Database compressing and decompressing method

Abstract

The invention discloses a database compressing method which comprises: establishing compressing method set for each type of database element group and numbering the compressing method; according to the type of the database element group to select corresponding compressing method and putting its number on the head of the compressed element group; compressing the property value with the method that corresponds to the number and putting the compressed property value in the compressed element group. The invention also discloses a database decompress method which comprises selecting the compress method number from the head of element group; decompressing the element group property value according to its compressing method; putting decompressed property value in the decompressed element group.

Description

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AI Technical Summary

Problems solved by technology

[0004] There are two main problems in using the above compression method for database compression: one is that the above compression method is suitable for compressing large text data with a high repetition rate of substrings, but the structural data mainly stored in the database does not have this feature, so It is impossible to obtain a good compression effect; the second is that the encoding table needs to occupy a large amount of space. Taking Winzip as an example, even if a data containing only one byte is compresse

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