
consistent with the changed record size.
1
As it is, the only program amendments
required are to the Re-order-report and the Product-changes programs (examples of
productive maintenance). None of the other programs need to be amended, because the
database management system will translate between the new stored database format
and the unchanged views required by these programs. Of course it will be necessary to
inform the database management system of (a) the change in the stored database
format, (b) the new view required by the Re-order-report program, and (c) the new view
required by the Product-changes program. Figure 1.4 shows the final situation. ...