查詢重寫 的英文怎麼說
中文拼音 [zhāxúnzhòngxiě]
查詢重寫
英文
query rewrite-
If your repository does not support these types of doubles negatives, then this can affect how you rephrase this query into your repository s terms
如果存儲庫不支持這些類型的雙重否定,那麼這會影響如何將這個查詢改寫為存儲庫的查詢詞。When a query on the relational views is issued, it is repeatedly rewritten using the rules. this process generates number of navigation plans to compute the query ; the cost of these plans is then estimated based on a simple cost model that takes network accesses as the primary cost parameter. in this way, an efficient execution plan is selected for processing the query
當根據關系視圖發出一個查詢時,它被重復的使用重寫規則來重寫,這個過程產生大量的導航方案來運算查詢。這些方案的代價是根據代價模型來評估的。代價模型是用網路訪問作為原始的代價參數。Then it presents the application situation of many important standards, and focuses on analyzing the mapping relationship between files. thus, it builds the method for reading and writing operations on the original library information data and realizes a series of information management work of the parts library data files, such as search, input and refreshment
論文闡述了不同標準的應用環境,重點分析了文件間的映射關系,建立了對原有庫信息數據的讀寫操作和相應的數據轉換途徑,並完善了零件庫數據文件的查詢、錄入、更新等一系列信息的管理工作。Very large data bases, santiago de chile, chile, september 1994, pp. 85 - 95. 19 bernstein p a, goodman n et al. query processing in a system for distributed database sdd - 1
接著介紹了包括語義瀏覽器可視化語義映射與注冊以及查詢重寫與分配等一組支持數據庫集成和語義信息檢索的工具。When the report is processed, the expressions are evaluated using the current parameter settings
將參數定義為多值參數並且查詢使用in語句指定參數時,將觸發查詢重寫。This paper uses query processing as a main line, discusses and researches query rewriting, query optimization technology
論文以查詢處理為主線,對查詢重寫、查詢優化技術進行了討論和研究。If you do not, processor time will be wasted loading view state into the server control that will only be overridden by the database query
如果不這樣做,處理器時間將浪費在將視圖狀態加載到服務器控制項上,而這些狀態只是由數據庫查詢重寫。Since 1999, she has worked in many areas of federated query compilation, including query semantics, query rewrite, pushdown analysis and query optimization
從1999開始,她從事過聯邦查詢編譯的很多領域,包括查詢語義、查詢重寫、下推分析和查詢優化。Finally, we adopt this method in the design of our query rewriting component of cbase. the test result shows that the performance of cbase has been dramatically improved
最後本文將這種形式化方法應用在cbase系統的查詢重寫器的設計中,測試結果表明:應用查詢重寫器后的系統效率有了顯著提高。We mainly study the query optimization technique of relational database systems. based on the requirement of the cbase, we put forward a suit of rewriter rules that are used in query optimization module
本文主要研究了關系數據庫中的查詢優化技術,並且根據cbase數據庫系統的需求,提出了一套完整的查詢重寫規則用於查詢優化模塊。As virtual database uses relational data model, the paper makes a special effort to discuss query rewriting technology - rewriting queries using views and its conjunctive query, containment mapping under this model
基於虛擬數據庫所採用的關系數據模型,著重探討了該模型下的查詢重寫技術? ?利用視圖重寫查詢以及基於其上的合取查詢、包含映射等問題。The formal semantics of sql is the theoritical foundation of query rewriting, but there is no satisfying method to translate sql into a canonical form. in this paper, we propose a better formalizing method for sql which is more succinct
Sql的形式語義是查詢重寫研究的理論基礎,本文在前人工作的基礎上,提出了一種更加完善的形式化方法,不但消除了以往形式化方法的部分不足,而且從形式上也更為簡潔、直觀。The feature of xrdb system is follow : the relation of xml element and it ' s son is keeped by relation - dictionary, as the same time the relation - dictionary keeped the element attributes, content and their corresponding in relation database. in order to get the more efficiency relation table, the dom tree of xml schema is trimed for getting orderliness xml schema. for efficiency rewrited path expression into sql, the relation dictionary keeps every xml element ' s absolute path
Xrdb系統的主要特色有:用關系字典保存xml元素的父子關系,元素的屬性,內容以及它們對應的關系數據庫表名,列名;對xml模式的dom樹進行修剪,使xml模式整潔,從而使映射得到的關系的更合理;關系字典保存了每個元素的絕對路徑,可以快速地把路徑查詢重寫為結構化查詢; xrdb的查詢結果是原來xml文檔的文檔片段。The experiments prove that th ~ rewriter rules are effective and genetc algorithm has obvious advantage while processing multi - join query
結果表明,本文提出的重寫規則是很有效的,遺傳演算法在處理多連接查詢時具有明顯的優越性。We use a navigational algebra as the target ganguage the describes navigation plans and we show how to us rewrite rules in the spirit of relational optimizers and, taking link and inclusion constraints into account, to reduce the number of page accesses needed to answer a query
我們使用引導代數( navigationalalgebra )作為描述導航方案的目標語言,同時我們在研究最優化關系抽象中使用重寫規則,將鏈接約束和包含約束引入到運算中,以便在回答查詢中,減少大量需要訪問的頁面數量。Views on other hand do not have to be materialized and normally executed by rewriting the query
視圖則不同,它無需被顯式處理,只是把查詢簡單地重寫了一下。Assigns an internal rewrite path with additional path and query string information
指定具有附加路徑和查詢字元串信息的內部重寫路徑。Then we novelly adopt " answering queries using views " technique into xml query reformulations. the mechanism can express fine - grained differences between data sources. the author also developed an algorithm which reformulate user ' s query on mediated schema into subqueries that refered directly to the schemas of the sources
採用在xml的中介模式上的視圖定義來描述數據源的內容,第一次在xml的集成查詢中使用「利用視圖重寫查詢技術」 ,使得模型化數據源內容間的微妙差別成為可能。Rewrite the query to produce a different query execution plan
重寫查詢以生成不同的查詢執行計劃。You may sort the search result by salary, relevant experience or education level. you can define the sorting criteria when you fill in the search form or at the " search result " page
你可於填寫查詢表格或顯示查詢結果時,以求職者的薪酬、相關經驗或教育程度把查詢結果重新排序。分享友人