DEVELOPING A METHOD FOR QUERYING EXTERNAL DATABASE IN PROLOG

The paper presents a method used for querying external Database in PROLOG programming language environment. The method is based on coupling of two methods used in deferent application environments. This method is complementary indexing techniques, Bit-Mapped and B+Tree. The proposed method is very compact and fast to resolve a query, since they use bitwise operations, which are executed quickly by most computers. The method provides the capability of allowing powerful and fast data retrieval from external database in the PROLOG language, even though there is no direct query command is available for the user; therefore, this method can be used to utilize PROLOG language for external database for powerful querying. Since PROLOG language usually dealing with internal database, which is composed of facts and rules, which can be added directly into and remove from PROLOG program at runtime. PROLOG provided with many built-in predicates to add new facts and to remove existing facts to/from the database. Therefore, this method will be augment PROLOG programming language to deal with the external database in powerful and efficient manner. The method has been in experiment database for large amount of records, which are more than 100000 records, and shows the effectiveness in the retrieval of records in term of speed, which is faster than in the ordinary manner. The development of this method is based on the methodologies of both relational database and logic programming aspects. In this paper is the description of the steps which are necessarily for adaptation in real-world domain