Solved

Java call DB2 Stored Procedure with OUT as ResultSet

Posted on 2014-10-14
10
307 Views
Last Modified: 2014-11-27
Dear Sir,

Here is my DB2 Stored Procedure :

CREATE PROCEDURE SP_Test3 (OUT resultset VARCHAR(2048))
begin

declare mycur cursor for

select Val_CODE, Val_DESC From CODE_TYPE ;

open mycur;
Fetch from mycur into resultset;
close mycur;

end

Open in new window



Would like to know how to define the code in Java to call above stored procedure ?
0
Comment
Question by:Chong Chee Leong
  • 4
  • 3
10 Comments
 
LVL 142

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 40381522
please refer to the documentation:
http://publib.boulder.ibm.com/infocenter/idshelp/v111/index.jsp?topic=/com.ibm.jccids.doc/com.ibm.db2.luw.apdv.java.doc/doc/tjvcscsp.htm

in your case, that should go like this:
String resultset ;
Connection con;
CallableStatement cstmt;
ResultSet rs;

cstmt = con.prepareCall("CALL SP_Test3(?)");                
cstmt.registerOutParameter (1, Types.VARCHAR);                         
cstmt.executeUpdate();     
resultset = cstmt.getString(1);
cstmt.close();               

Open in new window

0
 

Author Comment

by:Chong Chee Leong
ID: 40381619
Noted and thanks.

Actually I would to get the output return as Resultset.
But in Stored Procedure I want to close the cursor 1st with include "close mycur;" as you can see...

Is this possible doing in this way?
0
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 40382179
>Actually I would to get the output return as Resultset.
as you return only a single string values, this is not possible with the current procedure

in that case, you would want to define the parameters as cursor, and not loop/fetch the cursor (just open it) inside the procedure
0
Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

 

Author Comment

by:Chong Chee Leong
ID: 40383592
Noted.

Would like to know cursor must be remain open during in DB2 Stored Procedure?
Once it's close, it's totally can't get the ResultSet right in coding?
0
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 40396345
>Would like to know cursor must be remain open during in DB2 Stored Procedure?
yes

>Once it's close, it's totally can't get the ResultSet right in coding?
exactly

once the session that runs the procedure has finished the read (and closed the reader), the cursor is also closed automatically
0
 

Author Comment

by:Chong Chee Leong
ID: 40398402
understood and thanks
0
 
LVL 25

Expert Comment

by:Tomas Helgi Johannsson
ID: 40404201
Hi!

This is how you code SP to return a resultset.

CREATE OR REPLACE PROCEDURE SEARCH_COUNTRY (IN searchKey varchar(30))
    DYNAMIC RESULT SETS 1
    LANGUAGE SQL
    BEGIN
        DECLARE result_set_1 CURSOR WITH RETURN TO CLIENT FOR
            SELECT * FROM country WHERE country_name LIKE searchKey;   
        OPEN result_set_1;
    END;

Open in new window


The client (the caller) takes care of the closing of the resultset.
See the manual for your version of DB2 for more info.

Regards,
     Tomas Helgi
0
 

Author Comment

by:Chong Chee Leong
ID: 40406493
Thanks Tomas for the sample stored pro.
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

There is an easy way, in .NET, to centralize the treatment of all unexpected errors. First of all, instead of launching the application directly in a Form, you need first to write a Sub called Main, in a module. Then, set the Startup Object to th…
Having just graduated from college and entered the workforce, I don’t find myself always using the tools and programs I grew accustomed to over the past four years. However, there is one program I continually find myself reverting back to…R.   So …
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question