Titlebook: Database Programming Languages (DBPL-4); Proceedings of the F Catriel Beeri,Atsushi Ohori,Dennis E. Shasha Conference proceedings 1994 Spri

certitude

https://doi.org/10.1007/978-1-4684-2196-5ecidable in general. Nevertheless, simple syntactic restrictions on the calculus result in computable languages. We provide here two restricted calculi with bounded complexity, and show that the restrictions are minimal. Indeed, any looser restriction leads to non computable queries.

Injunction

https://doi.org/10.1007/978-1-4684-2196-5t as a part of the EREQ project. The model adopts a uniform view of objects and values and separates syntactic, semantic, and implementation concerns. The algebra addresses issues of type-defined equality and duplicate elimination as well as extensions to bulk types other than sets.

Radiculopathy

同位素

Obstreperous

The AQUA Data Model and Algebrat as a part of the EREQ project. The model adopts a uniform view of objects and values and separates syntactic, semantic, and implementation concerns. The algebra addresses issues of type-defined equality and duplicate elimination as well as extensions to bulk types other than sets.

鸣叫

malign

Nested Queries in Object Baseshe query language level in order to treat common subexpressions and independent subqueries more efficiently. The transformed queries are translated to nested algebraic expressions. These entail nested loop evaluation which may be very inefficient. Hence, the second phase . nested algebraic expres­sions to allow for more efficient evaluation.

碌碌之人

How Dogmatic Can Materialism Be?n capabilities. It is shown how the module structure provides explicit support for sharing and simplifies the development of reusable components. The capability structure allows control over access to data and supports deletion of objects in a controlled manner.

恶意

How Dogmatic Can Materialism Be?ific data, etc. require database support for ordered data structures like lists, trees, and graphs. In this paper, we discuss an extension to the AQUA query algebra to handle ordered types and their operators. We show how these operators can fit into a framework for query optimization.

monogamy

Consciousness, Knowledge, and Truthcoding of . with unbounded fixpoints into flat relations. We also define a complex object logic based language with fixpoints and prove that its range restricted fragment is equivalent to . with bounded fixpoints.