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Using a SP in a DB2 Function
Posted on 2012-12-24
Hi,
I have a stored procedure SP1 which returns the following result set.
ID1 CL_ID Link_ID1
123 ABC 234
333 DEF --
444 HIJ 567
Now, i want to create a UDF with V_ID as a parameter.
This will call this stored Procedure SP1 and pass the V_ID parameter against the result set, to filter for the Link_ID1.
So, if i pass the V_ID as 444 inside the UDF, then it should check for the Link_ID1 in the stored procedure. Since there is no match, it should return 444.
IF i pass 234 in the UDF, then it should look for the match of 234 and return ID1, which is 123.
Is there a way i can do it? Please advise.
I have a stored procedure SP1 which returns the following result set.
ID1 CL_ID Link_ID1
123 ABC 234
333 DEF --
444 HIJ 567
Now, i want to create a UDF with V_ID as a parameter.
This will call this stored Procedure SP1 and pass the V_ID parameter against the result set, to filter for the Link_ID1.
So, if i pass the V_ID as 444 inside the UDF, then it should check for the Link_ID1 in the stored procedure. Since there is no match, it should return 444.
IF i pass 234 in the UDF, then it should look for the match of 234 and return ID1, which is 123.
Is there a way i can do it? Please advise.
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9 Comments
Active today
Hi pvsbandi,
In DB2, a stored procedure can call a UDF (or anything else), but a UDF cannot call a stored procedure.
Can you create another stored procedure that calls the one that you have now?
Kent
In DB2, a stored procedure can call a UDF (or anything else), but a UDF cannot call a stored procedure.
Can you create another stored procedure that calls the one that you have now?
Kent
Active 4 days ago
Sure.. how? Please advise.
I want to be able to use the function in the select statements to return the ID1 or the passed V_ID from the function.
I want to be able to use the function in the select statements to return the ID1 or the passed V_ID from the function.
can you post your stored procedure code? (the one that generates that table)
maybe you can use only a function to get it all done, maybe a view will be enough
maybe you can use only a function to get it all done, maybe a view will be enough
> a UDF cannot call a stored procedure
This depends on the DB2 platform and version, I believe. It's possible in DB2 LUW since version 8.2 if I'm not mistaken.
There are certain limitations, of course. Particularly, you cannot readily process cursors in SQL UDFs.
This depends on the DB2 platform and version, I believe. It's possible in DB2 LUW since version 8.2 if I'm not mistaken.
There are certain limitations, of course. Particularly, you cannot readily process cursors in SQL UDFs.
Like I said, you won't be able to process a cursor in the UDF, so the only way to alter your SP is to remove the OPEN statement, which is probably not what you want.
Can you explain in simple terms what you're trying to achieve in your stored procedure?
Can you explain in simple terms what you're trying to achieve in your stored procedure?
Active 3 days ago
A call to a procedure should be okay in reasonably recent releases, though the procs shouldn't include statements such as CONNECT, COMMIT, etc. I'm not sure if DB2 9.7 provides a way to handle it. Cursors have been possible with DB2 for AS/400s for a number of years, but I've only seen them defined within the functions themselves.
If a cursor cannot be declared in a function for a stored proc result set, maybe a second proc can do it. The function might then be a wrapper for proc2. Maybe.
Tom
If a cursor cannot be declared in a function for a stored proc result set, maybe a second proc can do it. The function might then be a wrapper for proc2. Maybe.
Tom
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