Are cross-database transactions supported for Innodb and/or ExtraDB with Percona and/or MySQL?
I am not asking about cross-server or cluster, just a simple single host with multiple databases. I would expect transactions to be supported across database since the meta data files are shared. When I test it seems to be ok with MySQL and InnoDB at least i.e. locks are held until the end of the transaction and rollback seems to work.
But can anyone give me definitive answers?
I cannot find anything in any documentation or any authoritative responses in StackOverFlow etc.