Execution method for query with criterion in database system involves using relative tensor for carrying-out query in memory of computer system based on produced statistics, in order to process query

摘要

The processing of the relative tensors with several orders is performed in order to generate the statistics to the criterion in a user query. The relative tensor is used to carry-out a query in the memory of a computer system from two possible approaches based on the produced statistics, in order to process the query. The predetermined orders of the relative tensors correspond to the individual attributes and coordinates corresponding to the evaluation of the relevant attributes along the order of the relative tensors and the numeric values at the coordinate positions of the relative tensor. The attribute values correspond to the coordinates of the numeric value along the orders of the relative tensor. Independent claims are also included for the following: (a) a relative tensor generation method; (b) a query execution device; (c) a relative tensor generation device; (d) and a signal carrier medium.