lotuscript: some questions about connecting to a SQL DB - sql

Question

I've got this code that is working... I read from an MS SQL database some rows from a table and then send an email for each row.
I'm about to add an "attachment" field, on my SQL database and I'd like to add the attachment at the end of my body.
I have two questions: 1) what datatype should I use on MS SQL? (Binary field, maybe) and 2) if someone else has some example code, I'd really appreciate it.
A bonus question: on a more advanced version of this script, i first run by all my results from my resultset to get the IDs from the messages and then update their status on the MS SQL table.
Then I try and run by the same resultset again, to actually perform the sending....
Somehow, on the second run, I'm having trouble starting from row 1, using the same code than bellow... any advice on what's the best way to do that?: My requirement is that I have to run twice by the same resultset. :)
Thanks in advance.
Option Public
Uselsx "*LSXODBC"
Sub Initialize
Dim session As New NotesSession
Dim db As NotesDatabase
Dim doc As NotesDocument
Dim subject As String, cc As String, bcc As String, sender As String, OID As String, mailto As String, bodyNotMIME As String
Dim body As NotesMIMEEntity
On Error Goto errorCounter
Set db = session.CurrentDatabase
Gosub SendMailGeneral
Exit Sub
SendMailGeneral:
Dim con As New ODBCConnection
Dim qry As New ODBCQuery
Dim result As New ODBCResultSet
Dim defaultQuery As String
Set qry.Connection = con
con.SilentMode = True
If con.ConnectTo("DSN_Name","USER_NAME", "PASSWORD") Then
Set result.Query = qry
defaultQuery = "select TOP (10) * from Message where StatusType=0"
qry.SQL = defaultQuery
result.Execute
If (result.IsResultSetAvailable) Then
Do
result.NextRow
Gosub GetRowFields
Gosub SendMail
Loop Until result.IsEndOfData
End If
End If
result.Close(DB_CLOSE)
Return
End Sub
GetRowFields:
mailto = result.GetValue("To")
cc = result.GetValue("CC")
bcc = result.GetValue("Bcc")
sender = result.GetValue("Sender")
subject = result.GetValue("Subject")
bodyNotMIME = result.GetValue("Body")
OID = result.GetValue("OID")
Return
SendMail:
Dim mail As NotesDocument
Set mail = New NotesDocument(db)
Dim stream As NotesStream
Set stream = session.CreateStream
'Recipients
mail.SendTo = mailto
mail.CopyTo = cc
mail.BlindCopyTo = bcc
' Set all sender-related fields
mail.ReplyTo = sender
mail.Principal = sender
mail.From = sender
mail.AltFrom = sender
mail.SendFrom = sender
mail.INetFrom = sender
mail.tmpDisplaySentBy = sender
mail.tmpDisplayFrom_Preview = sender
mail.DisplaySent = sender
'Body
Call stream.WriteText(bodyNotMIME)
Set body = mail.CreateMIMEEntity
Call body.SetContentFromText _
(stream, "text/html; charser=iso-8859-1", ENC_NONE)
'Subject
mail.Subject = subject
'Send
Call mail.Send(False, False)
Return

Answer 1

Wasn't this line:
result.NextRowcode
supposed to be:
result.NextRow
?
I don't know about MSSQL, but in DB2 we routinely use Blob/Clob binary data type to store any type of files.
I hear that many MSSQL experts recommend rather storing files on file system with only their path and file name in a DB.

Answer 2

OK, here's the abbreviated code from my Java ScriptLibrary that uses JDBC to connect to DB2 and execute a query (you would only need to import your db's jar-s and use com.microsoft.sqlserver.jdbc.SQLServerDriver for MS SQL):
import java.sql.*;
import com.ibm.db2.jcc.DB2Driver;
public class DB2Connection {
protected String server;
protected String port;
protected String dbName;
protected String userdb2;
protected String pwddb2;
protected java.sql.Connection con;
public DB2Connection( String srv, String port, String db, String user, String pass ){
this.server = srv;
this.port = port;
this.dbName = db;
this.userdb2 = user;
this.pwddb2 = pass;
connectDB2();
}
public void connectDB2() {
try {
Class.forName("com.ibm.db2.jcc.DB2Driver"); // .newInstance();
String url = "jdbc:db2://" + server + ":" + port + "/" + dbName;
con = DriverManager.getConnection(url, userdb2, pwddb2);
System.out.println("Connection to DB2 succeded");
} catch (Exception e) {
System.out.println("Error connecting DB2 Server") ;
e.printStackTrace();
}
}
protected ResultSet executeQuery( String queryString ) throws SQLException, Exception {
System.out.println( "Preparing query:\t" + queryString );
ResultSet rs = null;
try {
Statement stmt = con.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
rs = stmt.executeQuery(queryString);
} catch (SQLException sqle) {
String error = ("SQLException : Could not execute query");
throw new SQLException(error);
} catch (Exception e) {
String error1 = ("Exception : An Unknown error occurred.");
throw new Exception(error1);
}
return rs;
}
protected int executeCountQuery( StringBuffer queryStr ){
System.out.println( "Preparing query:\t" + queryStr );
try {
ResultSet rs = executeQuery( queryStr.toString( ) );
rs.next(); //only one row in result set
return rs.getInt(1);
} catch (SQLException sqle) {
System.out.println("SQLException: Could not get ResultSet from DB2Connection.executeQuery");
sqle.printStackTrace();
} catch (Exception e) {
System.out.println("Exception : An Unknown error occurred while calling.");
e.printStackTrace();
}
return 0;
}
protected int executeCountQuery( PreparedStatement ps ){
//System.out.println( "Preparing prepared statement - query:\t" ); //+ ps.getQuery( ) );
try {
ResultSet rs = ps.executeQuery( );
rs.next(); //only one row in result set
return rs.getInt(1);
} catch (SQLException sqle) {
System.out.println("SQLException: Could not get ResultSet from DB2Connection.executeQuery");
sqle.printStackTrace();
} catch (Exception e) {
System.out.println("Exception : An Unknown error occurred while calling.");
e.printStackTrace();
}
return 0;
}
public Connection getConnection(){
return con;
}
}
To check out the examples of using LS2J to use Java classes directly from your LotusScript code, download this great LS2J samples database from Julian Robichaux:
http://www.nsftools.com/tips/NotesTips.htm#ls2jexamples
And here's a good link to start with, explains how to use JDBC with MS SQL server:
http://support.microsoft.com/kb/313100