[Koha-bugs] [Bug 18336] Use utf8mb4 instead of utf8 for MySQL tables, columns, and connections

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=18336 --- Comment #69 from Victor Grousset/tuxayo <victor.grousset@biblibre.com> --- (In reply to M. Tompsett from comment #10)

A lot of fields are shrunk from 255 to 191. This is because index size for VARCHAR on InnoDB has a max size, in bytes, of 767 bytes (or similar) and utf8 uses 3 bytes for each char, and utf8mb4, 4. 767/3 > 255. but 767/4 > 191. https://dev.mysql.com/doc/refman/5.5/en/charset-unicode-conversion.html

Gain functionality (necessary for true unicode), lose space (not an issue yet).

So, isn't there a loss of data on VARCHAR ? I didn't see VARCHAR being converted to something else. -- You are receiving this mail because: You are watching all bug changes.