From: | Robert Berger <rwb(at)vtiscan(dot)com> |
---|---|
To: | hubert depesz lubaczewski <depesz(at)depesz(dot)pl> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: int8 indices? |
Date: | 2001-08-07 15:50:08 |
Message-ID: | 3B700E31.604E9135@vtiscan.com |
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Thread: | |
Lists: | pgsql-general |
I got burned by this recently and found the answer on the net:
When selecting on a column with an INT8 index, alway put
quotes around the constant value:
select * from a where id = '6970';
Otherwise the constant is assumed to be an INT4, which doesn't match the
type in the index, so the index is not used.
> of course i vacuum'ed, but when i select anything from the table i get
> seqscan:
> depesz=# explain select * from a where id = 6970;
> NOTICE: QUERY PLAN:
>
> Seq Scan on a (cost=0.00..465.76 rows=1 width=8)
>
> EXPLAIN
>
> what could be possible reason?
>
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