L.Fegaras. VOODOO: A Visual Object-Oriented Database Language For ODMG OQL. ECOOP Workshop on Object-Oriented Databases 1999, 6172.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....allows one to transform a form based interface designed for object browsing, into a query formulation tool. Another seamless approach to extend the pointwise browser into a visual query interface, is to integrate its underlying principles into the visual interface to ODMG s OQL reported in [Feg99] Data contained in a temporal database may either be timestamped so as to reflect the evolution of the modeled reality (valid time) or to reflect the time when it was inserted deleted into from the database (transaction time) In the former case, the database is said to be historical, while in ....

L. Fegaras. VOODOO : a visual object-oriented database language for ODMG OQL. In Proc. of the ECOOP Workshop on Object-Oriented Databases, Lisbon, Portugal, June 1999.

....allows one to transform a form based interface designed for object browsing, into a query formulation tool. Another seamless approach to extend the pointwise browser into a visual query interface, is to integrate its underlying principles into the visual interface to ODMG s OQL reported in [Feg99] ....

L. Fegaras. VOODOO : a visual object-oriented database language for ODMG OQL. In Proc. of the ECOOP Workshop on Object-Oriented Databases, Lisbon, Portugal, June 1999.

....a language called OQL, which is C code with embedded DML commands to perform transactions, queries, updates, etc. The preprocessor translates OQL programs into C code that contains calls to the DB evaluation engine. We also provide a visual query formulation interface, called VOODOO [Fegaras 1999b] and a translator from visual queries to OQL text, which can be sent to the DB OQL interpreter for evaluation. Our OQL optimizer is expressed in a very powerful optimizer speci cation language, called OPTL, and is implemented in a exible optimization framework, called OPTGEN, which extends ....

....a table (known as memoization in programming languages) We are planning to investigate all these approaches more thoroughly and choose one that best ts our unnesting algorithm. We are currently developing a formal framework for optimizing object oriented queries in the presence of side e ects [Fegaras 1999a] These queries may contain object updates at any place and in any form. We have proposed a language extension to the monoid comprehension calculus to express these object oriented features and we have given a formal meaning to these extensions. Our method is based on denotational semantics, ....

Fegaras, L. 1999b. VOODOO: A Visual Object-Oriented Database Language for ODMG OQL. In 1st ECOOP Workshop on Object-Oriented Databases, Lisbon - Portugal (June 1999), pp. 61-72.

....a language called OQL, which is C code with embedded DML commands to perform transactions, queries, updates, etc. The preprocessor translates OQL programs into C code that contains calls to the DB evaluation engine. We also provide a visual query formulation interface, called VOODOO [Feg99b] and a translator from visual queries to OQL text, which can be sent to the DB OQL interpreter for evaluation. Our OQL optimizer is expressed in a very powerful optimizer speci cation language, called OPTL, and is implemented in a exible optimization framework, called OPTGEN, which extends ....

L. Fegaras. VOODOO: A Visual Object-Oriented Database Language for ODMG OQL. In 1st ECOOP Workshop on Object-Oriented Databases, Lisbon - Portugal, June 1999.

....VOODOO using a number of visual queries (Section 2) Section 3 presents a type inference algorithm to typecheck visual queries. Finally, in Section 4 we list the limitations of our language and in Section 5 we compare our work with existing query formulation tools. The full version of this paper [8] presents a formal framework for compiling visual queries into OQL queries. Even though our work has a formal basis (a VOODOO template is nothing but a monoid comprehension [10] we decided not to express the semantics of VOODOO queries in terms of comprehensions but, instead, to translate them ....

....top of the other button. Joins are permitted if at least one path to the closest common ancestor from the two participating attributes does not include a template with an accumulator (this restriction is justified in the formal description of the framework, given in the full version of this paper [8]) The join line is red in the beginning and becomes green only when the participating attributes have the same derived type and satisfy the restriction mentioned above. Our system does not permit invalid joins. The equal sign in the middle of the join line is a menu that allows the selection of a ....

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L. Fegaras. VOODOO: A Visual Object-Oriented Database Language for ODMG OQL (extended version). Available at http://lambda.uta.edu/voodoo.ps.gz, March 1999.

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L.Fegaras. VOODOO: A Visual Object-Oriented Database Language For ODMG OQL. ECOOP Workshop on Object-Oriented Databases 1999, 6172.

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