CONTINUOUS QUERY PROCESSING APPARATUS AND METHOD USING OPERATION SHARABLE AMONG MULTIPLE QUERIES ON XML DATA STREAM

摘要

Provided is a continuous query processing apparatus and method using operation sharable among multiple queries on an Extensible Markup Language (XML) data stream. The apparatus, includes: a storing unit for storing a sharable operation result; a syntactic analyzation unit for performing a syntactic analysis on the registered continuous query; a semantic analyzation unit for analyzing the meaning upon receiving a syntactic analysis result from the syntactic analyzation unit; a sharable operation extracting unit for extracting a sharable operation upon receiving a semantic analysis result from the semantic analyzation unit; and a query execution unit for storing the result of the extracted sharable operation in the storing unit and performing the continuous queries on an XML data stream based on the result of the semantic analysis and the result of the sharable operation stored in the storing unit.