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Join processing system and method for joining relations based on join fields in a relational database
Join processing system and method for joining relations based on join fields in a relational database
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机译：基于关系数据库中的联接字段的联接处理系统和联接方法
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摘要
This invention provides a join processing system and method, which operates efficiently without a burden to a master processor, in a relational database on a multiprocessor. In a system which includes a master processor, multiple slave processors and disk drives, data is distributed and stored in the disk drives. Each of the slave processors retrieves a first sub-table and transfers the table to the master processor, and the master processor creates a first main table. Each of the slave processors retrieves the second data selectively with reference to the first main table, and creates a second sub-table. The master processor merges the second sub-tables, and creates a second main table. Then, a join processing of the first main table and the second main table is performed.
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