The Ultimate Guide to High Availability with MariaDB

Comments - Generated (Virtual and Persistent/Stored) Columns

11 years, 2 months ago Alex Hermann
Expression limited to 252 characters

Too bad that an important limitation isn't mentioned: the expression is limited to 252 characters.

ERROR 1470 (HY000): String 'XXXXXXXXXX' is too long for VIRTUAL COLUMN EXPRESSION (should be no longer than 252)

I would have hoped to be able to use virtual columns for reducing complexity in multiple applications by containing the logic in the database. Unfortunately, even a simple CASE statement with a few options will quickly exceed the 252 character limit.

 
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