Does Mysql Store Max Size For Data Type Each Time, Or Only What Is Needed For Specific Data?
If I use MEDIUMTEXT, which (if I understand correctly) has a max size of 65k, does mysql use the entire size each time data is written to that column? I have a text field on my site that users fill in, but more often that not, they don't. However, when they do, it can be 1000 bytes or more. Am I wasting space using MEDIUMTEXT or does mysql only set aside 1000 bytes for that column if the data is only 1000 bytes?
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