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MYSQL

UNCOMPRESS()


Description

The UNCOMPRESS( ) function un-compresses a string, which is compressed by the COMPRESS() function. The result will be NULL, if the argument is not a compressed value. This function requires a MySQL to be compiled with a compression library like zlib. Else, the return value is always NULL.

This function has the form:

SELECT UNCOMPRESS(string_to_uncompress)
Parameter Description
string_to_uncompress Any string

Return Value

Always NULL, if the function is compiled with a compression library.

Examples

The following example shows the basic use of this function:

mysql> SELECT UNCOMPRESS(COMPRESS('any string'));
-> 'any string'
mysql> SELECT UNCOMPRESS('any string');
-> NULL


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