http://doi.acm.org/10.1145/382272.382273 db/journals/sigmod/OHareS89.html Anthony B. O'Hare Amit P. Sheth The Interpreted-Compiled Range of AI/DB Systems. 32-42 sigmodR/18-1/P032.pdf 1989 18 SIGMOD Record 1 db/journals/sigmod/sigmod18.html#OHareS89