Query Decomposition, Optimization and Processing in Multidatabase SystemsOne way of achieving interoperability among heterogeneous, federated DBMSs is through a multidatabase system that supports a single common data model and a single global query language on top of different types of existing systems...
Decomposition - A Strategy for Query Processing (Abstract) Strategy for processing multivariable queries in the database management system INGRES is considered. The general procedure is to decompose the query into ... E Wong,K Youssefi - Acm Sigmod International Conference on Management of Data 被...
Query decomposition, optimization and processing in multidatabase systems 1. Introduction One way of achieving interoperability among heterogeneous, federated DBMSs is through a multidatabase system that supports a single common ... C Evrendilek,A Dogac 被引量: 24发表: 1970年 加载更多来源...
tuples以聚簇index指定的方式存在heap page中 Zone Maps 该方法首先给每个page统计aggregation的信息,以此决定需不需要将该page读入内存 此方法的缺点是需要维护Zone Map Late Materialization 适合于DSM(列存储:Decomposition Storage Model)存储tuple,不适合行存储的tuple,N-ary Storage Model (NSM)? 注意这里并不是ind...
IBM DB2: An enterprise-level, high-performance DBMS from IBM. Amazon RDS: A scalable and managed RDBMS service from Amazon Web Services. Google Cloud SQL: A fully-managed RDBMS service offered by Google Cloud. Azure SQL Database: A fully managed RDBMS service provided by Microsoft’s Azure ...
query processing wavelet transforms/ approximate query processing response-time requirements decision support systems sampling histograms multidimensional wavelets wavelet decomposition algorithm/ C7102 Decision support systems C4188 Integral transforms in numerical analysis C6160 Database management systems (DBMS)...
Lindbladian superoperator decomposition Have the results of any U.S. presidential election other than 2000, 2020 been widely disputed and litigated? Why try to explain the unexplainable? Can a superhero story work in novel format? What type of outlet has four vertical slots and how can ...
The present invention provides a computer-readable medium and system for selecting a set of n-grams for indexing string data in a DBMS system. Aspects of the invention include providing a set of candidate n-grams, each n-gram comprising ... VH Hacigumus,BR Iyer,S Mehrotra - US 被引量:...
6) query decomposition 查询分解 1. Research on heterogeneous spatial data system query decomposition algorithm; 异构空间数据系统查询分解算法的研究 2. An approach of global query decomposition that the global queries were transformed into middl. 使用模式映射树存储和表达用于查询分解的全局模式以及全局...
in parallel. A normalized J-tree is considered to be a candidate for decomposition if (1) any base table, T, referenced in its FROM subtree is the union of multiple, disjoint, SQL union-compatible base tables, (2) any base table referenced in its FROM sub-tree has been partitioned ...