SQL Server : Select Local Variable After Some Process - sql-server

Question

CREATE PROCEDURE dbo.test2
AS
BEGIN
DECLARE #status as int
DECLARE #error as int
SET #status = 1
SET #Error = ##ERROR
UPDATE dbo.BView
SET bview='dar'
WHERE pt='foo'
IF #Error > 0
print 'ERROR'
else
SELECT #status as 'status'
END;
Why does this query always return the default value of the local variable #status regardless of what was assigned to it?
status
------
0
Server version: MS SQL Server 2014 Express

Answer 1

In sql server 2005 : Run this in your sql server.
You cannot assign a default value at declaration.
and post the result in command.
DECLARE #status int
SET #status = 1
SELECT #status as 'status'

Answer 2

Suggestions. Although can't find some thing amiss, why not do it the normal way.
Always Declare a variable first before your update,insert or any action.
CREATE PROCEDURE dbo.sp_test2
AS
BEGIN
DECLARE #status as int
SET #status = 1
UPDATE dbo.BView
SET bview='dar'
WHERE pt='foo'
SELECT #status as 'status'
END
Second Always use the keyword AS then variable type , the followed by the size. If you dont follow by the variable size, it mostly return 0, note nvarchar types/varchar types mostly. Example
DECLARE #status as nvarchar
Often return 0 when use against a string of length 20 . Where as ,
Declare #status as nvacrhar(20)
Works fine.
There might exist an error in your update/Insert etc processes and i can see u put the declaration and the select process in the same node(i.e begin and end). You can check for an error like.
CREATE PROCEDURE dbo.sp_test2
AS
BEGIN
DECLARE #status as int
DECLARE #error as int
SET #status = 1
SET #Error = ##ERROR
--Some statement, update or insert, let's say:
UPDATE dbo.BView
SET bview='dar'
WHERE pt='foo'
IF #Error > 0
print 'ERROR'
else
SELECT #status as 'status'
END
These are suggestions though, I often do this way and it never fails me. FOr better understanding of variable in SQL Here and . Raising Errors in MSSql here and many more. Hope it helps.