Getting ResultSet from Oracle procedure

Question

I am trying to get a ResultSet object by executing a stored procedure in Oracle.
The ResultSet is one of the parameters of this procedure. Typical code:
CallableStatement st = cn.prepareCall("{ call sc_getkeyfieldinfo(?,?) }");
st.setMaxRows(2); //this doesnt do anything
st.setString(1, "T11_2003_1");
st.registerOutParameter(2, OracleTypes.CURSOR);
st.execute();
ResultSet rs = (ResultSet) st.getObject(2);
while (rs.next()) {
System.out.println(rs.getString(1));
How would I get only certain number of rows in my ResultSet ? The setMaxRows on a callable statement did not do anything. Neither does the setFetchSize().
When we get a ResultSet directly by executing a query from a Statement, these maxSize and fetchSize parameters set there do the job and return a ResultSet of specified size(# of rows). But on a CallableStatement it didn't do anything.
Anyone knows how to achieve this ?????
Amit

Answer 1

I'm not sure there is a way to do it automatically in the driver.
Two possible ways are:
(A) Limit the number of rows selected in the stored procedure, potentially by adding another parameter indicating the number of rows you'd like. Modify the select to do something like and rownum < 10(B) Only process the number of rows that you actually want; this may be less than ideal if the total set of records from which you're choosing a limited number if large. E.g.
int count = 0;
while (count++ <= 2 && rs.next()) {
  // Process the row
}I'd be interested to know exactly what happens in the Oracle dirver when you use "setMaxRows" anyway... does it modify your query or does it simply stop returning results after that number.
Tim