JDBC Driver to Support nvarchar/nchar/ntext

Question

I downloaded the jdbcKona driver for MS SQL Server 7/2000 from
the "Download Center". This page claims that this driver
supports the international data types (nvarchar, nchar, and
ntext) on SQL Server 7/2000.
http://www.weblogic.com/docs51/techstart/install_jmsq4.html
The examples provided in this download were very old (12/19/2001)
and none of them showed anything dealing with these international
types so I wonder if this driver truly does support these data
types or if I somehow downloaded the wrong driver?
I'd be interested in seeing some examples of how to use these
international types to store various languages in the database.
Something along the lines of performing this query (but doing
so via JDBC where the text within the single quotation marks
is a parameter that could be English, French, etc.) would be
great:
select address from names where name = N'буйно'
Thanks.

Answer 1

Grace wrote:
Okay, that kind of makes sense, but are you saying that if I
have this table:
NAMES
name nvarchar(50)
address nvarchar(100)
and I have a prepared statement like this:
dbstatement = dbconnection.prepareStatement(
"insert into address values ( ?, ? )" );
that this set of JDBC:
dbstatement.setString( 1, "буйно" );
dbstatement.setString( 2, "123 позволяет"
ResultSet rs = dbStatement.executeQuery();
would work the same way as this set of JDBC:
dbstatement.setString( 1, "Alfred" );
dbstatement.setString( 2, "123 West Main Street" );
ResultSet rs = dbStatement.executeQuery();
This does not appear to be the case. When I try this, I get a
SQLException: string or binary data would be truncated. If I
modify the query so that it doesn't throw any errors I see
garbage text inserted into the database.
Are you aware of any examples of this?No JDBC driver will change or interpret the content of any string parameter values. Is
that syntax supposed to be understood by your DBMS? I think you need to create
whatever string you want to send, as a Java String with the unicode characters you want,
then set the parameter(s) with the value. Eg:
String myFirst = "\u1073\u1091\u1081\u1085\u1086"; // note Java syntax for unicode characters...
dbStatement.setString(1, myFirst );
Also, the SQL you are doing is an insert, not a query, so use executeUpdate(). ExecuteQuery()
will throw an exception.
Joe
>
>
Joseph Weinstein <[email protected]> wrote:
Grace wrote:
I downloaded the jdbcKona driver for MS SQL Server 7/2000 from
the "Download Center". This page claims that this driver
supports the international data types (nvarchar, nchar, and
ntext) on SQL Server 7/2000.
http://www.weblogic.com/docs51/techstart/install_jmsq4.html
The examples provided in this download were very old (12/19/2001)
and none of them showed anything dealing with these international
types so I wonder if this driver truly does support these data
types or if I somehow downloaded the wrong driver?
I'd be interested in seeing some examples of how to use these
international types to store various languages in the database.
Something along the lines of performing this query (but doing
so via JDBC where the text within the single quotation marks
is a parameter that could be English, French, etc.) would be
great:
select address from names where name = N'&#1073;&#1091;&#1081;&#1085;&#1086;'The driver support of nvarchar etc. means that it will transmit string
values,
such as PreparedStatement parameters, with the "N'" prefix, and all java
(16-bit) characters as unicode. This way, the DBMS will not strip the
characters
with a varchar map. The driver doe not alter the static contents of SQL
that
the application sends. It would be the DBMS that would interpret (or
not)
the SQL such as you posed above.
Joe