accessing
1 page in postgres may require reading 2 distant
blocks!
According to my understanding of how file system
works, a file system block is the unit of exchange
between the hard disk and the main memory.
am i missing something ??
--- Richard Huxton [EMAIL PROTECTED] wrote:
Najib Abi Fadel
Dear all,
i was reading the postgres docs concerning the
Database Physical Storage. I found that the
information present there is not enough to satisfy my
curiosity.
Are there any documentation out there that describes
in more details the Database Physical Storage of
potgres ?
In the Page
Hi,
i migrated my database from postgres 7.3 to postgres
8.1.
I was wondering if there is a way to verify that data
has been well copied betweeen the 2 versions !
I thought about writing a script that will verify that
we have the same tables and the same number of lines
per table between the 2
Hi,i need to move my postgres users with their passwords from one postgres version (7.3) to a newer one (8.1) . Is there an automatic way to do that without having to recreate the users with their passwords ??Thanks for any helpNajib.
when u connect to the database type:\h GRANTand you will get all the Grant options:GRANT { { CREATE | TEMPORARY | TEMP } [,...] | ALL [ PRIVILEGES ] } ON DATABASE dbname [, ...] TO { username | GROUP groupname | PUBLIC } [, ...] [ WITH GRANT OPTION ]This will grant the privileges on all tables
for PostgreSQL, Postgresql, postgresql u can use ilike:example: select * from table where name ilike 'postgresql'U can even try:select * from table where name ilike '%postgresql%'the '%' is for any set of caracters (like * when u are doing a shell commande)For the others (bostgresql, posdgresql,
m. Good luck. On 9/21/06, Najib Abi Fadel <[EMAIL PROTECTED]> wrote: Hi again, How can i use connection pooling ? Should i use a software like PGPool ? Will the connection pooling boost considerably the performance ? Leonel adviced me to use persistent connections ? hos do i use that ?
] wrote: You should also consider using connection pooling inorder to attain better performance. Regards Talha Khan On 9/20/06, Najib Abi Fadel [EMAIL PROTECTED] wrote: I
have a web application that is accessed by a large number of users. My application is written in PHP and uses postgres. Apache
Hi,i have an already running web application with a lot of users. All the connections to the postgresql database are not persistent. I was wondering if it is possible to switch to persistent connection without having problems in my current in production application in order to boost performance
, then someone could give you a better answer!Regards,Ben"Najib Abi Fadel" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]Robin Ericsson <[EMAIL PROTECTED]> wrote:On 9/18/06, Najib Abi Fadel wrote: Hi, i was searching for a load balancing solution for postgres, I found some
, then someone could give you a better answer!Regards,Ben"Najib Abi Fadel" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]Robin Ericsson <[EMAIL PROTECTED]> wrote:On 9/18/06, Najib Abi Fadel wrote: Hi, i was searching for a load balancing solution for postgres, I found some
Robin Ericsson [EMAIL PROTECTED] wrote: On 9/18/06, Najib Abi Fadel <[EMAIL PROTECTED]> wrote: Hi, i was searching for a load balancing solution for postgres, I found some ready to use software like PGCluster, Slony, pgpool and others. It would really be nice if someone knows which one is th
for any help.
Najib Abi Fadel
System Administrator
Saint-Joseph University
__
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Hi,i was searching for a load balancing solution for postgres, I found some ready to use software like PGCluster, Slony, pgpool and others.It would really be nice if someone knows which one is the best taking in consideration that i have an already running application that i need to load balance.I
Hi
i don't see any practical use of _javascript_ with
Postgresql, since a _javascript_ is on the client side.
Unless you want each client machine to have its own
database !
Najib.
- Original Message -
From:
[EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Hi Nageshwar try this command i think it's what you
need.
psql -t -dDataBaseName -c "select tablename
from pg_tables where schemaname='theSchemaName' " | xargs -i psql -t -d
DataBaseName -c "grant select on {} to nabifadel"
Najib.
Programmer at Saint-Joseph University
Lebanon
-
Is there a to get the row creation time if we know
it's object ID ??
Thx
Message -
From: Michael Glaesemann [EMAIL PROTECTED]
To: Najib Abi Fadel [EMAIL PROTECTED]
Cc: generalpost [EMAIL PROTECTED]
Sent: Wednesday, November 24, 2004 12:40 PM
Subject: Re: [GENERAL] Row creation time
On Nov 24, 2004, at 7:07 PM, Najib Abi Fadel wrote:
Is there a to get the row
You can replace Null values by the and make the
defaut Value 0 !
If u can't change the Data in the databaseyou
can use the coalesce function which replaces the Null value by zero (or any
specified value in thesecond argument):
select (coalesce(m1,0) + coalesce(m2,0) + ...
ALL rules get executed. Conditions get combined (actually, parse trees
get merged).
=== BEGIN rule_test.sql ===
CREATE TABLE foo (a int4 PRIMARY KEY, b text);
COPY foo FROM stdin;
1 aaa
2 bbb
3 ccc
4 aaa
5 bbb
6 ccc
\.
CREATE VIEW foo_v AS SELECT * FROM foo WHERE b='bbb';
CREATE
Hi all i am running PostgreSQL 7.3.2,
i have aVIEW for which i implemented
multipleRULES on UPDATE.
The weird think is that the Update Query
corresponding to one of the rules is updating MULTIPLE ROWS even though it
should only update one ROW !!
THE WEIRDEST is that when i remove 2 of
Details:
I have a table transactions_sco and a view transactions_sco_v defined as
:
create view transactions_sco_v as select * from transactions_sco;
I have the following Rules:
CREATE RULE transactions_sco_up1 AS ON
UPDATE TO transactions_sco_v DO INSTEAD UPDATE transactions_sco SET traiter
This means upd1 is redundant since any rows affected by upd1 *must* be
affected by upd2.
OK
CREATE RULE transactions_sco_up8 AS ON
UPDATE TO transactions_sco_v DO INSTEAD UPDATE transactions_sco SET
traiter
= new.traiter WHERE
(transactions_sco.id = old.id);
OK, this one just
Use pg_dump instead of pg_dumpall
example:
pg_dump databaseName databaseDumpFile
if u have many databases, you can make a script that dumps each database in
it's own file
- Original Message -
From: Ilia Chipitsine [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday,
U can use :
select datname from pg_database;
in order to get the list of databses
HTH
Najib.
- Original Message -
From: Ilia Chipitsine [EMAIL PROTECTED]
To: Najib Abi Fadel [EMAIL PROTECTED]
Sent: Thursday, September 16, 2004 10:41 AM
Subject: Re: [GENERAL] pg_dump in cycle
Use
]
To: Najib Abi Fadel [EMAIL PROTECTED]
Sent: Thursday, September 16, 2004 10:41 AM
Subject: Re: [GENERAL] pg_dump in cycle
Use pg_dump instead of pg_dumpall
example:
pg_dump databaseName databaseDumpFile
if u have many databases, you can make a script that dumps each
database
.
- Original Message -
From: Najib Abi Fadel [EMAIL PROTECTED]
To: Ilia Chipitsine [EMAIL PROTECTED]
Cc: generalpost [EMAIL PROTECTED]
Sent: Thursday, September 16, 2004 12:08 PM
Subject: Re: [GENERAL] pg_dump in cycle
Check out the psql command.
U can use :
psql -l
which outputs sometinhg
Is there any postgres function that do the
following:
select func(9123456789);
9 123 456 789
the function is given a number and it returns a
"readable" string representation of the number seperating groups of 3
numbersby spaces.
Thx
/2004;15/01/2004:12/02/2004;
user2
I hope someone will help me in this
issue.
- Original Message -
From:
Najib Abi
Fadel
To: generalpost
Cc: developPost
Sent: Monday, July 05, 2004 12:23
PM
Subject: [GENERAL] creating a complex
aggregate function
Hi
i have
You didn't answer the question though: what timezone are you using?
Asia/Beirut
If SHOW timezone produces something specific, that is the answer.
If it says unknown then what you will need to do is work out
Show timezone says unknown
which of the files under /usr/share/zoneinfo is an exact
Hi
i have atable of dates let's
say:
1/1/2004
8/1/2004
15/1/2004
29/1/2004
5/2/2004
12/2/2004
I am searching for a way to have the minimum date
and maximum date for dates seperated byone week whitout gaps between
them.
which will give the
followingoutput:
1/1/2004, 15/1/2004
29/1/2004 ,
NOTE THAT if field2 or fieldA might contain NULL values u should use
coalesce if u don't want to have a NULL value if one of the fields is NULL:
If field2 and fieldA are strings you will have something like that
(coalesce(t1.field2,'') ||coalesce(t2.fieldA,'')) AS stuff
[EMAIL PROTECTED]
thanx this was the problem : the null values
- Original Message -
From: Stephan Szabo [EMAIL PROTECTED]
To: Najib Abi Fadel [EMAIL PROTECTED]
Cc: generalpost [EMAIL PROTECTED]
Sent: Monday, November 10, 2003 07:58 PM
Subject: Re: [GENERAL] SQL query not returning the value expected
Hi ifyou take a look at the following
query's you can see that the third query should logically
return043219but instead it's not returning any rows ?? What's
happening ??
dragon= SELECT cod_etu from parcours_v where
cod_etu = '043219';cod_etu-(0 rows)
dragon= SELECT
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