Re: MS SQL Server, JDBC, and Unicode?

From:
=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>
Newsgroups:
comp.lang.java.programmer,comp.databases.ms-sqlserver
Date:
Fri, 10 Jul 2009 20:36:47 -0400
Message-ID:
<4a57de93$0$48237$14726298@news.sunsite.dk>
Tom Anderson wrote:

Has anyone made SQL Server work with unicode in java?

I'm working on a system which wants to put unicode in a database. It
does this fine with Oracle, but we haven't been able to make it do so
when the database is SQL Server - and indeed the manufacturers of the
system list this as something that it won't do. Anything that isn't on
the current code page turns into a question mark.

Our columns are nvarchar, and sendStringParametersAsUnicode is true in
the JDBC URL. Is there more than this we need to do?

I've come across mention of a syntax which looks like N'this is a
unicode string' for writing unicode literals in SQL. Do i need to do
that? How do i do that if i'm using PreparedStatements?

We're using the MS driver. An alternative would be the open source jTDS
- any idea if that will fix the problem?


I can't get it not to work.

:-)

The following is tested with the MS driver (driver for 2000
against 2000, but I expect 2005 against 2005 to work identical):

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;

public class Unicode {
     public static void main(String[] args) throws Exception {
         Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
// SQLServer 2000
         Connection con =
DriverManager.getConnection("jdbc:microsoft:sqlserver://localhost;DatabaseName=Test",
"sa", "");
         Statement stmt = con.createStatement();
         stmt.executeUpdate("CREATE TABLE unifun (id INTEGER NOT NULL,
data NVARCHAR(50), PRIMARY KEY(id))");
         stmt.executeUpdate("INSERT INTO unifun VALUES(1,N'?????? the
wrong way')");
         PreparedStatement pstmt = con.prepareStatement("INSERT INTO
unifun VALUES(?,?)");
         pstmt.setInt(1, 2);
         pstmt.setString(2, "?????? the correct way");
         pstmt.executeUpdate();
         ResultSet rs = stmt.executeQuery("SELECT id,data FROM unifun");
         while(rs.next()) {
             System.out.println(rs.getInt(1) + " : " + rs.getString(2));
         }
         rs.close();
         stmt.executeUpdate("DROP TABLE unifun");
         stmt.close();
         con.close();
     }
}

Arne

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