[wp-hackers] varchar(64) on transient names

[Haluk Karamete]

Schema says that it's got room for 64 chars.
But we are also advised to keep it at max of 45 chars
What takes up the 64-45?
$transient (*string*
<http://codex.wordpress.org/How_to_Pass_Tag_Parameters#String>) (*required*)
Transient name. Expected to not be SQL-escaped. Should be 45 characters or
less in length <http://core.trac.wordpress.org/ticket/15058>. @
http://codex.wordpress.org/Function_Reference/set_transient#Parameters