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Method for searching data in EDB database source file

A database and source file technology, applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as search and acquisition

Active Publication Date: 2018-02-23
SICHUAN QIAODUOTIANGONG PRECISION EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the EDB database source file is damaged or cannot be opened due to other reasons, a method is needed to find and obtain the data in the EDB database source file to achieve the purpose of data recovery, but there is no way to find and obtain the data in the prior art Method of data in EDB database source file

Method used

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  • Method for searching data in EDB database source file
  • Method for searching data in EDB database source file
  • Method for searching data in EDB database source file

Examples

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Embodiment Construction

[0036] The present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments. Such as figure 1 Shown, method of the present invention comprises the following steps:

[0037] S100: find the identifier and the page length of the EDB database: as figure 2 As shown, take the first address of the EDB database 0x00000000 as the starting address, jump backward 0x04 bytes and read the content of 4 consecutive bytes 0xEFCDAB89 as the identifier of the EDB database, such as figure 2 As shown in the black rectangle box in the middle; since the identifier is stored in little-endian format, the identifier of the EDB database is 0x89ABCDEF;

[0038] Similarly, take the first address of the EDB database as the starting address, jump backward to the 0xEC byte and read the content of 2 consecutive bytes 0x0080 as the page length, such as figure 2 Indicated by the black underlined part; since the page length is stored in little-endian format,...

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Abstract

The invention discloses a method for searching data in an EDB database source file. The method is characterized by including the steps: S100: searching an identifier and the page length of an EDB database; S200: acquiring a root node page: fixing the root node page as a fifth page of the EDB database, and multiplying the page length by 5 to address to a starting address of the root node page; S300: analyzing the root node page; S400: analyzing a data page; S500: determining whether the data page is completely analyzed or not, ending a process if the data page is completely analyzed, and executing the step S400 if not. The method solves the technical problem that a method for searching and acquiring the data in the EDB database source file is absent in the prior art.

Description

technical field [0001] The invention belongs to the field of data recovery, and relates to a method for searching data in a database source file, in particular to a method for searching data in an EDB database source file. Background technique [0002] EDB database is an embedded database engine based on SQL Server CE, which provides core functions for Windows CE-based applications, and is used for storage of Microsoft exchange mailboxes and browsing records of IE10 browsers. By using EDB, developers can create an object store, called a database volume (volume), which can contain multiple databases. The database volume is file-based, so it can be easily copied and moved. [0003] When the EDB database source file is damaged or cannot be opened due to other reasons, there is a need for a method to find and obtain the data in the EDB database source file to achieve the purpose of data recovery, but there is no way to find and obtain in the prior art A method for data in an E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/24562
Inventor 梁效宁许超明赵飞何升
Owner SICHUAN QIAODUOTIANGONG PRECISION EQUIP CO LTD
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