Charavay,
> ---------------------------------------------------------------------------
>-------- Hash Join (cost=6793.29..1716853.80 rows=33743101 width=11)
> Hash Cond: ("outer"."index" = "inner"."index")
> -> Seq Scan on lnk (cost=0.00..535920.00 rows=33743100 width=15)
> -> Hash (cost=4994.83..4994.83 rows=303783 width=4)
> -> Seq Scan dic (cost=0.00..4994.83 rows=303783 width=4)
> (5 rows)
According to the estimate, you are selecting all of the rows in the database.
This is going to require a Seq Scan no matter what.
--
--Josh
Josh Berkus
Aglio Database Solutions
San Francisco