Re: Searching GIN-index (FTS) and sort by timestamp-column

From: Andreas Joseph Krogh
Subject: Re: Searching GIN-index (FTS) and sort by timestamp-column
Date: ,
Msg-id: VisenaEmail.59.14f5e83b9780ba86.1537ff78701@tc7-visena
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In response to: Re: Searching GIN-index (FTS) and sort by timestamp-column  (Evgeniy Shishkin)
List: pgsql-performance

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Searching GIN-index (FTS) and sort by timestamp-column  (Andreas Joseph Krogh, )
 Re: Searching GIN-index (FTS) and sort by timestamp-column  (Tom Lane, )
  Re: Searching GIN-index (FTS) and sort by timestamp-column  (Andreas Joseph Krogh, )
   Re: Searching GIN-index (FTS) and sort by timestamp-column  (Andreas Joseph Krogh, )
   Re: Searching GIN-index (FTS) and sort by timestamp-column  (Jeff Janes, )
    Re: Searching GIN-index (FTS) and sort by timestamp-column  (Andreas Joseph Krogh, )
     Re: Searching GIN-index (FTS) and sort by timestamp-column  (Oleg Bartunov, )
      Re: Searching GIN-index (FTS) and sort by timestamp-column  (Andreas Joseph Krogh, )
    Re: Searching GIN-index (FTS) and sort by timestamp-column  (Oleg Bartunov, )
     Re: Searching GIN-index (FTS) and sort by timestamp-column  (Jeff Janes, )
  Re: Searching GIN-index (FTS) and sort by timestamp-column  (Evgeniy Shishkin, )
   Re: Searching GIN-index (FTS) and sort by timestamp-column  (Evgeniy Shishkin, )
    Re: Searching GIN-index (FTS) and sort by timestamp-column  (Evgeniy Shishkin, )
     Re: Searching GIN-index (FTS) and sort by timestamp-column  (Andreas Joseph Krogh, )
     Re: Searching GIN-index (FTS) and sort by timestamp-column  (Tom Lane, )
      Re: Searching GIN-index (FTS) and sort by timestamp-column  (Andreas Joseph Krogh, )
       Re: Searching GIN-index (FTS) and sort by timestamp-column  (Tom Lane, )
    Re: Searching GIN-index (FTS) and sort by timestamp-column  (Andreas Joseph Krogh, )

På onsdag 16. mars 2016 kl. 16:04:08, skrev Evgeniy Shishkin <>:

> On 16 Mar 2016, at 17:52, Evgeniy Shishkin <> wrote:
>
>
>> On 16 Mar 2016, at 16:37, Tom Lane <> wrote:
>>
>> Andreas Joseph Krogh <> writes:
>>> 1. Why isnt' folder_id part of the index-cond?
>>
>> Because a GIN index is useless for sorting.
>
> I don't see how gin inability to return sorted data relates to index condition.
> In fact i tried to reproduce the example,
> and if i change folder_id to int from bigint, then index condition with folder_id is used
>
>         Index Cond: ((fts_all @@ '''hi'''::tsquery) AND (folder_id = 1))
>

Looks like documentation http://www.postgresql.org/docs/9.5/static/btree-gin.html
is lying about supporting int8 type
 
Hm, interesting!
 
@Tom: Any idea why BIGINT doesn't work, but INTEGER does?
 
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Andreas Joseph Krogh
CTO / Partner - Visena AS
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