Stored Procedure Parameters - Setting a default value

Question

Using SQL 2005, 2008, 2012
This should be easy, but think that I am making it hard. Below is the stored procedure that I want to call. If I want to pass a 'N' to @SearchDBsFlag how can I retain the default values for @DBName and @PreviewTextSize? I do not want to explicitly pass the
NULL, 100. I want it to pick up the default values that are defined in the stored procedure.
Create Procedure [dbo].[ifs_util_Find]
@SearchText varchar(8000)
, @DBName sysname = Null
, @PreviewTextSize int = 100
, @SearchDBsFlag char(1) = 'Y'
, @SearchJobsFlag char(1) = 'Y'
, @SearchSSISFlag char(1) = 'Y'

Answer 1

I did look up "flag coupling" and all I found was posts from you.
Start with http://en.wikipedia.org/wiki/Coupling_(computer_programming). The terminology varies; what I call "flag coupling" is one version of Content
coupling. 
Cohesion:
This is how well a module does one and only one thing; that it is logically coherent. The modules should have strong cohesion. You ought to name the module in the format "<verb><object>", where the "<object>" is a specific logical unit in
the data model. There are several types of cohesion. We rank them going from the worst form of cohesion to the best
1) Coincidental 
2) Logical
3) Temporal
4) Procedural
5) Communicational
6) Informational 
7) Functional 
Coupling:
If modules have to be used in a certain order, then they are strongly coupled. If they can be executed independently of each other and put together like Lego blocks, then they are loosely or weakly coupled. There are several kinds of coupling, which are ranked
from worse to best: 
1) Content 
2) Common 
3) Control 
4) Stamp 
5) Data 
This is covered briefly in a chapter on writing stored procedures in my book on SQL PROGRAMMING STYLE. In the meantime, you can read DeMarco, Yourdon, Constantine, Myers or several other of the pioneers. 
This is FAR more basic than SQL programming. This is what you are supposed to know before you write any code in any language. 
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