The reserved prefix that exhibits this behaviour is sp_
. Not sp
.
A stored procedure called spAddUser
will be resolved in the normal way without looking for a matching object in master
.
The relevant quote in books online is
Avoid the use of the
sp_
prefix when naming procedures. This prefix is
used by SQL Server to designate system procedures. Using the prefix
can cause application code to break if there is a system procedure
with the same name.
But I would avoid these prefixes anyway. If all the stored procedures are prefixed sp
it quickly gets annoying IMO.