MSSQL datatypes that return NullPointerException

Question

Using XSQLServlet with BEA Systems type 4 jDriver for SQL Server 7.0 Version: 5.1.0, I get the following error:
oracle.xml.sql.OracleXMLSQLException: java.lang.NullPointerException
while trying to access the following MSSQL Server datatypes which have non null values:
1. binary
2. image
3. sql_variant
4. timestamp
5. uniqueidentifier
6. varbinary
The problem is NOT with the jDriver for SQL Server because I've built a class that returns non null data for all datatypes. The problem must lie with XSQL Servlet.
To test, I use the following:
xsql file:
<xsql:query null-indicator="yes"
connection="{@connection}"
max-rows="{@max-rows}"
xmlns:xsql="urn:oracle-xsql"> {@sql}
</xsql:query>
url:
http://aetius/xsql/demo/query.xsql?connection=bea&sql=select+a,c,d,e+from+TYPES
I'll delete column names, eg column b which is a binary data type, from the above URL to eliminate the java.lang.NullPointerException error.
I've created the TYPES table to contain every MSSQL datatype.
CREATE TABLE [dbo].[TYPES] (
[a] [bigint] NULL ,
[binary] (10) NULL ,
[c] [bit] NULL ,
[d] [char] (10) NULL ,
[e] [datetime] NULL ,
[f] [decimal](18, 0) NULL ,
[g] [float] NULL ,
[h] [image] NULL ,
[int] NULL ,
[j] [money] NULL ,
[k] [nchar] (10) NULL ,
[l] [ntext] NULL ,
[m] [numeric](18, 0) NULL ,
[n] [nvarchar] (10) NULL ,
[o] [real] NULL ,
[p] [smalldatetime] NULL ,
[q] [smallint] NULL ,
[r] [smallmoney] NULL ,
[s] [sql_variant] NULL ,
[t] [text] NULL ,
[timestamp] NULL ,
[v] [tinyint] NULL ,
[w] [uniqueidentifier] NULL ,
[x] [varbinary] (50) NULL ,
[y] [varchar] (50) NULL
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
BTW the MSSQL Server datatypes that DO work with XSQL Servlet:
1. bigint
2. bit
3. char
4. datetime
5. decimal
6. float
7. int
8. money
9. nchar
10. ntext
11. numeric
12. varchar
13. real
14. smalldatetime
15. smallint
16. smallmoney
17. text
18. tinyint
19. varchar
Steve.

Answer 1

Thanks for the quick response.
The problem does NOT seem to be in the XML SQL Utility. In other words using an instance of OracleXMLQuery in my data type test Java program, I have a successful output including the data types in question.
Here is the Java program:
package examples.jdbc.mssqlserver4;
import java.io.*;
import java.sql.*;
import java.util.Properties;
import oracle.xml.sql.query.OracleXMLQuery;
public class Steve
public static void main(String [] args)
Properties props = new Properties();
props.put("user", "lemkau");
props.put("password", "lemkau");
props.put("server", "Northwind@Aetius:1433");
Driver myDriver = null;
try
String driverName = "weblogic.jdbc.mssqlserver4.Driver";
String url = "jdbc:weblogic:mssqlserver4";
// String driverName = "com.inet.tds.TdsDriver";
// String url = "jdbc:inetdae7:aetius:1433";
myDriver = (Driver) Class.forName(driverName).newInstance();
Connection conn = myDriver.connect(url, props);
try
Statement stmt = conn.createStatement();
stmt.execute("select * from TYPES");
ResultSet rs = stmt.getResultSet();
if(rs!=null)
OracleXMLQuery qry = new OracleXMLQuery(conn, rs);
String xmlString = qry.getXMLString();
System.out.println(" OUPUT IS:\n"+xmlString);
while (rs.next()) {
System.out.println("bigint" + " - " + rs.getString("a"));
System.out.println("binary" + " - " + rs.getString("b"));
System.out.println("bit" + " - " + rs.getString("c"));
System.out.println("char" + " - " + rs.getString("d"));
System.out.println("datetime" + " - " + rs.getString("e"));
System.out.println("decimal" + " - " + rs.getString("f"));
System.out.println("float" + " - " + rs.getString("g"));
System.out.println("image" + " - " + rs.getString("h"));
System.out.println("int" + " - " + rs.getString("i"));
System.out.println("money" + " - " + rs.getString("j"));
System.out.println("nchar" + " - " + rs.getString("k"));
System.out.println("ntext" + " - " + rs.getString("l"));
System.out.println("numeric" + " - " + rs.getString("m"));
System.out.println("nvarchar" + " - " + rs.getString("n"));
System.out.println("real" + " - " + rs.getString("o"));
System.out.println("smalldatetime" + " - " + rs.getString("p"));
System.out.println("smallint" + " - " + rs.getString("q"));
System.out.println("smallmoney" + " - " + rs.getString("r"));
System.out.println("sql_variant" + " - " + rs.getString("s"));
System.out.println("text" + " - " + rs.getString("t"));
System.out.println("timestamp" + " - " + rs.getString("u"));
System.out.println("tinyint" + " - " + rs.getString("v"));
System.out.println("uniqueidentifier" + " - " + rs.getString("w"));
System.out.println("varbinary" + " - " + rs.getString("x"));
System.out.println("varchar" + " - " + rs.getString("y"));
ResultSetMetaData md = rs.getMetaData();
// System.out.println("Number of columns: " + md.getColumnCount());
for (int i = 1; i <= md.getColumnCount(); i++) {
String name = md.getColumnName(i);
// System.out.println("Column Name: " + name);
// System.out.println("Column Length: " + md.getColumnDisplaySize(i));
stmt.close();
conn.close();
catch(SQLException se)
System.out.println("An exception was raised " + se);
catch(Exception e)
System.out.println("An exception was raised " + e);
Here is the result:
"C:\Program Files\Oracle\JDeveloper 3.1.1.2\java1.2\jre\bin\java" -XXdebug -mx50m -classpath "C:\Program Files\Oracle\JDeveloper 3.1.1.2\myclasses;C:\Program Files\Oracle\JDeveloper 3.1.1.2\lib\jdev-rt.zip;C:\Program Files\Oracle\JDeveloper 3.1.1.2\lib\connectionmanager.zip;C:\weblogic\mssqlserver4v70\classes;C:\weblogic\mssqlserver4v70\license;C:\xsql\lib\Sprinta2000.jar;C:\xsql\lib\oraclexsql.jar;C:\xsql\lib;C:\xsql \lib\xsu12.jar;C:\xsql\lib\oraclexmlsql.jar;C:\xsql\lib\classes12.zip;C:\xsql\lib\xmlparserv2.jar;C:\Program Files\Oracle\JDeveloper 3.1.1.2\java1.2\jre\lib\rt.jar" examples.jdbc.mssqlserver4.Steve
System Output: OUPUT IS:
System Output: <?xml versi on = '1.0'?>
System Output: <ROWSET>
System Output: <ROW num="1">
System Output: <a>1234567890</a>
System Output: <b>0904D000340000000000</b>
System Output: <c>true</c>
System Output: <d>abc </d>
System Output: <e>2000-10-25 09:41:20.34</e>
System Output: <f>9</f>
System Output: <g>9.2</g>
System Output: <h>0904D000340000000000</h>
System Output: <i>9</i>
System Output: <j>18.50000000</j>
System Output: <k>ALFKI </k>
System Output: <l>Soft drinks, coffees, teas, beers, and ales</l>
System Output: <m>9</m>
System Output: <n>hello</n>
System Output: <o>9.199999809265137</o>
System Output: <p>2000-10-25 09:41:00.0</p>
System Output: <q>9</q>
System Output: <r>9.20000000</r>
System Output: <t>Soft drinks, coffees, teas, beers, and ales</t>
System Output: <u>00000000000002B1</u>
System Output: <v>1</v>
System Output: <w>1AFFD361F32ED04996AA62054E954531</w>
System Output: <x>0904D000340000000000</x>
System Output: <y>abc</y>
System Output: </ROW>
System Output: </ROWSET>
System Output:
All previously questionable data types listed below using an URL in a browser are now OK using OracleXMLQuery in a Java program.
data type column name
1. binary b
2. image h
3. sql_variant s
4. timestamp u
5. uniqueidentifier w
6. varbinary x
Does this help pinpoint the problem?
null