Domain Specific Continuous Queries Implemented using Database Management Systems
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Typ
Examensarbete för masterexamen
Master Thesis
Master Thesis
Program
Computer science – algorithms, languages and logic (MPALG), MSc
Publicerad
2016
Författare
Lindgren, Anton
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
We present an alternative to Continuous Queries, these are queries that deliver streams of data to clients as opposed to common queries which only respond with a single response. We define Domain Specific Continuous Queries as a query that, apart from an initial response with the matching set of records, streams all updates affecting the query. We implement this definition of a Continuous Query for a specific domain where an existing solution and problem definition already exists. The new implementation uses classic query-response database systems to supply the initial response. A persistent data structure containing the full state of the data is kept in memory, which allows our prototype to deduce which queries an incoming update affects. The new implementation is on par with the existing solution’s feature set and greatly outperforms it for our metrics. Especially for initial response latency.
Beskrivning
Ämne/nyckelord
Data- och informationsvetenskap , Computer and Information Science