Hi
Has anyone used ResultSet.first(), ResultSet.beforeFirst(), ResultSet.AfterLast(), ResultSet.absolute(1) methods
in your JSP code, while connecting to SQL Server 2000, using MS SQLSERVER JDBC driver SP2 ?
I am hving problems with it., as it keeps throwing the msg, SQLSERVER 2000 driver for JDBC - unsupported mehod error for all the above calls. I am using JRUN server on DM2k MX to run my JSP.
I would appreciate your replies,
Thanks
Suma
"SumaJDBC" <anonymous@.discussions.microsoft.com> wrote in message
news:015E27EC-8BFC-49B6-96FD-669661A86912@.microsoft.com...
> Hi
> Has anyone used ResultSet.first(), ResultSet.beforeFirst(),
ResultSet.AfterLast(), ResultSet.absolute(1) methods
> in your JSP code, while connecting to SQL Server 2000, using MS SQLSERVER
JDBC driver SP2 ?
> I am hving problems with it., as it keeps throwing the msg, SQLSERVER 2000
driver for JDBC - unsupported mehod error for all the above calls. I am
using JRUN server on DM2k MX to run my JSP.
> I would appreciate your replies,
> Thanks
> Suma
What do you not understand about the error message? The calls are not
supported by the driver. In general it is best to stay away from them
anyway, simply stick to next(). It will give you optimal performance and
works on all JDBC drivers.
Silvio Bierman
|||Hi silvio
Thanks for your reply. I did use next(), but I am having wierd problem with that . I have to construct a dropdown box
, populating it from the database table values.
I connect to the DB, retrieve the required column values into the result set rs.
As I display the values , the first record is always being skipped and it is always picking up from second record onwards. Now can now U understand why I need to place rs.beforeFirst(), prior to the starting of that while loop!
or is there any other way of doing this? I am new to this , thus would appreciate an expert advice!
here's my scriptlet after (connection to the Db and populatinf the ResultSet rs (using a javabean (db) class for this )
try{
//rs.beforeFirst();
while(rs.next()) {
%><option value=<%=rs.getString("DeptName")%></option><BR><%
}
} catch (Exception e) {
msg = e.getMessage();
out.println(msg);
}
%><% db.close();%></select>
|||"SumaJDBC" <anonymous@.discussions.microsoft.com> wrote in message
news:3D950D2F-8ACE-468E-97AD-A6D33DDCC897@.microsoft.com...
> Hi silvio
> Thanks for your reply. I did use next(), but I am having wierd problem
with that . I have to construct a dropdown box
> , populating it from the database table values.
> I connect to the DB, retrieve the required column values into the result
set rs.
> As I display the values , the first record is always being skipped and it
is always picking up from second record onwards. Now can now U understand
why I need to place rs.beforeFirst(), prior to the starting of that while
loop!
> or is there any other way of doing this? I am new to this , thus would
appreciate an expert advice!
> here's my scriptlet after (connection to the Db and populatinf the
ResultSet rs (using a javabean (db) class for this )
> try{
> //rs.beforeFirst();
> while(rs.next()) {
>
> %><option value=<%=rs.getString("DeptName")%></option><BR><%
> }
> } catch (Exception e) {
> msg = e.getMessage();
> out.println(msg);
> }
> %><% db.close(); %></select>
I have heard that problem previously several times and each time it was an
error in the application code that caused the behaviour. Using
ResultSet rs = ...;
while (rs.next()) //process current row
should work always. If it doesn't something is seriously broken and the
methods you mention can;t help you. I would suggest you post some actual
code that produces the behaviour.
Silvio Bierman
|||Hi Silvio,
As U suggested I tried to look into my code for possible logical errors, but couldnt find any,. So I am posting my code below:
Thanks in advance (again) for taking time to answer my queries.
Suma
// This is DbConnection.java, the bean class for getting the DBconnection and excecuting DB related methods
package BeanClasses;
import java.sql.*;
import java.io.*;
import java.lang.*;
public class DbConnection{
String dbURL = "jdbc:microsoft:sqlserver://sql1;databaseName=DEVPurContr";
String dbDriver = "com.microsoft.jdbc.sqlserver.SQLServerDriver" ;
private Connection dbCon;
public String temp;
public String getTemp() { return temp;
}
public void setTemp (String Temp){
this.temp = Temp;
}
public DbConnection() {
super();
/*try {
connect();
} catch (Exception e) { }*/
}
public boolean connect () throws Exception { //This functionis called first get a valid connection
try{
Class.forName("com.microsoft.jdbc.sqlserver.SQLSer verDriver");
dbCon = DriverManager.getConnection(dbURL,"webuser","webus er3070");
}
catch (Exception e) { System.out.println(e.getMessage());
}
return true;
}
public void close() throws SQLException {
dbCon.close();
}
public ResultSet execSQL (String sql) throws SQLException { //This function is called to retrive the result set
// String (sql) is supplied at the run time, which is my select statement and the returned
// result set.
Statement s = dbCon.createStatement();
ResultSet r = s.executeQuery(sql);
return (r==null) ? null : r;
}
public int execUpdate (String sql ) throws SQLException {
Statement s = dbCon.createStatement ();
int r = s.executeUpdate (sql);
return (r==0) ? -1 : r ;
}
}
// Here's my import , where I am importing relevant java packages
<%@. page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*,java.util.*,java.lang.*,java.io .*" errorPage="" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head>
// Heres's JSP code (relevant part )
<tr><td class="RequiredDetail" style="text-align:left;"><span style="color:white; font-size:10px; font-weight:bolder"></span>
Enter Department Name
</td><td style="text-align:right;"><select name="DeptName"><%
ResultSet rs = null;
int i;
%><%
String msg;
db.connect(); // Call to the bean
try {
rs = db.execSQL("SELECT distinct DeptName FROM tblDepartment order by DeptName" ); // call to the bean
} catch(Exception e) {
msg = e.getMessage();
}
try{
//rs.beforeFirst();
while(rs.next()) {
out.println(rs.getString("DeptName"));
%><option value=<%=rs.getString("DeptName")%></option><BR><%
}
} catch (Exception e) {
msg = e.getMessage();
out.println(msg);
}
%><% db.close();%></select></td></tr>
|||As far is I can tell from this code there is no reason for the strange
behaviour. Have you tried running it in a normal application instead of a
JSP page (I have little experience with JSPs)? Have you compared such
results with running the same query from the Query Analyzer?
Silvio Bierman
|||Hi
Yes. I have run the query (thru JDBC) on regular java compiler. I have also done it on sql analyzer. In both cases the behavior is as exepected. But in JSP, when I use MS SQL Server JDBC driver. I get this odd results.
I still fail to understand why MS JDBC driver fails to support ResultSet.beforeFirst () and ResultSet.afterLast() functions?
Suma
|||te cuento que tengo el mismo problema con ResultSet.absolute(1) methods in your JSP code, while connecting to SQL Server 2000, using MS SQLSERVER JDBC driver SP2 ?
pero se logra solucionar con el drive JnetDirect pero tienes que comprarlo yo se que esa no es la idea por favor ayudame si hallas la solucion
Gracias
************************************************** ********************
Sent via Fuzzy Software @. http://www.fuzzysoftware.com/
Comprehensive, categorised, searchable collection of links to ASP & ASP.NET resources...
|||trivadeneira@.olade.org.ec wrote:
> te cuento que tengo el mismo problema con ResultSet.absolute(1) methods in your JSP code, while connecting to SQL Server 2000, using MS SQLSERVER JDBC driver SP2 ?
> pero se logra solucionar con el drive JnetDirect pero tienes que comprarlo yo se que esa no es la idea por favor ayudame si hallas la solucion
>
> Gracias
Hola. Si un mtodo falla con el MS jdbc conductor libre,
usted debe esperar o antes de que ellos liberen a su
siguiente conductor, y esperen que sea fijado entonces,
o usted puede usar un producto comercial.
El DataDirect es el negocio que realmente hace el
JDBC conductor de MS., entonces usted debera intentar su
conductor. Esto mostrar si el siguiente conductor de
los MS ser fijado.
>
> ************************************************** ********************
> Sent via Fuzzy Software @. http://www.fuzzysoftware.com/
> Comprehensive, categorised, searchable collection of links to ASP & ASP.NET resources...
|||trivadeneira@.olade.org.ec wrote:
> te cuento que tengo el mismo problema con ResultSet.absolute(1) methods in your JSP code, while connecting to SQL Server 2000, using MS SQLSERVER JDBC driver SP2 ?
> pero se logra solucionar con el drive JnetDirect pero tienes que comprarlo yo se que esa no es la idea por favor ayudame si hallas la solucion
>
> Gracias
Hola. Si un mtodo falla con el MS jdbc conductor libre,
usted debe esperar o antes de que ellos liberen a su
siguiente conductor, y esperen que sea fijado entonces,
o usted puede usar un producto comercial.
El DataDirect es el negocio que realmente hace el
JDBC conductor de MS., entonces usted debera intentar su
conductor. Esto mostrar si el siguiente conductor de
los MS ser fijado.
>
> ************************************************** ********************
> Sent via Fuzzy Software @. http://www.fuzzysoftware.com/
> Comprehensive, categorised, searchable collection of links to ASP & ASP.NET resources...
Andy_1979 wrote: