This attempts to insert a temporary entry into each enum table until it
succeeds. It re-synchronizes the postgres sequence generators with the max id
of the table.
Fixes#883 and #880
Most MySQL installs silently truncate indices at a specific number of bytes.
This value is 767 bytes unless either the innodb_large_prefix option is turned
on or the innodb_page_size has been changed. This change explicitly limits the
size of large indices to 767 characters due to the latin1 charset being 1 byte
per char.
