How big should I allow my SP's to get?

Hi,
I've got a stored procedure which returns entries for a calendar from all over my database by looking at lots of different tables that have date fields.
The SP is basically a union of about 10 different selects from various places but I am also doing things like swapping that dates if the end date is before the start.
My question is how large should I allow my SP to get before I start shifting some of the logic back to the C# code?
Cheers,
Paul.

There is no direct answer to that question, but maybe: it is not the right question to ask.
As long as you are reading working with data from the tables you should probably be in SQL. Particularly if you do this in a set-based fashion. That is, if you need to swap start/end dates on 10000 rows, you can do this in a single statement in T-SQL. Not
in C#.
One situation where you should consider C# is when you want to complex logic on a scalar value, for instance regular-expression matching. Or administrative operations like working the surrounding file system. It may also be an option for data operations
where there is no good set-based solution in T-SQL.
But the sheer size has little do to with it.
Erland Sommarskog, SQL Server MVP, [email protected]

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