By Georg Lausen, Dan Suciu
The papers during this quantity symbolize the technical software of the ninth Biennial WorkshoponDataBasesandProgrammingLanguages(DBPL2003),whichwas hung on September 6-8, 2003, in Potsdam, Germany. The workshop meets each years, and is a well-established discussion board for ideas that lie on the intersection of database and programming language study. DBPL 2003 endured the t- dition of excellence initiated through its predecessors in Rosco?, Finistre (1987), S- ishan, Oregon (1989), Nafplion, Argolida (1991), new york, big apple (1993), Gubbio, Umbria (1995), Estes Park, Colorado (1997), Kinloch Rannoch, Sc- land (1999), and Frascati, Rome (2001). Theprogramcommitteeselected14papersoutof22submissions,andinvited twocontributions.The16talkswerepresentedoverthreedays,insevensessions. In theinvitedtalk Jennifer Widom provided the paper CQL: a Language forContinuousQueriesoverStreamsandRelations,coauthoredbyArvindArasu andShivnathBabu.Whilealotofresearchhasbeendonerecentlyonqueryp- cessingoverdatastreams,CQLisvirtuallythe?rstproposalofaquerylanguage on streams that may be a strict extension of SQL. The language is established round an easy but strong suggestion: it has unique information forms, family members and streams, with well-de?ned operators for mapping among them. Window speci?cation expressions, reminiscent of sliding home windows, map streams to family members, whereas operators akin to ’’insert stream,’’ ’’delete stream,’’ and ’’relation stream’’ map kinfolk to streams through returning, at every one second in time, the newly inserted tuples, the deleted tuples, or a picture of the full relation. the various examples during this paper make a resounding case for the ability and value of CQL
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Additional resources for Database Programming Languages: 9th International Workshop, DBPL 2003, Potsdam, Germany, September 6-8, 2003, Revised Papers
Now consider what happens with each way that this pattern can be matched in the string. 1. If it is matched from the first position in the string then the pair 10 at positions [23,24] is mapped to the same positions in the string which are marked as in and all other 10 and 01 pairs are mapped to unmarked positions is matched from the third position then the pair 01 at 2. If the pattern positions [15,16] is mapped to the positions [17,18] in the string which are marked as in and all other 10 and 01 pairs are mapped to unmarked positions.
There can be multiple annotations attached to the same data element. We sometimes use the phrase “an annotation is attached to a location” to mean the same as an annotation is attached to the data element that resides in that location. If there is an annotation attached to the location (Person(112, “Joe”, 23), 3), we will write the tuple as Person(112, “Joe”, Conjunctive Query. Our results are based on conjunctive queries . A conjunctive query has the form where denote vectors of variables and every variable in occurs in for some Each is called a subgoal and each where is a relation name.
Org/TR/xpath/, Nov. 1999. * This tutorial is based on joint work with Reinhard Pichler and was partially sup- ported by the Austrian Science Fund (FWF) under project No. Z29-N04 and the GAMES Network of Excellence of the European Union. The second author’s work was sponsored by Erwin Schrödinger Grant J2169 of the FWF. com. G. Lausen and D. ): DBPL 2003, LNCS 2921, p. 20, 2004. © Springer-Verlag Berlin Heidelberg 2004 Satisfiability of XPath Expressions Jan Hidders University of Antwerp Dept. be Abstract.
Database Programming Languages: 9th International Workshop, DBPL 2003, Potsdam, Germany, September 6-8, 2003, Revised Papers by Georg Lausen, Dan Suciu