Data/hora: 16/06/2024 00:28:42

Biblioteca(s): | Embrapa Agricultura Digital; Embrapa Unidades Centrais.
Data corrente: | 30/09/1996
Data da última atualização: | 30/09/1996
Autoria: | NASCIMENTO, M. A.
Afiliação: | Embrapa-CNPTIA.
Título: | Efficient indexing of temporal databases via B+-trees.
Ano de publicação: | 1996
Fonte/Imprenta: | 1996.
Páginas: | 129 f.
Idioma: | Inglês
Notas: | Doctor of Philosophy Thesis - Southern Methodist University.
Conteúdo: | Temporal databases has been the object of research  for more than two decades, and a wealth of material has been published. However, the majority of papers have dealt with modelling and query languages issues, relatively little research has addressed implementation issues. In this dissertation we investigate the topic of indexing temporal databases, focusing on valid time databases (where valid time is the dimension indexed) and bitemporal databases (where both valid time and transaction time are indexed). As the first contribution of this dissertation, we propose a simple, yet effective, B+-tree based approach for indexing ranges, particulary valid time ranges. We call this approach MAP21. Our research show that MAP21 has good performance while being feasibly implementable on top of facilities provided by existing commercial database management systems. The second contribution we present is a set of indexing structures for bitemporal databases, which also use the B+-tree as a basic framework. The main idea behind the design of such structure is the trade-off between query processing time and size of the index. This trade-off is analysed via analytic performance studies.
Palavras-Chave: | Access structures; B-tree; Banco de dados temporais; Base de dado; Base de dado temporal; Estruturas de acesso; Indexacacao; Indexing; Tempo de transacao; Tempo de validade; Temporal databases; Transaction time; Valid time.
Thesaurus Nal: | databases.
Categoria do assunto: | --
Registro original: | Embrapa Agricultura Digital (CNPTIA)

Exemplares:

CNPTIA - (4292-1) - UPC - TS - -- -  -  - 1996.00008 - DIS
AI-SEDE - (6029-1) - ADD - TS - -- - 96/009 - NAS - 1996.00009 - DIS