An APL based relational data management language using SYSTEM R as data server
F. Antonacci, Piero Dell'Orco · ACM SIGAPL APL Quote Quad · 1985
This report describes a system for accessing System R, via AQL, a query language based on APL, developed by IBM Italy Scientific Centers. System R and AQL reside in two different Virtual Machines: the DB Machine and the User Machine, respectively. The two Machines communicate through VMCF, an inter-machine communication facility in VM/370 environment. Queries formulated in AQL are shipped to System R, translated into SQL (the native query language of System R) and the results brought back to the User Machine. The major advantage of this architecture is easiness of implementation and separability between the two environments. From the user's standpoint, this approach combines a friendly and flexible query language with a powerful data manager.