Hi everybody,

I am contemplating on a better way to implement the following.

I have a wide table called max4sale which has type and department, category, item, lesson_cat, etc. columns. They are populated depending on the type. The structure of this table is pre-defined and we're not going to change it (just to avoid discussion about the table's design).

In VFP I have the following code to check for possible conflicts when a row is inserted / updated in that table:

wait window "Checking for time conflicts..." nowait noclear
		text TO lcSQL TEXTMERGE noshow
        select COUNT(ID) as conflicts
        from dbo.max4sale where type = <<VFP2SQL(type)>>
        and <<thisform.cWhere>>
        AND Start_Time >= <<VFP2SQL(Start_Time)>>
	    and Start_time <= <<VFP2SQL(End_Time)>>
	    and ID <> <<VFP2SQL(Id)>>
		ENDTEXT

		*    _cliptext = m.lcSQL

		mysqlexec(m.lcSQL, 'csrTemp', program())

where thisform.cWhere was constructed in form's Init depending on the type.

So, I'm thinking of somehow re-producing that either as LINQ query or as a stored procedure where I'd pass many parameters and use dynamic SQL to construct the query.

Assuming I am going to try the first approach of the LINQ query, how can I do that type based condition dynamically, e.g.

if type = 1, then I want to check department column, for example. If type = 2, then department and category, etc.


Thanks in advance.