On Tue, 13 Nov 2001 21:27:12 -0500 (EST)
Vince Vielhaber <vev@michvhf.com> wrote:
> AFAIK the regress test database is working again. If anyone's having
> a problem with it let me know.
Hi, VinceNot a problem, but...I pondered whether the several examples, which is used nestedEXCEPT/INTERSECT/UNION among
threeSELECTs at the "Operator precedenceand (((((extra))))) parentheses" in the ../regress/sql/union.sql,have the case
likea query returning an incorrect result in v7.1.* (e.g. See below) or not. Finally, the reconfirmation may lead me
toconcludethat the examples can't reflect the behavior of the fixednested EXCEPT/INTERSECT(Thanks Tom). I wish there
wassomething newto be able to demonstrate the fixed.
SELECT q1 FROM int8_tblINTERSECT ALLSELECT q2 FROM int8_tblINTERSECTSELECT q2 FROM int8_tbl;
q1----- 123 <--NG(1 row)
SELECT q1 FROM int8_tblINTERSECTSELECT q2 FROM int8_tbl INTERSECTSELECT q2 FROM int8_tbl;
q1 ----- 123 <--NG(1 row)
SELECT q1 FROM int8_tbl INTERSECT ALLSELECT q2 FROM int8_tblEXCEPTSELECT q2 FROM int8_tbl WHERE q2 < 1000;
q1----(0 rows) <--NG
SELECT q1 FROM int8_tblINTERSECTSELECT q2 FROM int8_tblEXCEPT ALLSELECT q2 FROM int8_tbl WHERE q2 < 1000;
q1----(0 rows) <--NG
TIA,Masaru Sugawara
