Collation control device, and collation control method

A collation control method executed by a computer, the collation control method comprising:

• receiving a retrieval request with a retrieval character string;
• adding control information to a region corresponding to code information included in a management region used for extending encoded data when an extension result of the code information matches a first character of the retrieval character string when the encoded data to be retrieved is sequentially extended in response to the retrieval request;
• and
• performing collation processing between the retrieval character string and character string information corresponding to data of the extension result of the code information when the control information is added to a partial region corresponding to code information to be extended in the extension.

A collation control device comprising:

• a processor;
• and
• a memory, wherein the processor executes:
• receiving a retrieval request with a retrieval character string;
• adding control information to a region corresponding to code information included in a management region used for extending encoded data when an extension result of the code information matches a first character of the retrieval character string when the encoded data to be retrieved is sequentially extended in response to the retrieval request;
• and
• performing collation processing between the retrieval character string and character string information corresponding to data of the extension result of the code information when the control information is added to a partial region corresponding to code information to be extended in the extension.