Possible consequences of increasing varchar length in MySql?

legacy-code, mysql, varchar

Solution

Increasing should typically not cause issues, it is the decreasing that can cause problems.

Problem

I'm using an old table, which has a varchar(40) field in it. I want it to be possible to insert more characters in that field, so I want to increase the length of it. Are there possible negative consequences I should think of before increasing the length?

Original source

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