Ilsoo Ahn

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The need for aupporttng trme varying :njormation in databa8e8 has been recogntzed for qurte some trme Many authors have propoeed numerous scheme8 to satrujy this need by tncor-poratrng one or two trme attrrbutes in the database. Unfortunately, there has been conju-8;on concermng the terminology and definition of theae trme attribute8 Thrs paper pro-poae8 a(More)
Various types of computer systems are used behind the scenes in many parts of the telecommunications network to ensure its efficient and trouble-free operation. These systems are large, complex, and expensive real-time computer systems that are mission critical, and contains a database engine as a critical component. These systems share some of common(More)
A prototype of a temporal database management system was built by extending Ingres. It supports the temporal query language TQuel, a superset of Quel, handling four types of database static, rollback, historical and temporal. A benchmark set of queries was run to study the performance of the prototype on the four types of databases. We analyze the results(More)
  • Ilsoo Ahn
  • 1986
There are several issues to be investigated for implementation of database management systems with temporal support. Examples are the types of databases in terms of temporal support, handling of ever-growing storage size, use of optical disks, representation of temporal versions into physical storage, and efficient access methods for both temporal and(More)