http://www.perlmonks.org?node_id=1020566


in reply to Re: DBI:Sybase - Period in database name
in thread DBI:Sybase - Period in database name

This suggests to me that $dbh->quoted_identifier(..) should wrap things in brackets, not quotes, for DBD::Sybase, and so currently has a bug. Though there is also a syb_quoted_identifier atribute, which if set, should allow you to use quotes (though I've never used it). And I do now recall having to occasionally use brackets to quote some table/column names.