One variable query processing on a relational database was studied and implemented. As a query language, QUEL was chosen. The system accepts only one variable RETRIEVE queries in QUEL.
The LR parsing technique was used to analyze queries syntactically. The one variable query processor was designed.
Further extension was considered in design time. The first phase of the system would be expanded with slight modifications.
The system was implemented on Four-Phase computer.
Relational database에서의 one variable query processing 이 연구되고 설치되었다. Query Language로서 QUEL을 사용하였는데 그 중에서 RETRIEVE command만을 설치하였다.
LR parsing 기술을 이용하여 query를 syntactic하게 분석할 수 있었다. Parsing 결과를 처리하기 위한 one variable query processon가 설계 되었다.
차후 extension을 가능한 한 쉽게 되도록 했다. 즉 multi variable query까지 처리하기 위해서는 parsing 부분은 약간만 고침으로써 쉽게 되도록 했다.
이 system은 Four-Phase/Sη Ø computer에 설치되었다.
