查詢結果分析
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頁籤選單縮合
題 名 | Specifying Schema Mapping Information in Object-Oriented Multidatabase Systems=在物件導向多資料庫系統中綱要對映資訊之描述 |
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作 者 | 趙景明; | 書刊名 | 東吳經濟商學學報 |
卷 期 | 31 2000.12[民89.12] |
頁 次 | 頁47-67 |
分類號 | 312.49 |
關鍵詞 | 綱要對映; 綱要整合; 查詢處理; 多資料庫系統; 物件導向資料庫; Schema mapping; Schema integration; Query processing; Multidatabase systems; Object-oriented databases; |
語 文 | 英文(English) |
中文摘要 | 多資料庫系統是整合多個分散式、異質性、自治性資料庫系統的一個解決方法。藉由透過單一整體資料庫綱要讓使用者查詢與更新資料,一個多資料庫系統令使用者產生單一資料庫的幻覺。綱要整合與查詢處理是多資料庫系統必須解決的兩個重要問題。過去,我們曾經提出一個在物件導向多資料庫系統中關聯式與物件導向資料庫之間的綱要整合方法。整體資料庫綱要和它的組成資料庫綱要之間的對映資訊對於查詢處理是十分重要的。因此本論文提出一個以我們的綱要整合方法為基礎的綱要對映資訊描述機制。此外,本論文也簡短地描述一個查詢處理方法,並且說明我們所提出的綱要對映機制所描述的綱要對映資訊如何協助查詢處理。 |
英文摘要 | The multidatabase system (MDBS) is a solution to the problems of interoperating distributed, heterogeneous, and autonomous database systems. An MDBS provides a single database illusion to its users by maintaining a global database schema against which its users issue queries and updates. Schema integration and query processing are two of the important issues that must be addressed in an MDBS. In our previous work, we proposed an approach to schema integration between relational and object-oriented databases in an object-oriented multidatabase system. The mapping information between a global schema and its constituent component schemas is vital for query processing. In this paper, therefore, we propose a mechanism, which is based on our approach to schema integration, for specifying the schema mapping information. In addition, we also briefly describe an approach to query processing and illustrate how the schema mapping information specified by our schema mapping mechanism can be useful for query processing. |
本系統中英文摘要資訊取自各篇刊載內容。