A denotational semantics for continuous queries over streams and relations
Arvind Arasu, Jennifer Widom · ACM SIGMOD Record · 2004
Continuous queries over data streams are an important new class of queries motivated by a number of applications [BBD+02, Geh03, GO03], and several languages for continuous queries have been proposed recently [ABW03, CC+02, CC+03, WZL03]. To date the semantics of these languages have been specified fairly informally, sometimes solely through illustrative examples.