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Browsing by Subject "SBQL"

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    Item type:Article, Access status: Open Access ,
    Implementacyjne aspekty otwartej platformy transportowej opartej o Peer-to-Peer
    (Wydawnictwa AGH, 2006) Kuliberda, Kamil; Wiślicki, Jacek; Kowalski, Tomasz Marek; Błaszczyk, Piotr; Balcerzak, Grzegorz; Adamus, Radosław
    The paper presents the results of investigations concerning an open transport platform that can be used to build grid applications based on object-oriented databases. The described research has been focused on implementation of previously published project assumptions. The presented cases comprise: centralized architecture of a network for a transport platform, utilization of the JXTA technology for building a virtual network, foundations of a communication protocol for the network and an example of its application. An example of a transport platform integrated with an external user application is presented. All the described features are operating within the prototype.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Metody optymalizacji przez indeksowanie dla obiektowego języka zapytań
    (Wydawnictwa AGH, 2009) Kowalski, Tomasz Marek; Cebula, Paweł; Kuliberda, Kamil; Wiślicki, Jacek; Adamus, Radosław
    In paper we present an overview of query optimization by indexing for SBQL (Stack-Based Query Language). Developed methods have been implemented and tested in ODRA prototype system. The ODRA index implementation is based on linear hashing and works in a scope of a standalone database. It consists of transparent optimization, automatic index updating and management facilities. The semantic equivalence of proposed query optimization methods in the context of object data model and query language is discussed on several examples.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Uogólnione podejście do aktualizacji indeksów w obiektowej bazie danych
    (Wydawnictwa AGH, 2009) Kowalski, Tomasz Marek; Kuliberda, Kamil; Draus, Cezary; Adamus, Radosław; Wiślicki, Jacek
    We describe a generalized approach to the problem of the automatic index updating in response to modification of corresponding data. To enable creation and transparent maintenance of indices supporting keys defined using arbitrary, deterministic and side effects free expressions the authors propose applying a special kind of database triggers. Query language for object-oriented model (classes, inheritance, polymorphism, class methods, etc.) allows easy defining of more complex selection predicates, nevertheless, in order to provide full indexing transparency, index updating requires substantial revising. Inadequate index maintenance can lead to serious errors in query processing. The authors work is based on the Stack-Based Architecture (SBA) and has been implemented in the ODRA (Object Database for Rapid Applications Development) OODBMS prototype.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Zastosowanie otwartej platformy transportowej Peer-to-Peer do połączenia i integracji obiektowych baz danych w architekturze DataGrid
    (Wydawnictwa AGH, 2006) Kuliberda, Kamil; Wiślicki, Jacek; Kowalski, Tomasz Marek; Błaszczyk, Piotr; Balcerzak, Grzegorz; Adamus, Radosław
    The paper presents the first stage of accomplishing a DataGrid concept by utilizing an open transport platform based on the peer-to-peer architecture. Implementation details concerning integration of object-oriented databases with the prototype of a transport platform are described. The prototype solution enables one to accomplish a grid network integrating distributed object-oriented data-bases.