Patent ID: 8131721
Filing Date: 2012-03-06
Classification: G06F,H03M,Y10S

Abstract:
1. A computer-readable recording medium storing therein an information retrieval program that causes a computer to execute: acquiring a numerical value defining a boundary of a numerical value range; detecting a number of places in and a head numeral of the numerical value acquired at the acquiring; extracting from a group of bit strings indicating, according to file, whether numerical values in a numerical value group meeting a number of places and a head numeral are present in files subject to retrieval, a bit string indicating, according to file, whether a numerical value in a numerical value group having the number of places and the head numeral detected at the detecting is present in files subject to retrieval; specifying, among the files subject to retrieval, a file corresponding to a bit in the bit string extracted at the extracting, the bit indicating a presence of a numerical value of the numerical value group having the number of places and the head numeral detected at the detecting; determining whether an in-file numerical value included in the file specified at the specifying meets a boundary condition of the numerical value defining the boundary; and designating, as a file having a numerical value within the numerical value range, the file specified at the specifying, based on a determination result obtained at the determining.