I just returned from vacation and identified the problem.
We'll fix it.
Regards, Oleg
On Sun, 18 Mar 2001, Tom Lane wrote:
> I wrote:
> > I did this, also reinstalled the include-file changes I had made, and
> > then spent several fruitless hours trying to find why the "intbig" index
> > operators fail selftest here (on HP-PA). I suppose it's a portability
> > problem, since presumably they pass for Oleg ... but I don't see it.
>
> Further experimentation shows that intbig fails selftest on ALL
> platforms under 7.1. I see the problem: the intarray operators are
> mostly unprepared to cope with TOASTed input arrays. In particular,
> _intbig_union() generates an erroneous "null" result for a compressed
> input array, leading to completely incorrect GiST index trees in the
> self-test example.
>
> A somewhat-related error in this code is that some routines feel free
> to scribble on their input. This is tres uncool, because they may be
> scribbling on disk buffers. Example:
>
>
> regression=# create table foo(f1 int4[]);
> CREATE
> regression=# insert into foo values ('{10,1,2,1,4}');
> INSERT 150265 1
> regression=# select * from foo;
> f1
> --------------
> {10,1,2,1,4}
> (1 row)
>
> regression=# select * from foo where f1 && '{4}';
> f1
> --------------
> {1,1,2,4,10}
> (1 row)
>
> regression=# select * from foo;
> f1
> --------------
> {1,1,2,4,10}
> (1 row)
>
>
> And you thought SELECT was a read-only operation ...
>
> I do not have time to work on this stuff now, but as it stands the
> contrib/intarray code is unusable in 7.1. Unless Oleg can find the
> time to fix these issues before release, I will recommend that we
> not ship contrib/intarray in 7.1.
>
> regards, tom lane
>
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Regards, Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83
