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公开(公告)号：EP2021951A1
公开(公告)日：2009-02-11
申请号：EP06741027.4
申请日：2006-06-01
发明人： MÖSTL, Matthias
IPC分类号： G06F17/30
CPC分类号： G06F17/30404 , G06F17/30433 , G06F17/30436 , G06F17/30587
摘要： The invention relates to a method for controlling a relational database system, wherein a request statement comprising key words is initially analysed using a recursive transition network (RTN). Said RTN consists of RTN modules which are independent from one another and each RTN module has an internal, oriented decision graph which is defined independently from the internal, oriented decision graph of the other RTN modules, said RTN comprising at least one decision position along at least one decision path. In a selection step, the internal decision graphs of all of the RTN modules are transversed by key words, and all possible paths of said decision graphs are transversed until either no coincidence is determined with the respectively selected path in the decision graph and the process is interrupted or the respectively selected path is transversed until the end.
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公开(公告)号：EP2021951B1
公开(公告)日：2010-09-01
申请号：EP06741027.4
申请日：2006-06-01
发明人： MÖSTL, Matthias
IPC分类号： G06F17/30
CPC分类号： G06F17/30404 , G06F17/30433 , G06F17/30436 , G06F17/30587
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公开(公告)号：EP1941395A1
公开(公告)日：2008-07-09
申请号：EP05799132.5
申请日：2005-10-28
发明人： MÖSTL, Matthias
IPC分类号： G06F17/30
CPC分类号： G06F17/30418 , G06F17/30421
摘要： The invention relates to a method for controlling a relational database system by executing, using a database language, a database inquiry in a relational database which comprises as the assigned data structure a plurality of data tables interlinked by relations, a table of said relations being available. A processable database instruction without relation-specific operations is established by indicating those data tables to which the processing functions should be applied and also indicating the order of the selected data tables which should be used for processing. An access path is determined which concretely specifies an access order to the database. For this purpose, a partial access path is calculated using the table of relations between two successive, selected data tables based on the relations existing between the two successive data tables. The access path is then put together from all the calculated partial access paths.
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公开(公告)号：EP1941395B1
公开(公告)日：2010-08-04
申请号：EP05799132.5
申请日：2005-10-28
发明人： MÖSTL, Matthias
IPC分类号： G06F17/30
CPC分类号： G06F17/30418 , G06F17/30421
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5.发明公开VERFAHREN ZUM STEUERN EINES RELATIONALEN DATENBANKSYSTEMS 审中-公开VERFAHREN ZUM STEUERN EINES RELATEDEN DATENBANKSYSTEMS
公开(公告)号：EP2021952A1
公开(公告)日：2009-02-11
申请号：EP07701305.0
申请日：2007-02-06
发明人： MÖSTL, Matthias
IPC分类号： G06F17/30
CPC分类号： G06F17/30404 , G06F17/30433 , G06F17/30436 , G06F17/30587
摘要： The invention relates to a relational database system, wherein a request statement which is to be serviced and which comprises key words is initially analysed using a recursive transition network (RTN) and is converted into control commands. Said method comprises the following steps: the RTN is defined in a presetting step by forming RTN modules which are independent from one another, by means of an internal, oriented decision graph and optionally at least one recursive call function; one reference group, which is independent from the RTN modules and the elements thereof referring to the remaining decision graphs released from the first decision graph thereof, is formed; a reference execution step is used and the remaining decision graph that can prescribe the recursive call function, is transversed and an optimum access plan for the relational database system is generated.
摘要翻译： 本发明涉及一种关系数据库系统，其中要被服务并且包括关键字的请求语句最初使用递归转换网络（RTN）被分析并被转换成控制命令。 所述方法包括以下步骤：在预设步骤中通过形成彼此独立的RTN模块，借助于内部的，定向的决策图和可选的至少一个递归调用函数来定义RTN; 形成一个独立于RTN模块及其元素的参考组，其参考从其第一个决策图释放的剩余决策图; 使用参考执行步骤，并且可以规定递归调用函数的其余决策图被横截，并且生成用于关系数据库系统的最佳访问计划。
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