Computer science department andrei costea, student no 2118548 adrian ionescu, student no 2116731 query optimization and execution in vectorwise mpp master's thesis in computer science specialization: high performance and distributed computing supervisor: marcin ukowski, actian corp. Based on our observations, a cost-based query optimizer and a rule-based query optimizer are proposed to build efficient query plans we compare the performance of these two query optimizers and finally analyze the advantages and disadvantages of these two optimization strategies a study of execution strategies for. Rank-aware query processing and optimization a thesis submitted to the faculty of purdue university by ihab f ilyas in partial fulfillment of the requirements for the degree of doctor of philosophy august 2004. This thesis focuses on the challenges posed by modern hard- ware for transaction processing, query processing, and query optimization we present a concurrent transaction processing system based on hardware transactional memory and show how to synchronize data structures efficiently we further design a paral. Thesis objectives and contributions due to the large spectrum of topics that we studied in this thesis, covering: logical optimiza- tions of queries physical optimizations data warehousing optimization structures selection multi-query optimization problem, cost models, deployment phase, hypergraphs, etc it is nec- essary to.
In this dissertation, we propose novel query scheduling algorithms and query constructs whose effectiveness was demonstrated in the stream mill dsms prototype thus, we introduce on-demand timestamp generation and propagation mechanisms based on a flexible query-execution model, to solve the idle-waiting. Of parametric query optimization, identifying error-resistant and least-expected- cost plans, and minimizing the overhead of multi-plan approaches in this thesis, we investigate the plan diagram reduction issue from theoretical, statistical and empirical perspectives our analysis shows that optimal plan diagram reduction,. Further, this chapter reviews previous work related to the various phases of query processing and optimization in doing so, it points out the main differences between previous work and the research presented in this thesis chapter 3 focuses on the first step of query processing, that is the type inference of oql queries. Distributed spatial query processing and optimization nawshad farruque bachelor of science, islamic university of technology, 2009 a thesis submitted to the school of graduate studies of the university of lethbridge in partial fulfillment of the requirements for the degree master of science.
This thesis proposes the cluster-and-conquer algorithm for query optimization over database federation while efficiently considering run-time conditions i firstly propose to view the whole federation as a clustered system, by grouping data sources based on network infrastructure or enterprise boundaries and then provide. Earlier versions may not be compatible with this thesis report the research was carried out under nix platforms, so the research result is not meant to apply to other platforms this thesis will mostly concentrate on postgres configuration tuning and query optimization hardware, underlying operating system.
Query optimization is required to support declarative query interfaces it is a core problem in the area of database systems and has received tremendous attention in the research community, starting with an initial publication in 1979 in this thesis, we revisit the query optimization problem this visit is. Section 33 converting queries to cascalog is based on report of course project in computer science (mid 240) submitted to uis in 2010 autumn section 433 data file encoding and section 54 performance dependent on data structure have been submitted as part of the paper “evaluation of some optimization. Query optimization in this thesis, we presented a use case for query optimization for an in-memory column-store database management system used for both on- line analytical processing and on-line transaction processing to date, the system in question has used a naıve query optimizer for deciding on.