Performance of Inserting Rows with a ResultSet

JDBC for Oracle - Herong's Tutorial Examples

∟Performance of Inserting Rows with a ResultSet

This section describes how to measure the performance of inserting rows using a ResultSet object.

Since ResultSet objects can also be used to insert rows, I wrote the following Java sample program to measure the performance of inserting multiple rows using a ResultSet object:

/* OraclePerformanceResultSet.java
 * Copyright (c) HerongYang.com. All Rights Reserved.
 */
import java.sql.*;
public class OraclePerformanceResultSet {
  public static void main(String [] args) {
    Connection con = null;
    try {
      oracle.jdbc.pool.OracleDataSource ds
        = new oracle.jdbc.pool.OracleDataSource();
      ds.setDriverType("thin");
      ds.setServerName("localhost");
      ds.setPortNumber(1521);
      ds.setDatabaseName("XE");
      ds.setUser("Herong");
      ds.setPassword("TopSecret");
      con = ds.getConnection();

// Delete all rows from the table
      Statement sta = con.createStatement();
      sta.executeUpdate("DELETE FROM Profile");

// Start the test
     int count = 10000;
     long t1 = System.currentTimeMillis();

// ResultSet to insert rows
      Statement rs = con.createStatement(
        ResultSet.TYPE_FORWARD_ONLY,
        ResultSet.CONCUR_UPDATABLE);

      ResultSet res = rs.executeQuery("SELECT * FROM Profile");
      res.moveToInsertRow();
      java.util.Random r = new java.util.Random();
      for (int i = 0; i < count; i++) {
        res.updateInt("ID", i+1);
        res.updateString("FirstName",
          Integer.toHexString(r.nextInt(9999)));
        res.updateString("LastName",
          Integer.toHexString(r.nextInt(999999)));
        res.insertRow();
      }
      rs.close();

// End the test
     long t2 = System.currentTimeMillis();
     System.out.println("ResultSet insert "+count
         +" rows with "+(t2 -t1) +" milliseconds");

      con.close();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

Unfortunately, this Oracle JDBC driver does not support updatable result sets. I am getting this execution error:

java.sql.SQLException: Invalid operation for read only resultset:
  moveToInsertRow
  at oracle.jdbc.driver.BaseResultSet.moveToInsertRow(...)
  at OraclePerformanceResultSet.main(...)