Patent ID: 8959090
Filing Date: 2015-02-17
Classification: G06F

Abstract:
1. A method of using a computer system for physical database design, said method synthesizing a physical schema for a relational or object-relational logical schema in a database, said synthesized physical schema is obtained by creating files and assigning attributes to said files, said method also including: a) vertical partitioning, said vertical partitioning allocating attributes of a single relation to two or more subrelations, each represented by a file, said attribute allocation allowing a replication of one or more attributes; b) attribute replication, said replication involving attributes of a same relation replicated in different partitions of said relation, or attributes belonging to different relations; c) horizontal partitioning, said horizontal partitioning allocating the records of a single relation to two or more subrelations, each represented by a file, according to a criterion based on a value of one or more attributes of said relation; and d) encoding of one or more attributes of a relation, said encoding representing values of said attributes by system-generated codes, and using an external lookup table including said system-generated codes and said values to find the value corresponding to a specific system-generated code, where said system-generated codes are primary keys of said lookup table, said lookup table is shared by attributes with a same underlying domain.