PLS-00358:error (Rel. 8.1.7.2.0) but in Rel. 9.2.0.5.0 it works f

Question

Hello everybody!
This is the version:
Oracle8i Enterprise Edition Release 8.1.7.2.0 - Production
PL/SQL Release 8.1.7.2.0 - Production
and this is the code:
DECLARE
tab_idlocation PKG_TEATRI_VOD.tab_num;
tab_idEvento PKG_TEATRI_VOD.tab_num;
tab_Evento PKG_TEATRI_VOD.tab_appevento_titolo;
tab_nomelocation PKG_TEATRI_VOD.tab_applocation;
tab_dataprima PKG_TEATRI_VOD.tab_app_prima_ultima;
tab_dataUltima PKG_TEATRI_VOD.tab_app_prima_ultima;
BEGIN
select c.id_evento, b.evento, to_char(c.prima, 'dd/mm/yyyy'),to_char(c.ultima, 'dd/mm/yyyy'),
a.id_location, location
bulk collect into tab_IdEvento, tab_Evento, tab_dataPrima , tab_dataUltima, tab_IdLocation, tab_nomelocation
from
( select id_location, location from location where upper(citta) = 'MILANO' ) a,
( select /*+ index( evento SETTORE_EVENTO_FK) */ distinct evento,id_location from evento
where ( trunc(sysdate) between prima and ultima or prima >= trunc(sysdate) )
and id_settore = 3 and ( lower(evento) like '%'||''||'%' or lower(evento)like '%'||' '||''||'%' or '' is null )
and ( id_location = '' or '' is null ) ) b,
( select min(id_evento) id_evento ,min(prima) prima ,max(ultima) ultima , evento, id_location from evento
where ( trunc(sysdate) between prima and ultima or prima >= trunc(sysdate) ) and id_settore = 3
group by evento, id_location ) c
where a.id_location = b.id_location
and b.id_location= c.id_location
and c.evento = b.evento
order by evento; -- line 24
END;
ERROR at line 24:
ORA-06550: line 24, column 10:
PLS-00358: column 'EVENTO' exists in more than one table; use qualifier
ORA-06550: line 9, column 1:
PL/SQL: SQL Statement ignored
But in release
Oracle9i Enterprise Edition Release 9.2.0.5.0 - Production
PL/SQL Release 9.2.0.5.0 - Production
It works fine. Why?
Thanks,
Antonio

Answer 1

Hi Samujjwal .....
DELETE abc
WHERE num_col = 1
AND (num_col,ROWNUM) IN ( SELECT num_col
                               , r_num
                            FROM ( SELECT num_col
                                        , ROWNUM r_num
                                     FROM abc
                                    WHERE num_col = 1
                          MINUS
                          SELECT num_col
                               , r_num
                            FROM ( SELECT num_col
                                        , MAX(r_num) r_num
                                     FROM ( SELECT num_col
                                                 , ROWNUM r_num
                                              FROM abc
                                             WHERE num_col = 1
                                   GROUP BY num_col
                          )Wow! That's quite a query!
I agree with Bradd - I think the problem is that the ORACLE psuedo-column ROWNUM cannot be relied upon for use in such WHERE clauses. It's really just a row counter for the returned result set from a query or sub-query. Oracle will return a result set ordered in any way it cares to - unless you direct to do otherwise.
Did you get the same result when you ran the query with ROWID ?