Re: WITH RECURSIVE patch V0.1 - Mailing list pgsql-patches

From Gregory Stark
Subject Re: WITH RECURSIVE patch V0.1
Date
Msg-id 87lk26q34h.fsf@oxford.xeocode.com
Whole thread Raw
In response to Re: WITH RECURSIVE patch V0.1  (David Fetter <david@fetter.org>)
List pgsql-patches
"David Fetter" <david@fetter.org> writes:

> On Mon, May 19, 2008 at 12:21:20AM -0400, Gregory Stark wrote:
>> "Zoltan Boszormenyi" <zb@cybertec.at> writes:
>> > Also, it seems there are no infinite recursion detection:
>> >
>> > # with recursive x(level, parent, child) as (
>> >    select 1::integer, * from test_connect_by where parent is null
>> >    union all
>> >    select x.level + 1, base.* from test_connect_by as base, x where base.child
>> > = x.child
>> > ) select * from x;
>> > ... it waits and waits and waits ...
>>
>> Well, psql might wait and wait but it's actually receiving rows.  A
>> cleverer client should be able to deal with infinite streams of
>> records.
>
> That would be a very good thing for libpq (and its descendants) to
> have :)

I think you can do it in libpq.

In psql you can use \set FETCH_COUNT or somrthing like this (I can't look it
up just now) to use a cursor to do this too.


--
  Gregory Stark
  EnterpriseDB          http://www.enterprisedb.com
  Ask me about EnterpriseDB's 24x7 Postgres support!

pgsql-patches by date:

Previous
From: David Fetter
Date:
Subject: Re: WITH RECURSIVE patch V0.1
Next
From: Gregory Stark
Date:
Subject: Re: WITH RECURSIVE patch V0.1