Dovetail SchemaEditor vs. ddcomp – or – why is ddcomp so slow?
May 2, 2011
While doing some prep for my upcoming webinar on Clarify/Dovetail Schema 101, I started doing some closer looking into what SchemaEditor and ddcomp actually do under the hood. We’ve had some good reports from customers on how much faster schema changes get applied when using Dovetail SchemaEditor. I knew it as well, but I didn’t really know why. So I put on my Encyclopedia Brown hat and started my investigation. The scenario My test case was pretty simple: add a new column to the case table. A pretty common scenario. Dovetail SchemaEditor I ran SchemaEditor, adding a new x_test_integer column. I examined the logs emitted by SchemaEditor, as well as the SQL Profiler trace. Here are the changes SchemaEditor made to the database: 1. Add the new column to the metadata (adp_sch_info table) INSERT INTO adp_sch_info (…) VALUES…