E. I. Chong. "Query Optimization in Distributed Database Systems and Multidatabase Systems ", Ph.D Thesis, Northwestern University, 1994. Home/Search Document Not in Database Summary Related Articles Check |
This paper is cited in the following contexts:
Multidatabase Query Optimization - Evrendilek, Dogac, Nural, Ozcan (1997) (Correct)
....algorithms suggested in [9] try to reduce the response time by finding cost reducing bushy inners. However, since they start with a left deep join tree and thus do not consider the bushy inners, they may miss less costly bushy trees. Multidatabase query processing, has also been addressed in [1, 3, 7, 19, 17, 23, 32]. But, 9] and [31] are the only ones that focus on intersite join optimization and only [9] has considered available parallelism to be exploited for query execution in multidatabases. The problem of improving query response time that is addressed in [9] and in our work is orthogonal to the ....
....technique is proposed in [3] as an approach to make local selections possible. Semiouterjoin operation produces two results, a semijoin and its complement. As pointed out in the paper this technique works well in all cases, no matter what the aggregation and selection conditions are. In [1] and [32] role based query processing in multidatabase systems are considered and methods are proposed. The approach suggested in [32] is based on the idea of presenting the answer to a query as a set of sets representing the distinct intersections between the relations corresponding to the ....
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E. I. Chong. "Query Optimization in Distributed Database Systems and Multidatabase Systems ", Ph.D Thesis, Northwestern University, 1994.
Query Decomposition, Optimization and Processing in.. - Evrendilek, Dogac (1994) (Correct)
....local database. Next each subquery is translated to a query or queries of the corresponding local database system and sent to a local database system for execution. Third the results returned by the subqueries are combined into the answer. Multidatabase query optimization has been addressed in [CHO 94] DKS 92] LS 92] LOG 92] MY 95] SC 94] In [CHO 94] and [SC 94] a new method for schema and data integration in multidatabase systems is presented that gives the answer to the query as a set of sets representing the distinct intersections between the relations. Furthermore extensions to ....
....or queries of the corresponding local database system and sent to a local database system for execution. Third the results returned by the subqueries are combined into the answer. Multidatabase query optimization has been addressed in [CHO 94] DKS 92] LS 92] LOG 92] MY 95] SC 94] In [CHO 94] and [SC 94] a new method for schema and data integration in multidatabase systems is presented that gives the answer to the query as a set of sets representing the distinct intersections between the relations. Furthermore extensions to MSQL are presented along with a query processing strategy ....
[Article contains additional citation context not shown here]
E. I. Chong, "Query Optimization in Distributed Database Systems and Multidatabase Systems", Ph.D Thesis, Northwestern University, 1994.
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