RE: SQL Functions

>Select
>            ItemDescription(ITEM#) as "Item Description",
>ItemQOH(ITEM#) as "Quantity on Hand",
>Item12MonthUsage(ITEM#) as "Average Yearly Usage"
>From
>            SomeListOfItems

>Does each one of these functions need to retrieve this information from
>ITEMMSTR or does the record somehow stay resident in memory from one
>function request to the next.   
I'm pretty sure input record is the same for all three UDF invocations.

>So when I roll this out to 500 users is
>the system going to get slammed?
It depends on how complex your functions are.  
Rule of thumb I use with my UDFs is to make them as simple as possible
(single purpose functions).  
If your UDFs are rather simple (i.e. add these two numbers and return the
sum, convert decimal to date), there shouldn't be much overhead.  
If each function runs another SQL statement in turn and the FROM file has
lots of records, I can see lots of 'slamming' going on.

Test in on a large file.

Elvis