bug in 9.2.2 ? subquery accepts wrong column name : upd

dynacom=# SELECT DISTINCT ON (qry.setid) qry.setid, qry.arragg[1:2] FROM
(select distinct sst.setid,(array_agg(vsl.name) OVER (PARTITION BY sst.setid ORDER BY character_length(vsl.name))) as arragg
FROM sissets sst, vessels vsl WHERE vsl.id=sst.vslid ORDER BY sst.setid) as qry
WHERE array_length(qry.arragg,1)>1 AND qry.setid IN (SELECT setid from sis_oper_cons) ORDER BY qry.setid,array_length(qry.arragg,1);
setid | arragg
-------+----------------------------------
54 | {EQUZZZ,SAMZZZ}
55 | {"ZZZR","ZZZTRAVEL"}
81 | {"ZZZ SISTER","ZZZ DUMMY II"}
(3 rows)

however, there is not column setid in sis_oper_cons,

dynacom=# SELECT setid from sis_oper_cons;
ERROR: column "setid" does not exist
LINE 1: SELECT setid from sis_oper_cons;
^
9.2.2 Postgresql treats qry.setid IN (SELECT setid from sis_oper_cons) as true.
However, making subquery look like (SELECT soc.setid from sis_oper_cons soc), as in

dynacom=# SELECT DISTINCT ON (qry.setid) qry.setid, qry.arragg[1:2] FROM (select distinct sst.setid,(array_agg(vsl.name) OVER (PARTITION BY sst.setid ORDER BY character_length(vsl.name))) as arragg FROM sissets sst, vessels vsl WHERE vsl.id=sst.vslid ORDER BY sst.setid) as qry WHERE array_length(qry.arragg,1)>1 AND qry.setid NOT IN (SELECT soc.setid from sis_oper_cons soc) ORDER BY qry.setid,array_length(qry.arragg,1);
ERROR: column soc.setid does not exist
LINE 1: ...gth(qry.arragg,1)>1 AND qry.setid NOT IN (SELECT soc.setid ...
^
dynacom=#

postgresql corerctly identifies and throws the error.

-
Achilleas Mantzios
IT DEV
IT DEPT
Dynacom Tankers Mgmt