In MySQL, once we use the COMPRESS method to compress a particular text, the LENGTH of the resultant text is not the same as that of the original text.
However, using UNCOMPRESSED_LENGTH method on the compressed text results in the exact length of the original text, even though the text is currently compressed.
Example:
SELECT UNCOMPRESSED_LENGTH(COMPRESS('MyName'))+-----------------------------------------+| UNCOMPRESSED_LENGTH(COMPRESS('MyName')) |+-----------------------------------------+| 6 | +-----------------------------------------+Now, use the below query
SELECT LENGTH(COMPRESS('MyName'))+----------------------------+| LENGTH(COMPRESS('MyName')) |+----------------------------+| 18 | +----------------------------+This indicates the different values in length using the two different LENGTH methods.
