Question

T- SQL Check for String.Empty or Nulls in a Passed Parameter

Asked by: msyed1

I have a stored procedure that receives 20 different parameters as fully built Insert queries...The potential exists though that some of those parameters may be passed to the stored-procedure as empty or nulls.  I need to check to make sure that it is not empty or nulls before I actually EXEC the @SQL.  Can someone please let me know how to do that.  A small portion of the Stored Procedure code is attached.  I have arrows pointing to where I need to check the parameter.  Please show me the right way of doing that.   Help!  msyed1.

 

CREATE PROCEDURE dbo.USP_InsertNewConnectionTables
@CONNInsertSQL varchar(6000) 
 
 
AS
 
BEGIN TRANSACTION
Set Nocount On
Declare @SQL varchar (6000)
 
 
Select @SQL = @CONNInsertSQL
If @SQL <>     String.Empty or NULLS     <<<===================
Begin
  EXEC(@SQL)
  IF @@ERROR <> 0
   BEGIN
    ROLLBACK TRANSACTION
    RETURN (214)
   END
END
 
 
 
COMMIT TRANSACTION
Return 55
GO

                                  
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Asked On
2007-11-29 at 10:59:58ID22991414
Tags

check

,

empty

,

sql

,

null

Topics

Databases Miscellaneous

,

MS SQL Server

Participating Experts
2
Points
250
Comments
4

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Answers

 

by: danrosenthalPosted on 2007-11-29 at 11:04:50ID: 20376279

How about:
If @SQL IS NOT NULL

 

by: imitchiePosted on 2007-11-29 at 11:08:41ID: 20376311

check for both '' and NULL

If ISNULL(@SQL, '') <> ''

 

by: msyed1Posted on 2007-11-29 at 11:11:23ID: 20376341

imitchie: will this check for both NULLS and an empty string.  I need to check for both....

 

by: danrosenthalPosted on 2007-11-29 at 11:30:35ID: 20376485

Either of these should work:

If @SQL IS NOT NULL OR @SQL <> ''

If ISNULL(@SQL, '') <> ''

20120131-EE-VQP-002

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