Method for controlling a relational database system

Details Method for controlling a relational database system Method for controlling a relational database system

2011-05-03

2011-05-03

Woo, Isaac M (Department: 2166)

Data processing: database and file management or data structures

Database and file access

Preparing data for information retrieval

C707S706000, C707S713000, C707S722000, C707S758000, C707S781000

Reexamination Certificate

active

07937390

ABSTRACT:
A method for controlling a relational database system, wherein a query statement to be processed, which consists of keywords, is first analyzed by applying a recursive transition network (RTN) and then converted into control commands by the following steps: defining the RTN in a presetting step by forming independent RTN building blocks each having an inner, directed decision graph and optionally at least one recursive call function; forming an RTN building block-independent reference group, the elements of which refer to a residual decision graph with the first decision position removed; carrying out a reference processing step and running the residual decision graphs, which may prescribe the recursive call function; and generating an optimized access plan for the relational database system.

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