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SQLite data deletion recovery method

A deletion recovery and data technology, applied in the database field, can solve the problems of data dislocation and difficult to restore data, etc.

Active Publication Date: 2018-05-18
THE THIRD RES INST OF MIN OF PUBLIC SECURITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It is difficult to effectively restore the deleted data when the entire page of data is deleted; in addition, when the free space is damaged or some bytes are occupied, the traditional recovery method will cause the restored data to be misplaced, which is difficult Accurately restore data

Method used

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  • SQLite data deletion recovery method
  • SQLite data deletion recovery method
  • SQLite data deletion recovery method

Examples

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Embodiment Construction

[0026] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0027] For the Sqlite data storage format, this example uses table structure information to construct feature strings for record segmentation, and then uses the same feature extraction method to construct strings to be matched for deleted data in reverse order; then use feature strings to treat Matched strings are segmented to accurately separate different records.

[0028] When sqlite stores data, the beginning of each set of data will record the column information of this set of data and the corresponding data length of this column. After getting a piece of data to be restored, find all the column header information from this piece of data, and then split this piece of data to be restored into different groups, and each group corresponds to a ...

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Abstract

The invention discloses an SQLite data deletion recovery method. Table structure information is used for constructing a feature string of record and segmentation; the feature string to be matched is constructed according to the same feature extraction method for deleted data in a reverse order mode; finally the feature string is used for segmenting a string to be matched to achieve data recovery.An SQLite deletion recovery technology proposed in the scheme can accurately locate deleted records from fragment sections and can accurately recover the deleted data records from incomplete fragments; simultaneously the recover of the data through the scheme only requires the table structure information, and different records can recover from data space where an entire page is deleted.

Description

technical field [0001] The invention relates to database technology, in particular to data deletion recovery technology. Background technique [0002] The rapid popularization of smart mobile terminals represented by smart phones has brought great convenience to people's life and work, and has become a necessity in people's daily life. [0003] The SQLite database is used by various smart terminal operating systems such as Android and iOS to store text messages, address books, call records, instant messaging communication records (such as QQ chat records and WeChat communication records), etc. These data are extremely important to users, so the deletion and recovery technology of data records emerges as the times require, and the deletion and recovery technology of data records can effectively recover data in the case of accidental deletion. [0004] At the same time, SQLite's data deletion and recovery technology is also extremely important in the forensic identification o...

Claims

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Application Information

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IPC IPC(8): G06F11/14
CPCG06F11/1415
Inventor 吴松洋熊雄张鹤张厚宝朱明哲
Owner THE THIRD RES INST OF MIN OF PUBLIC SECURITY
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