Invention Grant
US08954460B2 Apparatus and method for scheduling user defined operator (UDO) in data stream management system (DSMS) 有权
在数据流管理系统(DSMS)中调度用户定义运算符(UDO)的装置和方法

Apparatus and method for scheduling user defined operator (UDO) in data stream management system (DSMS)
Abstract:
An apparatus and a method of optimizing queries through scheduling User Defined Operators (UDOs) in a Data Stream Management System (DSMS), are provided. The apparatus includes a query optimizer configured to receive queries, each of the queries including the UDOs and data streams subject to respective operations of the UDOs, and group the data streams and UDOs into scheduling units, each of the scheduling units including one of the data streams and one of the UDOs. The apparatus further includes a scheduler configured to schedule an execution order in which the scheduling units are executed.
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