| 摘要: |
| 文章研究了多媒体数据库的查询需求,提出结构化的多媒体对象查询语言MOQL(multi-media object query language).它能够支持基于类型、结构特征、同步关系、时态关系和内容信息的多媒体查询.以DB2数据库为存储机制,定义了一组代数算子和变换规则,利用它们可以将用户定义的MOQL查询变换为代数表达式,进行代数优化,并将代数查询表达式转换为能够在DB2数据库上运行的DB2SQL和C++查询过程. |
| 关键词: 多媒体数据库,查询语言,查询优化. |
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| 基金项目:本文研究得到国家自然科学基金、国家863高科技项目基金和国家教育部博士点基金资助. |
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| Multimedia Object Query Language and Its Query Processing |
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TIAN Zeng-ping,DANG Hua-rui,ZHOU Ao-ying,SHI Bai-le
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| Abstract: |
| In this paper, the authors study the query requirements of multimedia database and propose a structured multimedia object query language (MOQL). The language can support queries based on type, structure, synchronous relations, temporal relations, and contents of multimedia data. Taking the DB2 relational database system as a storage mechanism, they define a set of algebraic operators and some transformation rules, by which the MOQL queries defined by the users can be transformed into a set of algebraic formula and optimized. Finally, the algebraic formula can be transformed into execution plan in DB2SQL and C++ procedures, which can be run on DB2 system. |
| Key words: Multimedia database, query language, query optimization. |
