Combining constraints and data-flow in a visual query language

Author

Chavda, Manoj ; Wood, Peter T.

Author_Institution

Dept. of Comput. Sci., Cape Town Univ., Rondebosch, South Africa

fYear

1997

fDate

23-26 Sep 1997

Firstpage

125

Lastpage

126

Abstract

We define a graph based visual query language for object databases, called QUIVER. Most graph based query languages proposed in the literature view queries either as constraint (pattern) graphs or as data flow graphs. QUIVER, however allows constraints and data flow to be combined in queries. This combination of constraints and data flow is motivated by the need to support comprehensive object models, such as that proposed by the Object Data Management Group (ODMG). QUIVER supports all ODMG object model constructs, including computational constructs such as operations (methods). In addition, QUIVER supports computational query constructs such as subqueries and (aggregate) functions

Keywords

data flow graphs; object-oriented databases; query languages; query processing; visual languages; ODMG object model constructs; Object Data Management Group; QUIVER; aggregate functions; comprehensive object models; computational query constructs; constraint graphs; data flow graphs; graph based visual query language; object databases; subqueries; Africa; Aggregates; Cities and towns; Computational modeling; Computer science; Data flow computing; Database languages; Joining processes; Visual databases; Visualization;

fLanguage

English

Publisher

ieee

Conference_Titel

Visual Languages, 1997. Proceedings. 1997 IEEE Symposium on

Conference_Location

Isle of Capri

ISSN

1049-2615

Print_ISBN

0-8186-8144-6

Type

conf

DOI

10.1109/VL.1997.626568

Filename

626568