| 摘要 |
The invention relates to a method for controlling a relational database s ystem, wherein a request statement comprising key words is initially analyse d using a recursive transition network (RTN). Said RTN consists of RTN modul es which are independent from one another and each RTN module has an interna l, oriented decision graph which is defined independently from the internal, oriented decision graph of the other RTN modules, said RTN comprising at le ast one decision position along at least one decision path. In a selection s tep, 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 pa th in the decision graph and the process is interrupted or the respectively selected path is transversed until the end.
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