Patent ID: 9147007
Filing Date: 2015-09-29
Classification: G06F

Abstract:
1. A query expression conversion apparatus that converts a user query expression for a data set storing structured data, comprising: a first generating unit that acquires the structured data from a known data set, which is a data set whose unique address has been registered, by performing a pre-determined query expression against a known data set and generates a structured data guide of the known data set by analyzing the structured data that is acquired from the known data set, the structured data guide virtually representing schema of the data set; a first storage unit that stores the structured data guide of the known data set generated by the first generating unit in association with the unique address of the known data set; an input unit that inputs a unique address of a data set to be queried and the user query expression having the structure of data as a condition; a second generating unit that, when a structured data guide corresponding to the input unique address is not stored in the first storage unit, acquires a designated number of structured data items from the data set to be queried that is identified by the input unique address and generates a structured data guide of the data set to be queried by analyzing the structured data items that are acquired from the data set to be queried; a conversion unit that converts the input user query expression so as to be suitable for the structured data guide corresponding to the input unique address and an output unit that outputs the converted user query expression converted by the conversion unit.