| J. Ullman: Principles of Database and Knowledge Base Systems Vol. I (3rd edition). IEEE Computer Science Press, Rockville (Md.), 1988. |
....To determine in the poststate # of a transaction which operation 3 In the following we utilize the term join tuple and substitution # for p 1 (#x p1 )#. #p n (#x pn ) synonymously. 5 instances o # # T (having a certain pattern #) are (possible) reasons for a violation of C, the semijoin [Ull88] # # C : # # # viol C (2) determines a subset # # C of tuples from the delta relation # # which are involved in violations of # viol C . We assume that for # = U p only the attribute values corresponding to new attribute values appear in # # C , i.e. # Up C : # x 1 , x n (# Up ....
J. Ullman: Principles of Database and Knowledge Base Systems Vol. I (3rd edition). IEEE Computer Science Press, Rockville (Md.), 1988.
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