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ACM Transactions on Database Systems (TODS), Volume 24 Issue 3, Sept. 1999

Type-checking OQL queries in the ODMG type systems
Suad Alagíc
Pages: 319-360
DOI: 10.1145/328939.328943
Several negative results are proved about the ability to type-check queries in the only existing proposed standard for object-oriented databases. The first of these negative results is that it is not possible to type-check OQL queries in the...

Indexing large metric spaces for similarity search queries
Tolga Bozkaya, Meral Ozsoyoglu
Pages: 361-404
DOI: 10.1145/328939.328959
One of the common queries in many database applications is finding approximate matches to a given query item from a collection of data items. For example, given an image database, one may want to retrieve all images that are similar to a given...

Specification and implementation of exceptions in workflow management systems
Fabio Casati, Stefano Ceri, Stefano Paraboschi, Guiseppe Pozzi
Pages: 405-451
DOI: 10.1145/328939.328996
Although workflow management systems are most applicable when an organization follows standard business processes and routines, any of these processes faces the need for handling exceptions, i.e., asynchronous and anomalous situations that fall...