To call db2 stored procedure having parameters in java application

Question

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)
at com.ibm.db2.jcc.b.vk.executeQuery(vk.java:114)
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.

Answer 1

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
I have the required jar files - i)db2jcc.jar ii) db2jcc_license_cu.jar
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