes visible difference in performance for non-scrollable result sets also. In the same time, it seems there is no way to set this option for such result sets at TopLink level, and default fetch size is always used instead.
Can somebody propose a solution for this, I mean a way to specify custom fetch size (for results without any scrolling)?
Thanks,
Sergey

Answer 1

To set the JDBC fetch size for a query, use the following APIs:
int desiredFetchSize = 500;
ReadAllQuery query = new ReadAllQuery(YourClass.class);
CallQueryMechanism queryMechanism =
(CallQueryMechanism) query.getQueryMechanism();
DatabaseCall call = queryMechanism.getCall();
call.setResultSetFetchSize(desiredFetchSize);
If you wish to set the fetch size for all queries, consider using named queries for all queries (see the TopLink documentation for more information on named queries), and then configure them on startup.
Information taking from Metalink Note:237093.1