Date: Wed, 21 Jul 2010 12:38:55 +0800
From: cr...@postnewspapers.com.au
To: prometheus...@hotmail.com
CC: pgsql-general@postgresql.org
Subject: Re: [GENERAL] what do i need to know about array index?
On 20/07/10 18:27, Prometheus Prometheus wrote:
What's with the pseudonym?
nothing
On 21/07/10 15:08, Prometheus Prometheus wrote:
head - wall
That's about how I feel about SQL NULLs in general.
They seem like a great idea. A way of representing unknown or
undefined in a generic, consistent manner.
Or is that a definite value that means empty or absent ? Depends on
who you
Suppose 1=Red, 2=Yellow, 4=Green and 8=Orange.
Now suppose the following data structures and rows exist:
create table coloursample (recid integer, colour integer, descript varchar);
insert into coloursample values (1,2,'Yellow only');
insert into coloursample values (2,10,'Yellow and Orange');
Hi,
I'm testing the system with these two insert commands:
1) this command returns an empty result set:
insert into support.master (a) VALUES (2) RETURNING seq;
2) this command returns correctly the seq (serial) value into result
set:
insert into support.partitionB (a) VALUES (2) RETURNING seq;
On Tue, Jul 20, 2010 at 9:59 PM, Howard Rogers h...@diznix.com wrote:
Suppose 1=Red, 2=Yellow, 4=Green and 8=Orange.
Now suppose the following data structures and rows exist:
create table coloursample (recid integer, colour integer, descript varchar);
insert into coloursample values
hi,
On Jul 21, 2010, at 10:02, pdov...@tiscali.it pdov...@tiscali.it
wrote:
Hi,
I'm testing the system with these two insert commands:
1) this command returns an empty result set:
insert into support.master (a) VALUES (2) RETURNING seq;
2) this command returns correctly the seq (serial)
Howard Rogers wrote:
insert into coloursample values (2,10,'Yellow and Orange');
But how do I find records which are ONLY yellow and orange
what about
select * from coloursample where colour = 10;
regards,
Yeb Havinga
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On 21 July 2010 09:17, Jan Otto as...@me.com wrote:
hi,
On Jul 21, 2010, at 10:02, pdov...@tiscali.it pdov...@tiscali.it wrote:
Hi,
I'm testing the system with these two insert commands:
1) this command returns an empty result set:
insert into support.master (a) VALUES (2) RETURNING seq;
On 7/20/2010 11:59 PM, Howard Rogers wrote:
But how do I find records which are ONLY yellow and orange, and
exclude records which have some other colour mixed in, in one simple
query without a lot of 'not this, not that' additions, and without
using multiple separate AND tests to nail it down?
Hi Jan,
Messaggio originale
Da: as...@me.com
Data: 21/07/2010 10.17
A: pdov...@tiscali.itpdov...@tiscali.it
Cc: pgsql-general@postgresql.orgpgsql-general@postgresql.org
Ogg: Re: [GENERAL] INSERT RETURNING and partitioning
hi,
On Jul 21, 2010, at 10:02, pdov...@tiscali.it
Hi Tom
Messaggio originale
Da: thombr...@gmail.com
Data: 21/07/2010 10.38
A: Jan Ottoas...@me.com
Cc: pdov...@tiscali.itpdov...@tiscali.it, pgsql-
gene...@postgresql.orgpgsql-general@postgresql.org
Ogg: Re: [GENERAL] INSERT RETURNING and partitioning
On 21 July 2010 09:17, Jan Otto
On 21 Jul 2010, at 11:35, pdov...@tiscali.it wrote:
Yes, Jan's right. You're effectively overriding the return values
with NULL.
Although I think I know why you're doing it, because you want to
redirect the value to the child table so that it doesn't get inserted
into the parent table as
Hi,
when I have an Oracle spatial database, I can easily convert it to
PostgreSQL database, using handwritten tool, or just dumping it to a shape
file and loading to the PostGis database. Do you know any simple way for
(semi)automatical conversion of the spatial queries from Oracle to PostGis?
I
Hi all
I prefer doing pg_dump - psql restore to vacuum full and
is there anyone know whether postgresql can insert data concurrently while
restoring a table for not losing any data.
thanks in advance...
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On 21/07/10 19:26, paladine wrote:
Hi all
I prefer doing pg_dump - psql restore to vacuum full and
is there anyone know whether postgresql can insert data concurrently while
restoring a table for not losing any data.
There's no particular reason why you can't just feed a data-only dump
I have a linux daemon that parses some datas and writes to db continuously
but my db is growing unexpectedly so I must reduce disk space once a week.
vacuum full is one solution but pg_dump-restore gives back more space to OS.
I wrote a script like this
# pg_dump db asd.sql (1)
# dropdb db
We need to locate all cities within a certain distance of a single city.
We have longitude and latitude data for all cities. I was thinking
postGIS was a viable solution, but I don't see a way to use our existing
data via postGIS.
Is postGIS a viable solution, or should I be looking at a
On Mon, Jul 19, 2010 at 8:14 PM, vinicius_bra vinicius...@yahoo.com.br wrote:
Hi All,
I'm developing a system in C and I have a unsigned char pointer that
represents a struct and I like to store it in a bytea column in postgreSQL.
How can I do it?
Example:
you have several options:
*)
take Oracle Spatial SDO_FILTER Functio
Uses the spatial index to identify either the set of spatial objects that are
likely to interact spatially with a given object
Format: SDO_FILTER(geometry1, geometry2, params);
http://download.oracle.com/docs/html/A85337_01/sdo_oper.htm#76214
Hi,
Has there been any progress on nested transactions in the last 10 years?
I am in a situation where I have a script that executes a number of
functions that build and populate a database including a rather large
lookup table (80GB) along with a number of large indexes (10GB).
I am trying
On 7/21/2010 8:01 AM, Geoffrey wrote:
We need to locate all cities within a certain distance of a single city.
We have longitude and latitude data for all cities. I was thinking
postGIS was a viable solution, but I don't see a way to use our existing
data via postGIS.
Is postGIS a viable
On 21 July 2010 10:43, Robot Tom robotwil...@googlemail.com wrote:
Hi,
Has there been any progress on nested transactions in the last 10 years?
PostgreSQL has had subtransactions since version 8.0, if that's what
you mean. If you're experiencing OOM a lot, a high work_mem setting is
often the
On 07/21/2010 06:01 AM, Geoffrey wrote:
We need to locate all cities within a certain distance of a single city.
We have longitude and latitude data for all cities. I was thinking
postGIS was a viable solution, but I don't see a way to use our existing
data via postGIS.
Is postGIS a
Is there any difference between text and varchar data types? (Not
varchar(n), just varchar.) I can't see a different from the manual page, but
I'm wondering about index usage or something similarly subtle.
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To make changes to
On Wed, 2010-07-21 at 08:58 -0700, Ben Chobot wrote:
Is there any difference between text and varchar data types? (Not
varchar(n), just varchar.) I can't see a different from the manual page, but
I'm wondering about index usage or something similarly subtle.
They are the same thing. So is
varchar allows you to define an explicit length of the field, text does not.
varchar with a length specified (varchar(n)) is sql92 compliant while
varchar() and text are pgsql extensions.
On 2010-07-21 08:58:54AM -0700, Ben Chobot wrote:
Is there any difference between text and varchar data
On 21 July 2010 16:58, Ben Chobot be...@silentmedia.com wrote:
Is there any difference between text and varchar data types? (Not
varchar(n), just varchar.) I can't see a different from the manual page, but
I'm wondering about index usage or something similarly subtle.
--
Here's what Tom
On Jul 21, 2010, at 9:05 AM, Thom Brown wrote:
On 21 July 2010 16:58, Ben Chobot be...@silentmedia.com wrote:
Is there any difference between text and varchar data types? (Not
varchar(n), just varchar.) I can't see a different from the manual page, but
I'm wondering about index usage or
Once PostGIS is installed you can do it with a single SQL query looking like
this:
SELECT dest.id, ST_Distance(ST_MakePoint(orig.longitude, orig.latitude),
ST_MakePoint(dest.longitude, dest.latitude))
FROM yourcitytable orig, yourcitytable dest
WHERE ST_DWithin(ST_MakePoint(orig.longitude,
yasinma...@gmail.com (paladine) writes:
Hi all
I prefer doing pg_dump - psql restore to vacuum full and
is there anyone know whether postgresql can insert data concurrently while
restoring a table for not losing any data.
thanks in advance...
The problem scenario that I'd expect is with
create table cities (
geog geography,
name varchar,
id integer primary key
);
insert into cities
select
Geography(ST_SetSRID(ST_MakePoint(lon, lat),4326)) as geog,
name, id
from mytable;
create index cities_gix on cities using gist ( geog );
select st_distance(a.geog, b.geog),
Hum right... Better follow Paul instructions. We are in geographic coordinates
here... Sorry. This would work in a limited projected space.
-Original Message-
From: pgsql-general-ow...@postgresql.org
[mailto:pgsql-general-ow...@postgresql.org] On Behalf Of
Pierre Racine
Sent: 21 juillet
On Wed, Jul 21, 2010 at 9:17 PM, Mathieu De Zutter math...@dezutter.org wrote:
On Wed, Jul 21, 2010 at 5:59 AM, Howard Rogers h...@diznix.com wrote:
It's also easy to find records which have either some yellow or some
orange (or both) in them:
select * from coloursample where colour 100;
On 21/07/10 20:21, paladine wrote:
I have a linux daemon that parses some datas and writes to db continuously
but my db is growing unexpectedly so I must reduce disk space once a week.
I assume you're also deleting from the database, given that its growth
is a problem.
It sounds like you
On Wed, Jul 21, 2010 at 4:41 AM, Howard Rogers h...@diznix.com wrote:
On Wed, Jul 21, 2010 at 6:08 PM, Scott Marlowe scott.marl...@gmail.com
wrote:
On Tue, Jul 20, 2010 at 9:59 PM, Howard Rogers h...@diznix.com wrote:
Suppose 1=Red, 2=Yellow, 4=Green and 8=Orange.
Now suppose the following
On Wed, Jul 21, 2010 at 9:02 PM, Scott Marlowe scott.marl...@gmail.com wrote:
If the fifth bit means one thing, and the 7th bit means something
else, quick which of the following have the fifth bit set and the 7th
bit off:
That should be fifth bit off and 7th bit on up there ^^^
01001101
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