Oleg Broytmann wrote:
>
> I played with the query, and found I can remove (AND d.city_id = 2). The
> query executes pretty fast (my database is small). I tried to get
> d.city_id:
>
> SELECT p.subsec_id, d.city_id
> FROM positions p, central cn, shops sh, districts d
> WHERE cn.pos_id = p.pos_id
> AND cn.shop_id = sh.shop_id AND sh.distr_id = d.distr_id
> AND cn.date_i >= current_date - '7 days'::timespan
>
> but postgres eats all memory and dies :(((
What does EXPLAIN say ?
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Hannu