OPTIMIZATION METHOD FOR INQUIRY TO RELATED DATABASE MANAGEMENT SYSTEM AND SYNTAX ANALYTICAL METHOD OF RESULT

摘要

PURPOSE: To provide a method for optimizing inquiry to a RDBMS and a sentence structure analyzing method which is useful to the optimizing method. CONSTITUTION: A tree 32 expressing the execution plan of an inquiry 10 to an RDBMS is prepared and the tree is displayed on a screen 25. Then a sentence structure graph is prepared by performing sentence structure analysis on the inquiry 10 and such an element that is only contained in the graph is added to the tree by comparing the elements of the graph with those of the tree.