subselects doesn't work in v7.0.3

jose (jose@sferacarta.com) reports a bug with a severity of 2
The lower the number the more severe it is.

Short Description
subselects doesn't work in v7.0.3

Long Description
Version: PostgreSQL 7.0.3 on i686-pc-linux-gnu, compiled by gcc 2.95.2

- I'm trying the following query in a table with 1973093 rows:

EXPLAIN select count(*)
   from marche
   where ristampa = 'S'
   and marca in
   (
   select marca from marche where ristampa is null and
   data_lotto between '1998/07/01' and '1999/01/31'
   );

NOTICE:  QUERY PLAN:
Aggregate  (cost=98854229180.08..98854229180.08 rows=1 width=4)
  ->  Seq Scan on marche  (cost=0.00..98854229130.75 rows=19731 width=4)
        SubPlan
          ->  Materialize  (cost=50101.13..50101.13 rows=6577 width=12)
                ->  Seq Scan on marche  (cost=0.00..50101.13 rows=6577 width=12)
EXPLAIN

- but it takes to many time: (after about 16 hours I interrupt the query)

verde:/var/lib/postgreSQL$ time psql interno < ./sql

Cancel request sent
ERROR:  Query was cancelled.
ERROR:  Query was cancelled.

real    954m44.582s
user    0m0.020s
sys     0m0.000s


- I tried the same query on DBMaker and it takes only about 1 minute.

dmSQL>
USE db #1 disconnected from db:<interno> by user:<sysadm>

real    1m10.070s
user    0m0.020s
sys     0m0.020s

- I tried the same query in a table with few rows and it
seems to work.



Sample Code


No file was uploaded with this report