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GENERATION OF ARCHIVER QUERIES FOR CONTINUOUS QUERIES OVER ARCHIVED RELATIONS

机译:归档关系上连续查询的归档查询的生成

摘要

A method may include receiving a continuous query identified by an archived relation associated with an application. The method may also include generating a physical query plan. Additionally, the method may include constructing a structured query language (SQL) equivalent expression corresponding to an attribute utilized by the operator and/or constructing an output SQL expression for the identified operator based at least in part on the SQL equivalent expression. Additionally, the method may include constructing the archiver query for the identified operator based at least in part on the output SQL expression. Further, the method may include executing the archiver query to obtain a result set of data records related to the application and/or generating a snapshot output of one or more data values related to the application based at least in part on the result set of data records.
机译:一种方法可以包括接收由与应用程序相关联的存档关系所标识的连续查询。该方法还可以包括生成物理查询计划。另外,该方法可以包括:至少部分地基于SQL等效表达式,构造与操作符所利用的属性相对应的结构化查询语言(SQL)等效表达式;和/或为所识别的运算符构造输出SQL表达式。另外,该方法可以包括至少部分地基于输出SQL表达式来构造用于所识别的运算符的存档器查询。此外,该方法可以包括执行存档器查询以获得与应用程序有关的数据记录的结果集和/或至少部分地基于数据结果集生成与应用程序有关的一个或多个数据值的快照输出。记录。

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