186
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VLDB
15 years 7 months ago
1991 ACM 
Multi-level transactions are a variant of open nested transactions in which the subtransactions correspond to operations at different levels of a layered system architecture. The ...
164
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VLDB
15 years 7 months ago
1991 ACM 
Systems designed for efficient retrieval of conventional data can be very inefficient at retrieving documents. Documents have more complex structure than conventional data, and th...
160
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VLDB
15 years 7 months ago
1991 ACM 
It is widely recognized that production rules in database systems can be used to automatically maintain derived data such as views. However, writing a correct set of rules for e ci...
159
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VLDB
15 years 7 months ago
1991 ACM
Recent work on parallel joins and data skew has concentrated on algorithm design without considering the causes and chara.cteristics of data. skew itself. Existming ana.lyt,ic mod...
155
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VLDB
15 years 7 months ago
1991 ACM 
We propose a new method for integrity checking in deductive databases.The methodaugmentsadatabasewith asetof transition and internal eventsrules,which explicitly definetheinsertio...
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