Information management method, information management program, and information management device

A non-transitory computer-readable recording medium storing therein an information management program that causes a computer to execute a process comprising:

• converting a range criterion of space-time data being a search object into a bit string with respect to a space-time database which uses, as a key, a forward bit string of a bit string converted from space-time data including time data and positional data and which stores, as a value, corresponding data that corresponds to the space-time data;
• converting, when an index pattern of a first index that corresponds to a forward bit string of a bit string converted and an index pattern of a second index that corresponds to the key stored in the space-time database differ from each other, the first index into a third index of a same index pattern as the index pattern of the second index;
• and
• searching for the key using the third index and outputting, as a search result, corresponding data included in a value of the searched key.

An information management apparatus that manages a space-time database which uses, as a key, a forward bit string of a bit string converted from space-time data including time data and positional data and which stores, as a value, corresponding data that corresponds to the space-time data, the information management apparatus comprising:

• processing circuitry configured to:
• convert a range criterion of space-time data being a search object into a bit string;
• convert, when an index pattern of a first index that corresponds to a forward bit string of a bit string converted and an index pattern of a second index that corresponds to the key stored in the space-time database differ from each other, the first index into a third index of a same index pattern as the index pattern of the second index;
• and
• search for the key using the third index and output, as a search result, corresponding data included in a value of the searched key.