performance when inserting into child tables

From: <ryan.gaffuri_at_cox.net>
Date: Wed, 21 Apr 2004 12:49:24 -0400
Message-Id: <20040421164926.ZTE5659.lakermmtao09.cox.net@smtp.central.cox.net>

I have a child table with a formal foreign key relationship to its parent. I have noticed that in alot of cases inserting into them is much slower than inserting into the parent.

I didn't design the system, but all of these cases do not have the foreign key indexed. I think that is the problem, but I'm not sure why. If it needs to scan the parent table to see if a value exists it can do an index scan on the primary key?

Anyone know more about this?

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Received on Wed Apr 21 2004 - 11:46:03 CDT