Unable to fetch columns; Invalid state/No Suitable Driver

Question

Hi!
I'm trying to populate a combo box with data from a MySQL database (or any other database for that matter), I create a JDBC connection source, and set the following:
URL = jdbc:mysql://localhost:3306/test
Driver = org.mysql.jdbc.Driver (i have also tried org.gjt.mm.mysql.Driver)
Username = anonymous
Password = <blank>
Next I create a NBJdbcRowSet and set:
Command = SELECT * FROM foo
Connection Provider = connectionSource1 (the above connection source)
Now if I click the elipses next to Default Column Values, I get the message 'Unable to fetch columns; Invalid State'
If I replace the NBJDBCRowSet with a NBCachedRowSet, the error becomes 'Unable to fetch columns; No Suitable Driver'.
The database is browseable in the runtime tab, and the table exists (I can run SQL queries and get the expected results). The anonymous account exists and has access to the tables in question (the same setup is used in a few different applications, all of which work fine). Using the root account gives the same results. Using the PointBase example database gives the same results:
Driver: com.pointbase.jdbc.jdbcUniversalDriver
URL: jdbc:pointbase:server://localhost:9092/sample
Details of setup:
OS: Windows XP Pro SP2
IDE: Sun Java Studio Enterprise 7 2004Q4
Java version in use: 1.4.2_05 (as packaged with the studio)
MySQL: v5.0.7-beta-nt
Connector: MySQL Connector/J 3.0.17-ga
PointBase: As came with Studio Enterprise
I should mention that I can get DB connectivity in my app, I can create a comboBox and set the model to 'nBCachedRowSet1: name' and the contents of that field appears in my comboBox, however I need to create about a dozen tables and I don't relish the thought of manually creating models for each one ;)
Any suggestions are appreciated!
Cheers!
Darren

Answer 1

Hi Thanks for your reply.
I've retried with PointBase and the Sample DB:
* New project. New JFrame.
* Create ConnectionSource, NBJdbcRowSet, ComboBox
* Config ConnectionSource:
- Driver: com.pointbase.jdbc.jdbcUniversalDriver
- URL: jdbc:pointbase:server://localhost:9092/sample
- Username/pass: as per PointBase setup
* Config NBJdbcRowSet
- ConnectionProvider: connectionSource1
- Command: SELECT * FROM CUSTOMERINFO
- Default Column Values: <open GUI>, <Fetch Columns>, "Unable to fetch columns; Invalid State"
So this is where I get the problem, I'm not sure if i've buggered it up though, so I continue to see if I can get data:
- Add Column: NAME
- OK, Close
* Config ComboBox
- Open Model dialog
- Select Mode: ComboBoxEditor
- RowSet: nBJdbcRowSet1 (this throws the error again)
- Column: NAME (entered manually, dropdown is empty)
- OK, Close
* Run app
Errors!
Seems like the GUI builder did something wrong - it generated a bunch of functions for each thing i added, like this:
public void setJComboBox1(JComboBox val) {
this.jComboBox1 = val;
and the project won't compile. I figure out it should be like this:
public void setJComboBox1(javax.swing.JComboBox val) {
this.jComboBox1 = val;
but the functions aren't doing anything anyway, so I delete them all. I'm starting to think my installation is borked.
Project now compiles and runs, but there's no data, and I get:
ClassNotFoundException: com.pointbase.jdbc.jdbcUniversalDriver
At this point i should probably find the jar with that driver in it and mount this/add it to the classpath, but the boss has decided we'll use Borland Delphi 2005 .NET anyways, so I won't take this any further...
Thanks for your help guys!
Darren