efficient query execution plan
Effective Cost Models for Predicting Web Query Execution Cost
... classical query optimizers use sophisticated cost models to compute the cost of executing a particular ...This query cost is composed of individual cost of the operators that are part of the final ...
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SPARQL Query Optimization for Structural Indexed RDF Data
... effective query optimizer to solve the challenges of data indexing and query optimization, ...enhance efficient data storage and retrieval for SPARQL query ...For query processing, an ...
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Title: A Framework for Optimizing Distributed Database Queries Based on Stochastic Fractal Search
... distributed query processing first of all initial query is decomposed into fragment queries which operate on fragments rather than on global relation(data ...A Query Optimizer is used to generate ...
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Reducing Run time Execution in Query Optimization
... cost plan. It solely depended on the plan as it will execute the query relatively fast, using the least amount of resources, CPU and ...less efficient plan in case of it will take more ...
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Query Privacy And Data Confidentiality Using Random Space Perturbation In The Cloud
... original query condition constructs a hypercube shape. With the described query transformation, the vertices of the hyper cube are also transformed to vertices of the ...range query result to the ...
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Toward Efficient SIMT Execution -- A Microarchitecture Perspective.
... To support precise interrupts, outstanding instructions’ execution results (or loaded values) are kept in the data value field rather than updating the register file out-of-order. If each warp has its own ...
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Generalizing the Optimality of Multi-Step k-NN Query Processing with RASP Data Perturbation in the Cloud
... the query servicesand the protected ...original query q to the protected form q′ that can be processed on the perturbed data; (3) H (q′ , D′ ) is the query processing algorithm that returns the ...
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Applying Twister to Scientific Applications
... MPI BLAST uses the MPI library [17] to support parallel BLAST computations. It modifies the original BLAST program through a combination of the NCBI toolkit [18] and the MPI library. The query and the database are ...
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An XML-algebra for Efficient Set-at-a-time Execution
... Optimizing transformations include reordering, removal, and replacement of op- erations. The goal of optimizing reordering is to make the intermediate results created during the plan execution smaller. With ...
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QUERY PROCESSING IN A RELATIONAL DATABASE MANAGEMENT SYSTEM
... Volcano query processing system (which is based on iterators), most of the sort work is done during open-sort [Graefe 1990a; Graefe ...complex query plan, and the sort operator can be inserted into a ...
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Neural Enquirer: Learning to Query Tables in Natural Language
... ilar complexity as a real-world one, except for the relatively small vocabulary. The queries are flexible enough to involve complex matching between NL phrases and logical constituents, which makes query ...
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Scaling Complex Analytical Processing on Graph Structured Data Using Map Reduce
... “pivoting” query whose result is a relation (CustID, Total_NY, ...a query expression is cumbersome and optimizers don‟t often select the best execution plan for ...
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A SURVEY OF SCHEDULING ASPECT IN GRID COMPUTING
... does. Efficient utilization of the grid environment requires large amount of computing ...and execution of jobs in a dynamic environment like Grid often calls for efficient algorithms to schedule the ...
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SPARQL QUERY OPTIMIZATION CATEGORIES: A BRIEF SURVEY
... SPARQL query rewriting, (b) modeling of the mappings between a source ontology and the target ontologies, (c) rewriting of the SPARQL queries posed over a source ontology in terms of the target ...ontologies. ...
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A Distributed Storage and Query Subsystem for Collaborative Data Sharing
... Distributed query processing as a eld dates back almost to the beginning of the relational database era. Some in uential early systems, such as IBM’s System R* (Lindsay et al., 1984) and the Com- puter Corporation ...
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Detection of Spatio Textual Top K Queries in Location Based Services Using Reverse Keyword Search
... spatio-textual query retrieves the best objects with respect to a given location and a keyword ...new query, a novel hybrid index Keyword count R-tree (KcR-tree) to store and summarize the spatial and ...
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Evaluating Generalized Path Queries by Integrating Algebraic Path Problem Solving with Graph Pattern Matching.
... of query processing, this is a limited approach because of the limited opportunity for decomposition and ...algebraic query interpretation framework results on falling back on traditional graph algorithms ...
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Distributed Handler Architecture (DHArch)
... Efficient, scalable, modular and transparent Concurrent handler execution Pipelining for the message execution Two-level orchestration for the distributed handlers Queuing to regulate fl[r] ...
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Estimation of Query Execution Time in Milli Seconds, Micro Seconds and Nano Seconds for Oracle, MsSQL and MsAccess Relational Databases
... The present work related to database to managing query execution by estimating and monitoring query processing time. Regardless of the particular architecture of RDBMS, a requesting entity (eg. an ...
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HEURISTIC APPROACH FOR OPTIMIZATION OF LOAD BALANCING IN DISTRIBUTED SYSTEMS
... The development of a distributed database system requires effective solutions to many complex and interrelated design problems. The cost dependencies between query optimization and data allocation on distributed ...
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