Alternative implementation of get_wkt()

Question

I`m turning into a performance problem with the spatial function get_wkt(), and equivalently
to_wktgeometry(). There is no way to get around this, since I need the "string"-representation of the objects, of interesections, of concatenations and so on.
Currently, I fetch time at 100 records a second, which is definitely too slow, as I need to fetch 50.000 records and much much more.
Is there a way to get around this performance problem?
Is there a way to quickly build/get the WKT representation of objects?
This would really help me.
Thanks a lot.

Answer 1

Based on my last post here's some example code which I have found works quite well and may work well for large loads:
import java.io.BufferedReader;
import java.sql.Connection;
import oracle.sql.CLOB;
import java.sql.*;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.io.IOException;
import oracle.jdbc.driver.OracleDriver;
import oracle.sql.STRUCT;
import oracle.spatial.util.*;
public class getWKT
public getWKT()
protected static Connection m_conn;
public static String CLOB2String(CLOB cl) throws IOException, SQLException
if (cl == null)
return "";
StringBuffer strOut = new StringBuffer();
String aux;
BufferedReader br = new BufferedReader(cl.getCharacterStream());
while ((aux=br.readLine())!=null)
strOut.append(aux);
return strOut.toString();
public static void main(String[] args) throws SQLException, IOException
getWKT wkt = new getWKT();
Statement stmt = null;
ResultSet rslt = null;
STRUCT geom = null;
Connection conn = null;
try {
DriverManager.registerDriver(new OracleDriver()) ;
m_conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "oragis", "oragis"); }
catch(SQLException e) { e.printStackTrace();}
stmt = m_conn.createStatement();
rslt = stmt.executeQuery("select geom " +
"from counties " +
"where sdo_filter (geom, sdo_geometry(2003,8307,null," +
"sdo_elem_info_array(1,1003,3)," +
"sdo_ordinate_array (-75,40,-74,41))) = 'TRUE'");
CLOB wktCLOB;
Adapters geomAdapters = new Adapters();
while (rslt.next()) {
geom = (STRUCT) rslt.getObject(1);
wktCLOB = geomAdapters.structToWkt(geom,m_conn);
System.out.println(wkt.CLOB2String(wktCLOB));
stmt.close();
rslt.close();
m_conn.close();
-Justin