Where I'm wrong

Question

Hello,
I use a Centura Database
I want to read a file and then insert some data from each line into a database. The file I read has at least 640 lines. Everything works for 81 lines readed but then, I receive the following error message :
" SQLException
java.sql.SQLException: com.centurasoft.java.sqlbase.SqlbaseException: 00135 SQL ICN Invalid cursor number "
Please tell me what shoul I do.
I have a table "UST" with 3 columns : PROD_TYPE(String), CAR_ID(String) , COST(int);
Here is the code I use to insert and to update when is neccesary some data into database.
public void insert_update(String prod, String car_id, int cost) {
try {
this.setCursor( new Cursor( Cursor.WAIT_CURSOR ) );
Statement stat = this.dbConnection.createStatement();
Statement stat1 = this.dbConnection.createStatement();
Statement stat2 = this.dbConnection.createStatement();
int value1;
String sql = "SELECT COST FROM UST WHERE (PROD_TYPE = '" + prod + "' AND CAR_ID = '" + car_id + "')";
ResultSet rs = stat.executeQuery( sql );
if( rs.next() ) {
value1 = rs.getInt(1);
int new_value = value1 + cost;
rs.close();
String query = "UPDATE UST SET COST = '" + new_value + "' WHERE (PROD_TYPE = '" + prod + "' AND CAR_ID = '" + car_id + "')";
int result = stat1.executeUpdate( query );
else {
rs.close();
stat2.executeUpdate( "INSERT INTO UST VALUES('" + prod + "','" + car_id + "','"+ cost +"' )");
dbConnection.commit();
this.setCursor( Cursor.getDefaultCursor() );
catch ( SQLException sqlex ) {
System.err.println( "SQLException\n" + sqlex.toString());
return;
}

Answer 1

hi
you should use only one statement and
You must call statement.close();