java.sql.SQLSyntaxErrorException: ORA-00933: SQL command not properly ended

/* Listar todas as reuniões do utilizador onde esteja convidado*/
                String sql = "SELECT M.ID, M.TITLE, M.DIA, M.HORA FROM MEETING AS M, MEETING_LIST AS ML WHERE (M.ID=ML.ID_MEETING AND ML.ID_UTILIZADOR=( SELECT ID FROM UTILIZADOR WHERE NOMEUTILIZADOR='"+ parcel.getUsername()+"' ) AND ML.STATUS=1 AND ML.INVITE=1)";
                toClient = new AbstractMessage(database.submitQuery(sql));