- enlarging string cols from 255 to more than 4000 fails on default
Oracle installations for invalid datatype conversion
Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>
Use a backup table to copy the data, drop table and recreate it with
correct primary key, then copy the data back and drop the backup table.
Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>