Douglas Alan writes:
> Hey, while I have you on the line, might you be so kind as to explain why
> this query is so slow? Shouldn't it just fetch the first row in the table?
>
> explain analyze select * from maindb_astobject limit 1;
Yeah ...
>> QUERY
>> PLAN
>>
>>
Douglas Alan escribió:
> Hey, while I have you on the line, might you be so kind as to explain why
> this query is so slow? Shouldn't it just fetch the first row in the table?
> What could be faster than that?
>
> explain analyze select * from maindb_astobject limit 1;
> >
> >
On Tue, Jun 2, 2009 at 9:52 AM, Tom Lane wrote:
>
> delete from pg_statistic
> where (starelid, staattnum) in
> (select attrelid, attnum from pg_attribute
> where attrelid = 'my_relation'::regclass and attname = 'my_attribute');
>
> regclass knows about schemas and search paths, so stuff like
Douglas Alan writes:
> delete from pg_statistic s
> where exists ( select 1
> from pg_class as c, pg_attribute as a
> where a.attrelid = c.relfilenode
> and s.starelid = c.relfilenode
> and s.staattnum = a.attnum
> and c.relname = 'maindb_astobject'
> and attname = 'survey_id'
> );
Use c.oid, not
On Mon, Jun 1, 2009 at 8:20 PM, Douglas Alan wrote:
> I'd like to manually alter the statistics for a column, as for the column in
> question the statistics are causing Postgres to do the wrong thing for my
> purposes. (I.e., a Seq Scan, rather than an Index Scan.) If someone can
> tell me how to
If you want something done right, I guess you have to do it yourself!
Here's the answer to my question. It works great! Or so it seems to:
delete from pg_statistic s
where exists ( select 1
from pg_class as c, pg_attribute as a
where a.attrelid = c.relfilenode
and s.starelid = c.relfilenode
and
I'd like to manually alter the statistics for a column, as for the column in
question the statistics are causing Postgres to do the wrong thing for my
purposes. (I.e., a Seq Scan, rather than an Index Scan.) If someone can
tell me how to achieve this, I would quite grateful.
Thanks!
|>ouglas
P.
