David A. Selby
IBM J. Res. Dev
In database systems, users access shared data under the assumption that the data satisfies certain consistency constraints. This paper defines the concepts of transaction, consistency and schedule and shows that consistency requires that a transaction cannot request new locks after releasing a lock. Then it is argued that a transaction needs to lock a logical rather than a physical subset of the database. These subsets may be specified by predicates. An implementation of predicate locks which satisfies the consistency condition is suggested. © 1976, ACM. All rights reserved.
David A. Selby
IBM J. Res. Dev
Inbal Ronen, Elad Shahar, et al.
SIGIR 2009
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IEEE Communications Magazine
Elliot Linzer, M. Vetterli
Computing