Calling db2 stored procedures from wls 8.1 sp2

Hi,
We noticed strange behaviour when moving customers applications from wls 6.1 to 8.1 sp2. We have a use case where we call db2 stored procedure two times (same prcedure) to make inserts to a database. The first time when procedure is called, everything goes smoothly but at the second time db2 claims that statement is not prepared and gives us sql error sql0518n.
We do see this error only if we use wls prepared statement cache and without cache (size=0) everything seems to work. We also did some db2 level tracing and noticed that statement is not prepared when using wls cache and db2 cannot execute statement which is not prepared....
Why I'm asking this? because this is the first time I had disable wls cache. We have used it and even optimized software performance using prepared statement cache in several projects before this.
Procedure call is done from web container lavel and no EJBs is used. We have tested the use case using autommit option and also committed firts transaction manually and closed connection.
We are using DB2 8.2 fp7 as a database and IBM level 2 JDBC driver without XA support. Honor global transactions support is on at a datasource.
Is this normal behaviour? Db2 problem or maybe WLS problem?
Regards,
Mika

I am getting the same exception about an assertion failed at weblogic.t3.srvr.T3Srvr.checkServerLock. Any ideas?

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Calling DB2 Stored Proc from Oracle DB

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Hello Everyone .. I'm quite new with WebLogic 8.1 & WorkShop, so please bare with
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Atahualpa--
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Atahualpa wrote:
Hello Everyone .. I'm quite new with WebLogic 8.1 & WorkShop, so please bare with
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Calling a stored procedure from within a ViewObject

Is it possible to make stored procedure call from within a BC4J ViewObject? Basically something like this:
select * from table(f1(3)); where f1 is a table function. Using Oracle's pipelined table functions?
If not, is it possible to call a stored procedure from Java and have the returned results be put back into a BC4J RowSet.
In addition, is there a way to create a JDBC Resultset from a BC4J RowSet?
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Is it possible to make stored procedure call from within a BC4J ViewObject? Basically something like this:
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Yes. Using our expert-mode query feature this is possible.
is it possible to call a stored procedure from Java and have the returned results be put back into a BC4J RowSet.
Yes. See this article about basing a view object on a REF CURSOR:
http://radio.weblogs.com/0118231/2003/03/03.html
In addition, is there a way to create a JDBC Resultset from a BC4J RowSet?
No. Not directly. What's the business requirement here so I can understand better?
We need to be able to dynamically create our SQL statements (the entire SQL, not just the where clause) but are required to have these sql statements generated/executed from within a pl/sql stored procedure in the database.
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I am needing to call a stored procedure from a url string (or
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Not Found
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To call db2 stored procedure having parameters in java application

Hi,
I've created db2 stored procedure which is running perfectly on db2 server after giving a CALL to it. But when I tried to call this same stored procedure in java application, its reflecting with following error......
com.ibm.db2.jcc.b.SqlException: [jcc][10100][10910][3.50.152] java.sql.CallableStatement.executeQuery() was called but no result set was returned.
Use java.sql.CallableStatement.executeUpdate() for non-queries. ERRORCODE=-4476, SQLSTATE=null
at com.ibm.db2.jcc.b.wc.a(wc.java:55)
at com.ibm.db2.jcc.b.wc.a(wc.java:102)
at com.ibm.db2.jcc.b.tk.b(tk.java:575)
at com.ibm.db2.jcc.b.vk.yb(vk.java:136)
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at SPApplication.main(SPApplication.java:31)
Here is the code.......
import java.sql.*; public class SPApplication { public static Connection con; public static CallableStatement proc_stmt; public static ResultSet rs; /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub try { Class.forName("DB2 DRIVER CLASS"); System.out.println("Class loaded....."); con = DriverManager.getConnection("jdbc:db2://localhost:PORTNO/" +                                   " DatabaseName", "username", "password"); System.out.println("Connection established....."); proc_stmt = con.prepareCall("call procedure_name(?)"); //IN Parameter proc_stmt.setInt(1, 5); System.out.println("Called procedure....."); rs = proc_stmt.executeQuery(); /******** THIS IS LINE NO. 31 *********/ while (rs.next()) {                              // Fetching rows one by one over here } proc_stmt.close(); rs.close(); con.close(); } catch (ClassNotFoundException cnfe) { cnfe.printStackTrace(); } catch (SQLException sqle) { sqle.printStackTrace(); } finally { /* try { proc_stmt.close(); rs.close(); con.close(); } catch (SQLException sqle) { sqle.printStackTrace(); } */ } } }
Please correct me, if I am wrong at any point in my application..
I would really appreciate for resolving my problem.
Thanks,
Manasi N.

Hi jschell ,
Firstly, I tried out with execute() and getMoreResults() to check if the statement is returning result set. - Its returning "null" only.
Secondly, I tried with following one by one :
1. Find a new jdbc driver
2. Write a different stored procedure.I am using DB2 Express edition - DB2 v9.7.0.0
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From these I found the available jdbc drivers as -
i) com.ibm.db2.jcc.DB2Driver
ii) COM.ibm.db2os390.sqlj.jdbc.DB2SQLJDriver
iii) com.ibm.db2.jcc.uw.DB2StoredProcDriver
I tried out my code by using each of these drivers, but still returning result set as null.
Moreover, I changed my stored procedure which has cursor returning result set. In this case also, result set is null.
Code snippet for this SP is -
30             Class.forName("com.ibm.db2.jcc.uw.DB2StoredProcDriver");
31             System.out.println("Class loaded....");
32             con = DriverManager.getConnection
33                 ("jdbc:db2://localhost:portno/dbName", "user", "password");
34             System.out.println("Connection established....");
35
36             proc_stmt = con.prepareCall("call javaSP()");
37
38             System.out.println("Called stored procedure....");
39
40             proc_stmt.execute();
41             //proc_stmt.executeUpdate();
42             //rs = proc_stmt.getResultSet();
43
44             System.out.println("Query executed....");
45
46             if ((proc_stmt.getMoreResults() == false) &&
47                     (proc_stmt.getUpdateCount() == -1)) {
48                 System.out.println("No more result sets");
49             }o/p is (for every mentioned above jdbc driver) :-
Class loaded....
Connection established....
Called stored procedure....
Query executed....
No more result sets..
The o/p is always "No more result sets"
What else can be tried out to retrieve the result set from stored procedure from Java application? And the most important, these same stored procedures are returning result sets on db2 server after calling them.
Thank you,
Manasi.N
Edited by: Manasi.N on Apr 14, 2010 12:27 AM
Edited by: Manasi.N on Apr 14, 2010 12:28 AM

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The error message is:
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A few comments...
1) Creating tables, particularly tables whose names seem to imply that they are temporary tables, on the fly in a stored procedure is a bad idea. That is not the way to work with Oracle, though it is a common practice in other databases like SQL Server. There is undoubtedly a better way to do this in Oracle if you can explain what you're trying to accomplish from a business standpoint.
2) If you are going to use dynamic SQL, you almost always want to use bind variables, not literals. One of the quickest ways to kill an Oracle database's performance is to not use bind variables.
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Justin

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