SYSTEMS AND METHODS FOR ACCESSING A DATABASE MANAG

专利名称：SYSTEMS AND METHODS FOR ACCESSING A

DATABASE MANAGEMENT SYSTEM

发明人：AYLETT, Peter Kyra,QUINT, David

Gregory,HOPWOOD, Scott

申请号：EP17851970.8申请日：20170906公开号：EP35169A1公开日：20190731

摘要：Disclosed is a method of accessing a network of relationship instances and datafield values of entity instances in a combined entity relationship- and relational-modeldatabase management system. The method comprises the steps of receiving a query thatnatively references relationship types including data fields to be accessed; parsing thequery into a parse tree; converting the parse tree to a query graph; optimising the querygraph by consolidating equivalent nodes in the query graph; analysing the nodes in theoptimised query graph; codifying each node of the optimised query graph into a firsttable of state transition rules; codifying the data fields to be accessed into a second tableof field rules; preparing a query that includes the first and second tables; identifyingentity instances to be accessed by the prepared query by iteratively following

relationship instances according to the first table; and loading data fields of the identifiedentity instances according to the second table.

申请人：Global Software Innovation Pty Ltd

地址：Suite 27/1 Maitland Place Norwest Business Park Baulkham Hills, NSW 2153 AU

国籍：AU

代理机构：Modiano, Gabriella Diana

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