Re: bitmap scan cause core dump 8.1dev

On Sat, Aug 27, 2005 at 05:21:46PM +0400, Oleg Bartunov wrote:
> This query works as expected:
> # select name_qualified from place
> where fts_index @@ to_tsquery('moscow');
>
> This query (essentially the same as above) crashes:
> # select name_qualified from place, to_tsquery('moscow') as query
> where fts_index @@ query;
>
> When I disable bitmap scanning (set enable_bitmapscan=off)
> second query works fine.

Disabling enable_bitmapscan causes my example to succeed, but when
I do get the error I don't get a crash, and the same query without
EXPLAIN succeeds:

CREATE TABLE foo (x integer);
CREATE INDEX foo_x_idx ON foo (x);
CREATE VIEW fooview AS SELECT count(*) FROM foo WHERE x < 10;

SET enable_bitmapscan TO on;

SELECT * FROM fooview;
count
-------
0
(1 row)

EXPLAIN SELECT * FROM fooview;
ERROR: bogus varno: 5

SET enable_bitmapscan TO off;

EXPLAIN SELECT * FROM fooview;
QUERY PLAN
------------------------------------------------------------------------------
Aggregate (cost=32.41..32.41 rows=1 width=0)
-> Index Scan using foo_x_idx on foo (cost=0.00..30.63 rows=713 width=0)
Index Cond: (x < 10)
(3 rows)

--
Michael Fuhr