JoinRowSet : Multiple Columns as the MatchColumn

Question

Hi All,
RE: JoinRowSet : Multiple Columns as the MatchColumn
I spent one day and have been trying to join two tables with two columns as a JOIN match... cannot made anything work. I read all the doc and the JDBC RowSet Implementations Tutorial doesn't really help a lot.
Any example will be appreciated.
Connection con = DriverManager.getConnection(dbUrl,dbUserId,dbPasswd);
Statement stmt8 = con.createStatement();
ResultSet rs = stmt8.executeQuery("select project_id, bld_id, bld_name from table1");
Statement stmt10 = con.createStatement();
ResultSet rs3 = stmt10.executeQuery("select project_id, bld_id, project_name from table2");
CachedRowSet crs3 = new CachedRowSetImpl();
crs3.populate( rs);
System.out.println("Size of the first cached rowset is:: "+crs3.size());
CachedRowSet crs4 = new CachedRowSetImpl();
rs.beforeFirst();
crs4.populate( rs);
System.out.println("Size of the first cached rowset is:: "+crs4.size());
JoinRowSet jrs = new JoinRowSetImpl();
System.out.println("Adding 1st crs :: "+crs3.size());
int [] idArray = {1,2};
crs3.setMatchColumn(idArray);
jrs.addRowSet(crs3);
crs4.setMatchColumn(idArray);
jrs.addRowSet(crs4);
     FileWriter fWriter;
fWriter = new FileWriter("myoutput.xml");
jrs.writeXml(fWriter);
fWriter.flush();
fWriter.close();

Answer 1

I have no idea this is what you are trying but look at this.
String select Statement = "select table1.project_id, table1.bld_id, table1.bld_name, table2.project_name from table1 left join table2 on table1.project_id = table2.project_id and table1.bld_id = table2.bld_id where ... order ...";
Statement stmt8 = con.createStatement();
ResultSet rs = stmt8.executeQuery(select Statement );The joined data is in rs.
rykk