How to pass values from SP to SP? - sql

Question

I have a question, I have a Stored Procedure which returns a value. This Stored Procedure is being executed within another SP and I need to transfer the value into this SP. How can I accomplish this.
Any help will be appreciated.
Thank you
Example:
CREATE PROC [dbo].[isp_CREATE_CONFIG]
#CFG_KEY VARCHAR(15)
, #CFG_SHORTVALUE INT
, #CFG_LONGVALUE VARCHAR(200)
, #CFG_DESC VARCHAR(250)
, #CFG_SHORT_DESC VARCHAR(100)
, #CFG_MISC1 VARCHAR(50)
, #CFG_MISC2 VARCHAR(50)
, #CFG_MISC3 VARCHAR(50)
, #CFG_MISC4 VARCHAR(50)
, #CFG_MISC5 VARCHAR(50)
, #CFG_USER VARCHAR(20)
, #CFG_MSG VARCHAR(250) OUTPUT
AS
DECLARE
#c_ErrMsg VARCHAR(200)
, #c_ErrNum VARCHAR(5)
, #c_Continue INT
, #c_Date VARCHAR(20)
/* Assign value to local variables */
SET #c_Date = GETDATE()
SET #c_Continue = 0
/* Run Validations */
IF EXISTS (SELECT 1 FROM CONFIG(NOLOCK) WHERE cfg_key = #CFG_KEY)
BEGIN
SET #c_ErrNum = 60001
SET #c_ErrMsg = 'Configuration Key (' + #CFG_KEY + ') already exist. Please check System Configuration. Error: ' + #c_ErrNum
SET #CFG_MSG = #c_ErrMsg
SET #c_Continue = 1
END
/* Create Configuration */
SET #CFG_MSG = ''
IF #c_Continue = 0
BEGIN
IF NOT EXISTS(SELECT 1 FROM CONFIG(NOLOCK) WHERE cfg_key = #CFG_KEY)
BEGIN
INSERT INTO CONFIG
(
cfg_key , cfg_short_value , cfg_long_value , cfg_desc ,cfg_short_desc
, cfg_misc1 , cfg_misc2 , cfg_misc3 , cfg_misc4
, cfg_misc5 , cfg_add_who , cfg_edit_date , cfg_edit_who
)
VALUES
(
#CFG_KEY , #CFG_SHORTVALUE , #CFG_LONGVALUE , #CFG_DESC , #CFG_SHORT_DESC
, #CFG_MISC1 , #CFG_MISC2 , #CFG_MISC3 , #CFG_MISC4
, #CFG_MISC5 , #CFG_USER , #c_Date , #CFG_USER
)
SET #CFG_MSG = 'Configuration has been created.'
END
END
GO

Answer 1

Your stored procedure that returns the value has a parameter declared as OUTPUT, something like this:
CREATE PROCEDURE my_returning_proc (#ret VARCHAR(10) OUTPUT) AS
BEGIN .... END
If you want to use this value you need to call the STORED PROCEDURE like this:
DECLARE #var VARCHAR(10);
EXEC my_returning_proc #var OUTPUT;
PRINT #var
The key's here is to add OUTPUT into EXEC statement
EDIT: Thanks for providing example.
For your case you would call the stored procedure like this:
DECLARE #var_returned VARCHAR(250);
EXEC [dbo].[isp_CREATE_CONFIG] 'BLAH', 0, 'BLAH', 'BLAH', 'BLAH', ......, #var_returned OUTPUT

Answer 2

By return a value, I assume you mean using return. You can also declare output parameters for the stored procedure.
Here is how:
declare #retval int;
exec #retval = <stored procedure call>
Here is a simple code sample anyone can try:
create procedure dum as return 5
declare #retval int;
exec #retval = dum
select #retval
I use this technique all the time to return status from stored procedures.