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Method to query an embedded database

A database and data technology, applied in database model, relational database, digital data processing and other directions, can solve problems such as excessive consumption of resources

Inactive Publication Date: 2005-05-04
SCHLUMBERGER IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is impossible to efficiently operate between database tables due to excessive resource consumption

Method used

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  • Method to query an embedded database
  • Method to query an embedded database
  • Method to query an embedded database

Examples

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Embodiment Construction

[0030] In order to simplify the description, the same elements illustrated in the drawings have the same reference numerals.

[0031] Figure 1 represents a computer system SYS on which the method of the invention can be implemented. This system includes a plurality of servers commonly connected via a network RES1 (LAN, WAN and Internet, etc.). In our example, this system includes server SERV1. This server is a database whose data language is SQL known to those skilled in the art.

[0032] In our example, the cell phone POR communicates with this server SERV1 to exchange data. The phone includes a smart card CAR with an electronic module MOD. The data exchange between the server SERV1 and the cell phone POR may include eg updating of data stored in the smart card CAR.

[0033] The present invention is not limited to this implementation example. Any device such as a reader LEC connected to a PC has been able to be used as an example to illustrate the invention.

[0034] Th...

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Abstract

The solution concerns a method to query a relational database stored on a computer comprising a microcontroller, said database comprising at least a table composed of columns and rows including data accessible via a cursor. The method includes the following steps: Before executing the cursor, declare a cursor by systematically selecting all columns in the table concerned by the cursor, execute the cursor, after execution, select columns using a SEARCH command capable of selecting columns in the cursor result.

Description

technical field [0001] The present invention relates to methods of querying data stored in databases of data processing devices (also called computers), such as cellular phones, electronic assistants, smart cards, and the like. Note that a data processing device of a computer is also referred to by those skilled in the art as a programmable machine capable of processing information. [0002] The example chosen for the purpose of illustrating the invention is that of a smart card. The language currently used for smart cards is a subset of SQL (Structured Query Language), called SCQL (Structured Card Query Language). SCQL is a relational database query language described in the standard OSI 7816-7 published by ISO (International Organization for Standardization). [0003] In conclusion, the invention applies to any existing or will have database whose model will be similar to that of the relational model. Background technique [0004] SQL databases include objects. These o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F17/30595G06F16/284
Inventor 乔格·埃布兰塞维拉里卡多·马勒帕雷贾
Owner SCHLUMBERGER IND INC
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