BUG: Stored Proc. Generates Erroneous 515 Errors w/ Bound Rule

• Microsoft SQL Server, version 4.2

SYMPTOMS

The following stored procedure can generate erroneous 515 errors,

   Attempt to insert the value NULL into column '%.*s',
   table '%.*s'; column does not allow nulls.  Update fails.

The table: create table rde_testtab3

   (col1   int
   ,col2   varchar(255)
   ,col3   datetime
   ,col4   bit
   ,col5   timestamp)

   (@c1   int=null
   ,@c2   varchar(255)=null
   ,@c3   datetime=null
   ,@c4   tinyint=null
   ,@wh   int)
   as
   BEGIN
      update rde_testtab3
       set col1 = ISNULL(@c1,col1)
       ,set col2 = ISNULL(@c2,col2)
       ,set col3 = ISNULL(@c3,col3)
       ,set col4 = ISNULL(@c4,col4)
       where col1 = @wh
   END

   create rule mr_NotBlank as (ltrim(rtrim(@value)) != '')

   exec testparams;1 @c3='1/5/95', @wh=20668
   exec testparams;1 @c2='A TEST THREE TIMES', @wh=20668

STATUS

Microsoft has confirmed this to be a problem in Microsoft SQL Server version 4.2. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.