CrowdOp: Query Optimization for Declarative Crowdsourcing Systems
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CrowdOp: Query Optimization for Declarative Crowdsourcing Systems
Abstract— CrowdOp: Query Optimization for Declarative Crowdsourcing Systems. We study the query optimization problem in declarative crowdsourcing systems. Declarative crowdsourcing is designed to hide the complexities and relieve the user the burden of dealing with the crowd. The user is only required to submitan SQL-like query and the system takes the responsibility of compiling the query, generating the execution plan and evaluating in the crowdsourcing marketplace.< Final Year Projects 2016 > A given query can have many alternative execution plans and the difference in crowdsourcing cost between the best and the worst plans may be several orders of magnitude. Therefore, as in relational database systems, query optimization is important to crowdsourcing systems that provide declarative query interfaces.
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