Strange behaviuor (bug?) with view (ora-918 column ambiguously defined)

Question

Hallo everybody,
the following code works as expected;
select substr(fire_id,-4,2) as ct,zone_id, count(fire_id),sum(a_total) from
(select *
from fire right join fire_zone using (fire_id)
where definition_id = 1
and checked = 1
and substr(fire_id,-4,2) in (21,23)
and fire_id between 190400000000 and 200900000000)
group by substr(fire_id,-4,2),zone_id
order by ct, zone_id
but when a define a view for the subquery:
create or replace view tempfire as
select *
from fire right join fire_zone using (fire_id)
where definition_id = 1
and checked = 1
and substr(fire_id,-4,2) in (21,23)
and fire_id between 190400000000 and 200900000000
and then run
select substr(fire_id,-4,2) as ct,zone_id, count(fire_id),sum(a_total) from tempfire
group by substr(fire_id,-4,2),zone_id
order by ct, zone_id
I got the error ora-00918 column ambiguously defined for zone_id.
Is this a bug or is there a reason?
Thank you in advance,
Cheers,
Boris
Edited by: boris on Nov 19, 2009 6:49 AM
Edited by: boris on Nov 19, 2009 6:52 AM

Answer 1

user503699
I followed your suggestion and now it works. Thank you !
But something is strange ... this is the result of the desc tempfire ... and all the column names are different ...
desc tempfire
Name Null Type
FIRE_ID NOT NULL NUMBER(12)
START_DATE DATE
END_DATE DATE
LOCALITY VARCHAR2(56)
X_COORD NUMBER(6)
Y_COORD NUMBER(6)
COORD_RELIABILITY_ID NUMBER(1)
ALTITUDE NUMBER(4)
SITE_ID NUMBER(1)
EXPO_ID NUMBER(1)
SLOPE NUMBER(3)
X_BUSH NUMBER(1)
X_COPPICE NUMBER(1)
X_COPPICE_MIXED NUMBER(1)
X_SELVA NUMBER(1)
X_HIGH_FOREST_HARDWOOD NUMBER(1)
X_HIGH_FOREST_SOFTWOOD NUMBER(1)
X_HIGH_FOREST_MIXED NUMBER(1)
X_PIONEER NUMBER(1)
X_FORESTATION NUMBER(1)
S_BUSH NUMBER(8,2)
S_COPPICE NUMBER(8,2)
S_COPPICE_MIXED NUMBER(8,2)
S_SELVA NUMBER(8,2)
S_HIGH_FOREST_HARDWOOD NUMBER(8,2)
S_HIGH_FOREST_SOFTWOOD NUMBER(8,2)
S_HIGH_FOREST_MIXED NUMBER(8,2)
S_PIONEER NUMBER(8,2)
S_FORESTATION NUMBER(8,2)
A_FOREST NUMBER(8,2)
A_GRASSLAND NUMBER(8,2)
A_NONPRODUCTIVE NUMBER(8,2)
A_TOTAL NUMBER(8,2)
D_CASTANEA NUMBER(1)
D_QUERCUS NUMBER(1)
D_FAGUS NUMBER(1)
D_BETULA NUMBER(1)
D_OTHER_HARDWOOD NUMBER(1)
D_PINUS NUMBER(1)
D_PICEA NUMBER(1)
D_LARIX NUMBER(1)
D_OTHER_SOFTWOOD NUMBER(1)
DIAMETER NUMBER(3)
LITTER_ID NUMBER(1)
HERB_LAYER_ID NUMBER(1)
BUSH_LAYER_ID NUMBER(1)
FIRE_SURFACE NUMBER(1)
FIRE_CROWN NUMBER(1)
FIRE_SINGLE_TREE NUMBER(1)
FIRE_SUBSURFACE NUMBER(1)
DAMAGE_FOREST_ID NUMBER(1)
DAMAGE_SOIL_ID NUMBER(1)
HEIGHT_DAMAGE NUMBER(4,2)
F_PROTECTION NUMBER(1)
F_ECONOMIC NUMBER(1)
F_RECREATION NUMBER(1)
CAUSE_ID NUMBER(2)
OTHER_CAUSE VARCHAR2(200)
CAUSE_RELIABILITY_ID NUMBER(1)
ALARM_FORESTDEP DATE
CHECKED NUMBER(1)
DATA_FROM_FORESTDEP NUMBER(1)
DATA_FROM_FIREMANDEP NUMBER(1)
DATA_FROM_HISTORY NUMBER(1)
INSERT_DATE DATE
INSERT_BY VARCHAR2(16)
UPDATE_DATE DATE
UPDATE_BY VARCHAR2(16)
OLD_TI_AFFDFO VARCHAR2(1)
OLD_TI_S_SPES NUMBER(8,2)
OLD_TI_PICFOR VARCHAR2(1)
OLD_TI_FIRE_TYPE VARCHAR2(1)
OLD_TI_DOMINANT_SPECIES VARCHAR2(1)
OLD_TI_CAUSE VARCHAR2(2)
OLD_TI_FOREST_TYPE VARCHAR2(1)
START_DATE_RELIABILITY_ID NUMBER(1)
END_DATE_RELIABILITY_ID NUMBER(1)
DEFINITION_ID NUMBER(1)
ZONE_ID NOT NULL NUMBER(8)
79 rows selected
I'm still interested hoe to use hints. Can anybody tell me?
Thank you
Boris