Re: [HACKERS] current- crash

> Michael Reifenberger wrote:
> >
> > Hi,
> > I can easily crash the backend of current- postgres on current- FreeBSD with
> > loading a database with test.sql and test.dmp an executing the script x.sql.
> > Anyone else?
> >
> > Bye!
> > ----
> > Michael Reifenberger
> > Plaut Software GmbH, R/3 Basis
> >
> > ------------------------------------------------------------------------
> > CREATE TABLE b (begt datetime, kid int4);
> > CREATE TABLE a (kid int4);
> > CREATE TABLE c (a int4, b varchar(30), c int4);
> > CREATE INDEX b_0 on b using btree ( begt datetime_ops );
> > CREATE INDEX b_1 on b using btree ( kid int4_ops );
> > CREATE INDEX a_0 on a using btree ( kid int4_ops );
> >
> > ------------------------------------------------------------------------
> > COPY b FROM stdin;
> > \.
> > COPY a FROM stdin;
> > \.
> > COPY c FROM stdin;
> > 1 foo 1
> > 2 foo bar 2
> > 3 \N 3
> > 4 \\serverla 4
> > \.
> >
> > ------------------------------------------------------------------------
> > explain SELECT a.kid as foo
> > FROM a, b WHERE
> > a.kid = b.kid AND
> > ( b.kid = 23 OR
> > b.kid = 36 );
>
>
> I tried your script but I can't see nothing wrong. :)
>
> CREATE TABLE b (begt datetime, kid int4);
> CREATE
> CREATE TABLE a (kid int4);
> CREATE
> CREATE TABLE c (a int4, b varchar(30), c int4);
> CREATE
> CREATE INDEX b_0 on b using btree ( begt datetime_ops );
> CREATE
> CREATE INDEX b_1 on b using btree ( kid int4_ops );
> CREATE
> CREATE INDEX a_0 on a using btree ( kid int4_ops );
> CREATE
>
> COPY b FROM stdin;
> COPY a FROM stdin;
>
> COPY c FROM stdin;
>
> select * from c;
> a|b |c
> -+---------+-
> 1|foo |1
> 2|foo bar |2
> 3| |3
> 4|\\servela|4
> (4 rows)
>
> explain SELECT a.kid as foo
> FROM a, b WHERE
> a.kid = b.kid AND
> ( b.kid = 23 OR
> b.kid = 36 );
> NOTICE: QUERY PLAN:
>
> Merge Join (cost=0.00 size=1 width=8)
> -> Seq Scan (cost=0.00 size=0 width=0)
> -> Sort (cost=0.00 size=0 width=0)
> -> Seq Scan on a (cost=0.00 size=0 width=4)
> -> Seq Scan (cost=0.00 size=0 width=0)
> -> Sort (cost=0.00 size=0 width=0)
> -> Seq Scan on b (cost=0.00 size=0 width=4)
>
> EXPLAIN

Perhaps because I fixed it two days ago.

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