16.5Refreshing Logical Models with Physical Schema Changes
VEA’s “Refresh” feature allows modelers to capture changes that were made at the
physical database level and automatically incorporate them into the model. You will
find it more effective to change a physical schema by first changing the logical model
and then propagating the change to the physical schema. As it is, people in even the
most disciplined environments make physical schema changes that bypass the data
model.
To show the refresh feature in action, we must first introduce some changes into the
physical schema of which the logical model is unaware. Let’s simulate a situation
where somebody ...
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