Hello
I have two unrelated questions about fts function ts_rank:
1) I've created GiST index on column with fts vector, but query
SELECT * FROM table ORDER BY ts_rank(field, :query) LIMIT 20
is perfomed with sequential table scan. Index was created on field
column. Does it mean FTS indexes does no
Hello.
My application need to set advisory lock on UUID key, almost like it
does pg_advisory_xact_lock function. The problem is argument type of
this function - it consumes 8-byte value, not 16-byte.
I can not lock on any(hi, low or middle) 8-byte part of UUID, as far
as it can produce unexpected
ank does not use index
> because index does not store enough information for ranking:
> http://archives.postgresql.org/pgsql-general/2011-07/msg00351.php
>
> On Sat, Feb 18, 2012 at 12:39, Andrey Chursin wrote:
>>
>> Hello
>>
>> I have two unrelated questions ab
Hello
I have CURSOR for query SELECT a FROM table ORDER BY xyz, where table
a is extremely large and xyz is hard-to-evaluate, but indexable
expression(using gist).
As far as I understand, on
SELECT a FROM table ORDER BY xyz LIMIT X
query postgres do not fetch entire index or table, but it uses "n
