Re: MS SQL Server, JDBC, and Unicode?

From:
Tom Anderson <twic@urchin.earth.li>
Newsgroups:
comp.lang.java.programmer,comp.databases.ms-sqlserver
Date:
Sat, 11 Jul 2009 12:37:11 +0100
Message-ID:
<alpine.DEB.1.10.0907111232530.30152@urchin.earth.li>
On Fri, 10 Jul 2009, Arne Vajh?j wrote:

Tom Anderson wrote:

Has anyone made SQL Server work with unicode in java?


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):

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();
   }
}


Silly question, but those ?s were unicode characters before you pasted
this into usenet, right?

Thanks for doing this, Arne - i should probably have tried it myself. It
eliminates one area of doubt about the problem, but still leaves me none
the wiser as to why the system won't do unicode right. Maybe it's
constructing SQL strings internally, rather than using PreparedStatements,
and not using the N'?' syntax. I really don't think that's the case,
though - i've seen evidence from debugging and stack traces that
PreparedStatements are indeed used.

tom

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