Updatable/scrollable java.sql.ResultSet + BC4J + Jdeveloper

Question

Hi ,
Can any one help me out how to get Updatable/scrollable ResultSet in bc4j.
I want to count to total no of row in my application . so i have written below code ,
dbTrans = this.getDBTransaction();
PreparedStatement prpmd = dbTrans.createPreparedStatement(query,DBTransaction.DEFAULT);
ResultSet rst = prpmd.executeQuery();
if(rst.next())
if (rst.last())
totalRecods = rst.getRow()
but above code give the exception "Invalid operation for forward only resultset : last "

Answer 1

        String sql = "SELECT COUNT(*) FROM table";
        PreparedStatement prest = con.prepareStatement(sql);
        ResultSet rs = prest.executeQuery();
        while (rs.next()){
          records = rs.getInt(1);
        }not sure whether this will be feasible in your case.
else
Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE); //creates scrollable resultset
rs = stmt.executeQuery(sqlString);
// Point to the last row in resultset.
rs.last();
// Get the row position which is also the number of rows in the ResultSet.
int rowcount = rs.getRow();
//position to first
rs.beforeFirst();Note incase of 2nd style if the resultset has huge data then traversing to last will be a time consuming process.
You can also consider using CachedRowSet http://onjava.com/pub/a/onjava/2004/06/23/cachedrowset.html based on your requirement.