From jpiaser@lxsolutions.com Fri Aug  4 08:45:29 2000
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Date: Fri, 04 Aug 2000 10:43:40 +0200
From: julien piaser <jpiaser@lxsolutions.com>
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when enabling the password identification, how can I manage to write a
script to backup my database so it can automaticly be executed... The
problem comes from pg_dump (or pg_dumpall) that both prompt for my login
and password, and I can't give it as an one line argument...

Any suggestions?

regards

J.Piaser




From robson-martins@bol.com.br Fri Jul  19 20:52:40 2002
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From: "Robson Martins" <robson-martins@bol.com.br>
To: <pgsql-admin@postgresql.org>
Subject: pg_dump
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Sou super usu=E1rio (postgres), no entando n=E3o consigo efetuar o pg_dump =
em meu banco. a mensagem que aparece =E9 esta:


pg_dump -c televendas | gzip > tmkt.db.gz

WARNING: owner of type 'capitais' appears to be invalid
WARNING: owner of type 'cepespeciais' appears to be=20


algu=EAm poderia ajudar???

Robson

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2716.2200" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Sou super usu=E1rio (postgres), no entando=
 n=E3o=20
consigo efetuar o pg_dump em meu banco. a mensagem que aparece =E9=20
esta:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>pg_dump -c televendas | gzip &gt;=20
tmkt.db.gz<BR></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>WARNING: owner of type 'capitais' appears =
to be=20
invalid<BR>WARNING: owner of type 'cepespeciais' appears to be <BR></FONT><=
/DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>algu=EAm poderia ajudar???</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Robson</DIV></FONT></BODY></HTML>

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From oprabhu@phildigital.com Wed Dec  31 08:01:21 2003
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To: <pgsql-admin@postgresql.org>
Subject: PG_DUMP 
Date: Wed, 31 Dec 2003 13:31:18 +0530
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Hi,


I am trying to dump large object data( from a database containing table con=
sist of 4 lo fields)
I get following error.
I am using postgres 7.2.1 which is installed from rpm
Command use is=20
   pg_dump -Ft -b test1 > db.tar

I get following message
pg_dump: WARNING: function "lo_oid" not dumped
pg_dump: reason: data type name of argument 0 (oid 16584) not found



When i try restore using pg_restore
Blob data is restored.

Same i tried to postgres7.2.1 which is compiled and install it works fine.

What could be the problem?=20
Is there anyway by which i can fixed this problem by using postgres which i=
s installed using rpm


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<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Hi,</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I am trying to dump large object data( fro=
m a=20
database containing table consist of 4 lo fields)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I get following error.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I am using postgres 7.2.1 which is install=
ed from=20
rpm</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Command use is </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>&nbsp;&nbsp; pg_dump -Ft -b test1 &gt;=20
db.tar</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I get following message</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>pg_dump: WARNING: function "lo_oid" not=20
dumped<BR>pg_dump: reason: data type name of argument 0 (oid 16584) not=20
found</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>When i try restore using pg_restore</FONT>=
</DIV>
<DIV><FONT face=3DArial size=3D2>Blob data is restored.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Same i tried to postgres7.2.1 which is com=
piled and=20
install it works fine.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2><FONT face=3DArial size=3D2>What could be =
the problem?=20
</FONT></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Is there anyway by which i can fixed this =
problem=20
by using postgres which is installed using rpm<BR></DIV></FONT></BODY></HTM=
L>

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From gourish@gmail.com Sun Dec  26 10:09:54 2004
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Date: Sun, 26 Dec 2004 15:39:48 +0530
From: Gourish Singbal <gourish@gmail.com>
Reply-To: Gourish Singbal <gourish@gmail.com>
To: pgsql-admin@postgresql.org
Subject: Pg_dump
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1) I want to take a pg_dump of only few tables 

/usr/local/pgsql/bin/pg_dump -t [table_name] database_name > file.out

allows me only to take dump of single table. Is there a way to take
dump of more than one specific tables.

2) Does pg_dump allow me to take dump of a table so that only some
records are included in the dump (Some thing like specifying a QUERY
in the pg_dump)


-- 
Best,
Gourish Singbal



From bruno@wolff.to Sun Dec  26 17:34:07 2004
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From: Bruno Wolff III <bruno@wolff.to>
To: Gourish Singbal <gourish@gmail.com>
Cc: pgsql-admin@postgresql.org
Subject: Re: Pg_dump
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On Sun, Dec 26, 2004 at 15:39:48 +0530,
  Gourish Singbal <gourish@gmail.com> wrote:
> 1) I want to take a pg_dump of only few tables 
> 
> /usr/local/pgsql/bin/pg_dump -t [table_name] database_name > file.out
> 
> allows me only to take dump of single table. Is there a way to take
> dump of more than one specific tables.

I think this is a new feature for 8.0.

> 2) Does pg_dump allow me to take dump of a table so that only some
> records are included in the dump (Some thing like specifying a QUERY
> in the pg_dump)

I suspect the best way to do this is to create a new table, select the desired
records into that table and then dump it.



From tgl@sss.pgh.pa.us Sun Dec  26 23:33:48 2004
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To: Bruno Wolff III <bruno@wolff.to>
Cc: Gourish Singbal <gourish@gmail.com>, pgsql-admin@postgresql.org
Subject: Re: Pg_dump 
In-reply-to: <20041226174710.GB12115@wolff.to> 
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	<20041226174710.GB12115@wolff.to>
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Bruno Wolff III <bruno@wolff.to> writes:
>   Gourish Singbal <gourish@gmail.com> wrote:
>> allows me only to take dump of single table. Is there a way to take
>> dump of more than one specific tables.

> I think this is a new feature for 8.0.

No, it's not in 8.0 either; you still need a separate pg_dump run for each
table.

			regards, tom lane



From gspiegelberg@cranel.com Mon Dec  27 14:28:50 2004
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From: "Spiegelberg, Greg" <gspiegelberg@cranel.com>
To: pgsql-admin@postgresql.org
Subject: Re: Pg_dump 
Date: Mon, 27 Dec 2004 09:27:53 -0500
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Benig able to exclude tables from dump's would be useful as well.

Greg

-----Original Message-----
From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
Sent: Sunday, December 26, 2004 6:34 PM
To: Bruno Wolff III
Cc: Gourish Singbal; pgsql-admin@postgresql.org
Subject: Re: [ADMIN] Pg_dump 


Bruno Wolff III <bruno@wolff.to> writes:
>   Gourish Singbal <gourish@gmail.com> wrote:
>> allows me only to take dump of single table. Is there a way to take
>> dump of more than one specific tables.

> I think this is a new feature for 8.0.

No, it's not in 8.0 either; you still need a separate pg_dump run for each
table.

			regards, tom lane

---------------------------(end of broadcast)---------------------------
TIP 1: subscribe and unsubscribe commands go to majordomo@postgresql.org



From bruno@wolff.to Mon Dec  27 20:48:51 2004
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From: Bruno Wolff III <bruno@wolff.to>
To: "Spiegelberg, Greg" <gspiegelberg@cranel.com>
Cc: pgsql-admin@postgresql.org
Subject: Re: Pg_dump
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On Mon, Dec 27, 2004 at 09:27:53 -0500,
  "Spiegelberg, Greg" <gspiegelberg@cranel.com> wrote:
> Benig able to exclude tables from dump's would be useful as well.

There was some discussion about doing this kind of thing about 6 months
ago (shortly before beta). I appearantly misremembered the end result
of the discussion, but you should be able to find it in the archives.

> 
> Greg
> 
> -----Original Message-----
> From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
> Sent: Sunday, December 26, 2004 6:34 PM
> To: Bruno Wolff III
> Cc: Gourish Singbal; pgsql-admin@postgresql.org
> Subject: Re: [ADMIN] Pg_dump 
> 
> 
> Bruno Wolff III <bruno@wolff.to> writes:
> >   Gourish Singbal <gourish@gmail.com> wrote:
> >> allows me only to take dump of single table. Is there a way to take
> >> dump of more than one specific tables.
> 
> > I think this is a new feature for 8.0.
> 
> No, it's not in 8.0 either; you still need a separate pg_dump run for each
> table.
> 
> 			regards, tom lane
> 
> ---------------------------(end of broadcast)---------------------------
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From gourish@gmail.com Tue Dec  28 15:55:59 2004
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From: Gourish Singbal <gourish@gmail.com>
Reply-To: Gourish Singbal <gourish@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Subject: Re: Pg_dump
Cc: Bruno Wolff III <bruno@wolff.to>, pgsql-admin@postgresql.org
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Thanks

i will try to find the answer in the archives,  

Also will having a saperate schema for a set of tables help me in
taking pg_dump only of specific tables. is it possible to create
schema for already existing  postgresql database tables ?.

Also how do i know is any tables need recovery...
like in oracle we come to know from a view called as v$recovery_log.
is some thing like is this possible in postgres.

Best
Gourish

On Sun, 26 Dec 2004 18:33:37 -0500, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Bruno Wolff III <bruno@wolff.to> writes:
> >   Gourish Singbal <gourish@gmail.com> wrote:
> >> allows me only to take dump of single table. Is there a way to take
> >> dump of more than one specific tables.
> 
> > I think this is a new feature for 8.0.
> 
> No, it's not in 8.0 either; you still need a separate pg_dump run for each
> table.
> 
>                        regards, tom lane
> 


-- 
Best,
Gourish Singbal



From nirav.p@workskillsprofessionals.com.au Mon Oct  10 05:27:01 2005
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Hi,
=20
I am trying to write cronjob so it will backup database everynight on
another machine.=20
Currently is doing it on the same machine with this script.=20
=20
20 13 * * * pg_dump -F c -f /root/database.pgdump database
=20
How can I send it to different machine. Machine IP address is
192.168.1.13
=20
Is it possible to write pg_restore job ones it finishes dumping on that
machine?
=20
Does anybody know how to do this?

Thanks in Advance.
=20
=20

Regards,

Neo=20

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<BODY>
<DIV><SPAN class=3D250272405-10102005><FONT =
size=3D2>Hi,</FONT></SPAN></DIV>
<DIV><SPAN class=3D250272405-10102005><FONT =
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D250272405-10102005><FONT size=3D2>I am trying to =
write cronjob so=20
it will backup database everynight on another machine. =
</FONT></SPAN></DIV>
<DIV><SPAN class=3D250272405-10102005><FONT size=3D2>Currently is doing =
it on the=20
same machine with this script. </FONT></SPAN></DIV>
<DIV><SPAN class=3D250272405-10102005><FONT =
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><FONT size=3D2>20 13 * * * pg_dump -F c -f /root/<SPAN=20
class=3D250272405-10102005>database</SPAN>.pgdump&nbsp;<SPAN=20
class=3D250272405-10102005>database</SPAN></FONT></DIV>
<DIV><FONT size=3D2><SPAN =
class=3D250272405-10102005></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2><SPAN class=3D250272405-10102005>How can I send it =
to different=20
machine. Machine IP address is 192.168.1.13</SPAN></FONT></DIV>
<DIV><FONT size=3D2><SPAN =
class=3D250272405-10102005></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2><SPAN class=3D250272405-10102005>Is it possible to =
write=20
pg_restore job ones it finishes dumping on that =
machine?</SPAN></FONT></DIV>
<DIV><FONT size=3D2><SPAN =
class=3D250272405-10102005></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2><SPAN class=3D250272405-10102005>Does anybody know =
how to do=20
this?</SPAN></FONT></DIV><FONT size=3D2><SPAN =
class=3D250272405-10102005>
<DIV><BR>Thanks in Advance.</DIV>
<DIV>&nbsp;</DIV>
<DIV></SPAN>&nbsp;</DIV>
<DIV><BR></DIV></FONT>
<DIV align=3Dleft><STRONG><FONT size=3D2>Regards,</FONT></STRONG></DIV>
<DIV align=3Dleft><BR><SPAN class=3D250272405-10102005><FONT =
size=3D2>Neo=20
</FONT></SPAN></DIV></BODY></HTML>

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From fluca1978@infinito.it Mon Oct  10 06:48:56 2005
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Date: Mon, 10 Oct 2005 08:48:59 +0200
From: Luca Ferrari <fluca1978@infinito.it>
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Nirav Parikh's cat, on 10/10/2005 7.30, walking on the keyboard wrote:
> Hi,
>  
> I am trying to write cronjob so it will backup database everynight on
> another machine. 
> Currently is doing it on the same machine with this script. 
>  
> 20 13 * * * pg_dump -F c -f /root/database.pgdump database
>  
> How can I send it to different machine. Machine IP address is
> 192.168.1.13

You can use ssh to copy the dump file to another machine. Configuring 
ssh to use ssh_agent you will not be required to insert a passwrod, thus 
you can do it automatically. I guess there's also an option to specify 
the password on the command line.


>  
> Is it possible to write pg_restore job ones it finishes dumping on that
> machine?

I guess you can write a shell script that checks, periodically, if the 
restore file has been copied, then restores it and delete the files 
(thus to not restore it infinitely).

Luca

-- 
Luca Ferrari
fluca1978@infinito.it



From renneyt@yahoo.com Fri May  26 04:51:01 2006
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Is there a way to do a selective pg_dump of a table using a select where 
clause? As in ... dump all records where now-col_date < 2 or 
col_date='01-may-2006' etc.. ?

Thanks



From jeff@endpoint.com Fri May  26 13:52:20 2006
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Date: Fri, 26 May 2006 09:45:24 -0400
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renneyt@yahoo.com wrote:
> Is there a way to do a selective pg_dump of a table using a select
> where clause? As in ... dump all records where now-col_date < 2 or
> col_date='01-may-2006' etc.. ?
You can transfer the subset of data to another table, e.g.,

create table my_dump as select * from table_foo where ...

and then dump that table. Note that you can't do this to a view (pg_dump
will dump the view definition, but not the data).

-- 
Jeffery Boes  <><
jeff@endpoint.com




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Hi.

Why in pg_dump there is no feature --jobs=number-of-jobs
like in pg_restore?

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<div dir=3D"ltr">Hi.<div><br></div><div>Why in pg_dump there is no feature=
=C2=A0<span style=3D"color:rgb(0,0,0);font-family:monospace;font-size:12.84=
4px">--jobs=3D</span><tt class=3D"" style=3D"font-weight:bold;font-style:it=
alic;font-size:12.844px;color:rgb(0,0,0)">number-of-jobs=C2=A0</tt></div>li=
ke in pg_restore?</div>

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From: Artem Tomyuk <admin@leboutique.com>
Date: Thu, 24 Dec 2015 00:29:39 +0200
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 <CANYYVqJ_KAED03OYyiXOHNMt1VHrHj16P4JsBWekBodjVs+L6Q@mail.gmail.com>
Subject: Re: pg_dump
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Sorry, my bad.

2015-12-24 0:27 GMT+02:00 Artem Tomyuk <admin@leboutique.com>:

> Hi.
>
> Why in pg_dump there is no feature --jobs=number-of-jobs
> like in pg_restore?
>

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<div dir=3D"ltr">Sorry, my bad.</div><div class=3D"gmail_extra"><br><div cl=
ass=3D"gmail_quote">2015-12-24 0:27 GMT+02:00 Artem Tomyuk <span dir=3D"ltr=
">&lt;<a href=3D"mailto:admin@leboutique.com" target=3D"_blank">admin@lebou=
tique.com</a>&gt;</span>:<br><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr=
">Hi.<div><br></div><div>Why in pg_dump there is no feature=C2=A0<span styl=
e=3D"color:rgb(0,0,0);font-family:monospace;font-size:12.844px">--jobs=3D</=
span><tt style=3D"font-weight:bold;font-style:italic;font-size:12.844px;col=
or:rgb(0,0,0)">number-of-jobs=C2=A0</tt></div>like in pg_restore?</div>
</blockquote></div><br></div>

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Pg_dump missing -d option =E2=80=A6 It was working fine till yesterday sudd=
enly
today I see this option is missing in one of our server. Any
suggestions????

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Pg_dump missing -d option =E2=80=A6 It was working fine till yesterday sudd=
enly today I see this option is missing in one of our server. Any suggestio=
ns????

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On Tuesday, December 7, 2021, Firthouse banu <penguinsfairy@gmail.com>
wrote:

> Pg_dump missing -d option =E2=80=A6 It was working fine till yesterday su=
ddenly
> today I see this option is missing in one of our server. Any
> suggestions????


It seems more likely you are misunderstanding whatever unstated error
message you are seeing=E2=80=A6

David J.

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On Tuesday, December 7, 2021, Firthouse banu &lt;<a href=3D"mailto:penguins=
fairy@gmail.com">penguinsfairy@gmail.com</a>&gt; wrote:<br><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pad=
ding-left:1ex">Pg_dump missing -d option =E2=80=A6 It was working fine till=
 yesterday suddenly today I see this option is missing in one of our server=
. Any suggestions????
</blockquote><div><br></div><div>It seems more likely you are misunderstand=
ing whatever unstated error message you are seeing=E2=80=A6</div><div><br><=
/div><div>David J.</div><div>=C2=A0</div>

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To: pgsql-admin@lists.postgresql.org
References: 
 <CAK_Ha4w9vcPn5Oe8suS17FqW0aGyguytu4-A7EgGZcdJqnzs+A@mail.gmail.com>
From: Mladen Gogala <gogala.mladen@gmail.com>
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On 12/7/21 02:08, Firthouse banu wrote:
> Pg_dump missing -d option … It was working fine till yesterday 
> suddenly today I see this option is missing in one of our server. Any 
> suggestions???? 

Maybe the option took a vacation on Barbados? Have you checked your 
email for auto-response? Barbados is beautiful this time of year. If you 
need more serious response, you will have to provide more data:

 1. What version of PostgreSQL are you using?
 2. What has changed since yesterday?
 3. Have you checked logs?

-- 
Mladen Gogala
Database Consultant
Tel: (347) 321-1217
https://dbwhisperer.wordpress.com

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<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <div class="moz-cite-prefix">On 12/7/21 02:08, Firthouse banu wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAK_Ha4w9vcPn5Oe8suS17FqW0aGyguytu4-A7EgGZcdJqnzs+A@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      Pg_dump missing -d option … It was working fine till yesterday
      suddenly today I see this option is missing in one of our server.
      Any suggestions????
    </blockquote>
    <p>Maybe the option took a vacation on Barbados? Have you checked
      your email for auto-response? Barbados is beautiful this time of
      year. If you need more serious response, you will have to provide
      more data:</p>
    <ol>
      <li>What version of PostgreSQL are you using?</li>
      <li>What has changed since yesterday? <br>
      </li>
      <li>Have you checked logs?<br>
      </li>
    </ol>
    <pre class="moz-signature" cols="72">-- 
Mladen Gogala
Database Consultant
Tel: (347) 321-1217
<a class="moz-txt-link-freetext" href="https://dbwhisperer.wordpress.com">https://dbwhisperer.wordpress.com</a>
</pre>
  </body>
</html>
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Subject: Re: Pg_dump
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Most likely: you have omitted a previous argument which results in -d =
being taken as an arg instead of a flag=





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Hi

Will pg_dump cause blocking queries? If so how to take dump without
blocking?

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<div dir="auto">Hi<div dir="auto"><br></div><div dir="auto">Will pg_dump cause blocking queries? If so how to take dump without blocking?</div></div>

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Cc: rajeshkumar.dba09@gmail.com
Message-ID: <404a126a-6229-7d83-9b86-70304a5693bc@jakobs.com>
Subject: Re: Pg_dump
References: <CAJk5AtZX23PBG4rfrVt6cp3z_pYGtEE5JvvCRG6Lj3F7=1+C2Q@mail.gmail.com>
In-Reply-To: <CAJk5AtZX23PBG4rfrVt6cp3z_pYGtEE5JvvCRG6Lj3F7=1+C2Q@mail.gmail.com>

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From scott_ribe@elevated-dev.com Thu Dec  7 18:26:15 2023
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Subject: Re: Pg_dump
From: Scott Ribe <scott_ribe@elevated-dev.com>
In-Reply-To: <404a126a-6229-7d83-9b86-70304a5693bc@jakobs.com>
Date: Thu, 7 Dec 2023 11:26:15 -0700
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Message-Id: <370989DB-26AD-451A-AF28-C4752E08FE77@elevated-dev.com>
References: 
 <CAJk5AtZX23PBG4rfrVt6cp3z_pYGtEE5JvvCRG6Lj3F7=1+C2Q@mail.gmail.com>
 <404a126a-6229-7d83-9b86-70304a5693bc@jakobs.com>
To: Rajesh Kumar <rajeshkumar.dba09@gmail.com>
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> Readers don't block writers, writers don't block readers in =
PostgreSQL.
>=20
> pg_dump is a reader.
>=20
> --=20
> Holger Jakobs, Bergisch Gladbach, Tel. +49-178-9759012

Additionally, I've done some stress testing and found that pg_dump puts =
surprisingly low load on our dbs. Of course, like everything else, this =
dependent on your specifics--after all the dump will require reading all =
rows, so for instance if you're disk-bound, you could see a performance =
hit. But generally, if your db is running in a reasonably "healthy" =
performance range and not already close to limits, pg_dump won't have a =
performance impact visible to users.






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From: jason cable <cablej2082@gmail.com>
To: Scott Ribe <scott_ribe@elevated-dev.com>, Rajesh Kumar
	<rajeshkumar.dba09@gmail.com>
CC: Pgsql-admin <pgsql-admin@lists.postgresql.org>
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That happens to me too the last time I took dump

Get Outlook for Android<https://aka.ms/AAb9ysg>
________________________________
From: Scott Ribe <scott_ribe@elevated-dev.com>
Sent: Thursday, December 7, 2023 10:26:15 AM
To: Rajesh Kumar <rajeshkumar.dba09@gmail.com>
Cc: Pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Re: Pg_dump

> Readers don't block writers, writers don't block readers in PostgreSQL.
>
> pg_dump is a reader.
>
> --
> Holger Jakobs, Bergisch Gladbach, Tel. +49-178-9759012

Additionally, I've done some stress testing and found that pg_dump puts sur=
prisingly low load on our dbs. Of course, like everything else, this depend=
ent on your specifics--after all the dump will require reading all rows, so=
 for instance if you're disk-bound, you could see a performance hit. But ge=
nerally, if your db is running in a reasonably "healthy" performance range =
and not already close to limits, pg_dump won't have a performance impact vi=
sible to users.




--_000_LV3P222MB09852463EF05D3AF0CC37C2AF08BALV3P222MB0985NAMP_
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<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
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<body>
<div dir=3D"auto">That happens to me too the last time I took dump</div>
<div><br>
</div>
<div id=3D"ms-outlook-mobile-signature" dir=3D"auto">Get <a href=3D"https:/=
/aka.ms/AAb9ysg">
Outlook for Android</a></div>
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" st=
yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> Scott Ribe &lt;scott_=
ribe@elevated-dev.com&gt;<br>
<b>Sent:</b> Thursday, December 7, 2023 10:26:15 AM<br>
<b>To:</b> Rajesh Kumar &lt;rajeshkumar.dba09@gmail.com&gt;<br>
<b>Cc:</b> Pgsql-admin &lt;pgsql-admin@lists.postgresql.org&gt;<br>
<b>Subject:</b> Re: Pg_dump</font>
<div>&nbsp;</div>
</div>
<div class=3D"BodyFragment"><font size=3D"2"><span style=3D"font-size:11pt;=
">
<div class=3D"PlainText">&gt; Readers don't block writers, writers don't bl=
ock readers in PostgreSQL.<br>
&gt; <br>
&gt; pg_dump is a reader.<br>
&gt; <br>
&gt; -- <br>
&gt; Holger Jakobs, Bergisch Gladbach, Tel. +49-178-9759012<br>
<br>
Additionally, I've done some stress testing and found that pg_dump puts sur=
prisingly low load on our dbs. Of course, like everything else, this depend=
ent on your specifics--after all the dump will require reading all rows, so=
 for instance if you're disk-bound,
 you could see a performance hit. But generally, if your db is running in a=
 reasonably &quot;healthy&quot; performance range and not already close to =
limits, pg_dump won't have a performance impact visible to users.<br>
<br>
<br>
<br>
</div>
</span></font></div>
</body>
</html>

--_000_LV3P222MB09852463EF05D3AF0CC37C2AF08BALV3P222MB0985NAMP_--





From tgl@sss.pgh.pa.us Thu Dec  7 18:52:49 2023
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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Holger Jakobs <holger@jakobs.com>
cc: pgsql-admin@lists.postgresql.org, rajeshkumar.dba09@gmail.com
Subject: Re: Pg_dump
In-reply-to: <404a126a-6229-7d83-9b86-70304a5693bc@jakobs.com>
References: 
 <CAJk5AtZX23PBG4rfrVt6cp3z_pYGtEE5JvvCRG6Lj3F7=1+C2Q@mail.gmail.com>
 <404a126a-6229-7d83-9b86-70304a5693bc@jakobs.com>
Comments: In-reply-to Holger Jakobs <holger@jakobs.com>
	message dated "Thu, 07 Dec 2023 19:13:40 +0100"
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Date: Thu, 07 Dec 2023 13:52:49 -0500
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Holger Jakobs <holger@jakobs.com> writes:
> Am 07.12.23 um 19:11 schrieb Rajesh Kumar:
>> Will pg_dump cause blocking queries? If so how to take dump without 
>> blocking?

> Readers don't block writers, writers don't block readers in PostgreSQL.
> pg_dump is a reader.

To enlarge on that a bit: pg_dump takes AccessShareLock on every
table it intends to dump.  This does not conflict with ordinary
DML updates.  It *will* conflict with anything that wants
AccessExclusiveLock, which typically is schema-altering DDL.
See

https://www.postgresql.org/docs/current/explicit-locking.html#LOCKING-TABLES

So the answer to your question is "don't try to alter the
database schema while pg_dump is running".  You can alter
database content freely, though.

			regards, tom lane





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From: M Sarwar <sarwarmd02@outlook.com>
To: Tom Lane <tgl@sss.pgh.pa.us>, Holger Jakobs <holger@jakobs.com>
CC: "pgsql-admin@lists.postgresql.org" <pgsql-admin@lists.postgresql.org>,
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Subject: Re: Pg_dump
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Date: Thu, 7 Dec 2023 20:39:06 +0100
From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: M Sarwar <sarwarmd02@outlook.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Holger Jakobs <holger@jakobs.com>,
	"pgsql-admin@lists.postgresql.org" <pgsql-admin@lists.postgresql.org>,
 "rajeshkumar.dba09@gmail.com" <rajeshkumar.dba09@gmail.com>
Subject: Re: Pg_dump
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On 2023-Dec-07, M Sarwar wrote:

> I agree with Tom. This is making the difference. I ran into this scenario several times in the past.
> But whole database is becoming slow when the dump is happening .

For large databases with very high rate of updates, a running pg_dump
can prevent vacuum from removing old versions of rows.  This can make
the operations slower because of accumulation of bloat.

For such situations, pg_dump is not really recommended.  It's better to
use a physical backup (say, pgbarman), or if you really need a pg_dump
output file for some reason, create a replica (with _no_
hot_standby_feedback) and run pg_dump there.

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/
"I'm always right, but sometimes I'm more right than other times."
                                                  (Linus Torvalds)
https://lore.kernel.org/git/Pine.LNX.4.58.0504150753440.7211@ppc970.osdl.org/





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I could see the side of table inside db is 24 gb.

I was taking dump and it is growing over 30gb. Then I stopped dump process


What coule be the issue?

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<div dir=3D"auto">I could see the side of table inside db is 24 gb.<div dir=
=3D"auto"><br></div><div dir=3D"auto">I was taking dump and it is growing o=
ver 30gb. Then I stopped dump process</div><div dir=3D"auto"><br></div><div=
 dir=3D"auto"><br></div><div dir=3D"auto">What coule be the issue?</div></d=
iv>

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On Thursday, December 7, 2023, Rajesh Kumar <rajeshkumar.dba09@gmail.com>
wrote:

> I could see the side of table inside db is 24 gb.
>
> I was taking dump and it is growing over 30gb. Then I stopped dump process
>
>
> What coule be the issue?
>

Non-compression of the dumped data?  Maybe give some help and show the
commands you are using to check the size and perform the dump.

David J.

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On Thursday, December 7, 2023, Rajesh Kumar &lt;<a href=3D"mailto:rajeshkum=
ar.dba09@gmail.com">rajeshkumar.dba09@gmail.com</a>&gt; wrote:<br><blockquo=
te class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc so=
lid;padding-left:1ex"><div dir=3D"auto">I could see the side of table insid=
e db is 24 gb.<div dir=3D"auto"><br></div><div dir=3D"auto">I was taking du=
mp and it is growing over 30gb. Then I stopped dump process</div><div dir=
=3D"auto"><br></div><div dir=3D"auto"><br></div><div dir=3D"auto">What coul=
e be the issue?</div></div></blockquote><div><br></div><div>Non-compression=
 of the dumped data?=C2=A0 Maybe give some help and show the commands you a=
re using to check the size and perform the dump.</div><div><br></div><div>D=
avid J.</div><div>=C2=A0</div>

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Luckily when I am taking a dump, database size is not  growing. If the size=
 grows, my dump will fail because it has no space left on my environment.
Thanks,
Sarwar

________________________________
From: Rajesh Kumar <rajeshkumar.dba09@gmail.com>
Sent: Thursday, December 7, 2023 2:52 PM
To: Pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Pg_dump

I could see the side of table inside db is 24 gb.

I was taking dump and it is growing over 30gb. Then I stopped dump process


What coule be the issue?

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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof">
Luckily when I am taking a dump, database size is not&nbsp; growing. If the=
 size grows, my dump will fail because it has no space left on my environme=
nt.</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof">
Thanks,</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof">
Sarwar</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof">
<br>
</div>
<div id=3D"appendonsend"></div>
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" st=
yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> Rajesh Kumar &lt;raje=
shkumar.dba09@gmail.com&gt;<br>
<b>Sent:</b> Thursday, December 7, 2023 2:52 PM<br>
<b>To:</b> Pgsql-admin &lt;pgsql-admin@lists.postgresql.org&gt;<br>
<b>Subject:</b> Pg_dump</font>
<div>&nbsp;</div>
</div>
<div>
<div dir=3D"auto">I could see the side of table inside db is 24 gb.
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">I was taking dump and it is growing over 30gb. Then I sto=
pped dump process</div>
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">What coule be the issue?</div>
</div>
</div>
</body>
</html>

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From: jason cable <cablej2082@gmail.com>
Date: Thu, 7 Dec 2023 12:00:15 -0800
Message-ID: 
 <CAEAiAvz8PcUY7a-pt6GxozC7BMCDeGJfjY4wnHnUfa01G_XVXw@mail.gmail.com>
Subject: Re: Pg_dump
To: M Sarwar <sarwarmd02@outlook.com>
Cc: Rajesh Kumar <rajeshkumar.dba09@gmail.com>,
	Pgsql-admin <pgsql-admin@lists.postgresql.org>
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do you feel the need to squeeze the big data through small hole for
verification?

On Thu, Dec 7, 2023 at 11:59=E2=80=AFAM M Sarwar <sarwarmd02@outlook.com> w=
rote:

> Luckily when I am taking a dump, database size is not  growing. If the
> size grows, my dump will fail because it has no space left on my
> environment.
> Thanks,
> Sarwar
>
> ------------------------------
> *From:* Rajesh Kumar <rajeshkumar.dba09@gmail.com>
> *Sent:* Thursday, December 7, 2023 2:52 PM
> *To:* Pgsql-admin <pgsql-admin@lists.postgresql.org>
> *Subject:* Pg_dump
>
> I could see the side of table inside db is 24 gb.
>
> I was taking dump and it is growing over 30gb. Then I stopped dump proces=
s
>
>
> What coule be the issue?
>

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<div dir=3D"ltr">do you feel the need to squeeze the big data through small=
 hole for verification?</div><br><div class=3D"gmail_quote"><div dir=3D"ltr=
" class=3D"gmail_attr">On Thu, Dec 7, 2023 at 11:59=E2=80=AFAM M Sarwar &lt=
;<a href=3D"mailto:sarwarmd02@outlook.com">sarwarmd02@outlook.com</a>&gt; w=
rote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class=
=3D"msg3123163587300828069">




<div dir=3D"ltr">
<div style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color=
:rgb(0,0,0)">
Luckily when I am taking a dump, database size is not=C2=A0 growing. If the=
 size grows, my dump will fail because it has no space left on my environme=
nt.</div>
<div style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color=
:rgb(0,0,0)">
Thanks,</div>
<div style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color=
:rgb(0,0,0)">
Sarwar</div>
<div style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color=
:rgb(0,0,0)">
<br>
</div>
<div id=3D"m_3123163587300828069appendonsend"></div>
<hr style=3D"display:inline-block;width:98%">
<div id=3D"m_3123163587300828069divRplyFwdMsg" dir=3D"ltr"><font face=3D"Ca=
libri, sans-serif" style=3D"font-size:11pt" color=3D"#000000"><b>From:</b> =
Rajesh Kumar &lt;<a href=3D"mailto:rajeshkumar.dba09@gmail.com" target=3D"_=
blank">rajeshkumar.dba09@gmail.com</a>&gt;<br>
<b>Sent:</b> Thursday, December 7, 2023 2:52 PM<br>
<b>To:</b> Pgsql-admin &lt;<a href=3D"mailto:pgsql-admin@lists.postgresql.o=
rg" target=3D"_blank">pgsql-admin@lists.postgresql.org</a>&gt;<br>
<b>Subject:</b> Pg_dump</font>
<div>=C2=A0</div>
</div>
<div>
<div dir=3D"auto">I could see the side of table inside db is 24 gb.
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">I was taking dump and it is growing over 30gb. Then I sto=
pped dump process</div>
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">What coule be the issue?</div>
</div>
</div>
</div>

</div></blockquote></div>

--00000000000042da5f060bf0eb64--





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From: M Sarwar <sarwarmd02@outlook.com>
To: jason cable <cablej2082@gmail.com>
CC: Rajesh Kumar <rajeshkumar.dba09@gmail.com>, Pgsql-admin
	<pgsql-admin@lists.postgresql.org>
Subject: Re: Pg_dump
Thread-Topic: Pg_dump
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Date: Thu, 7 Dec 2023 20:02:30 +0000
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Date: Thu, 7 Dec 2023 16:31:54 -0500
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On Thu, Dec 7, 2023 at 2:52=E2=80=AFPM Rajesh Kumar <rajeshkumar.dba09@gmai=
l.com>
wrote:

> I could see the side of table inside db is 24 gb.
>
> I was taking dump and it is growing over 30gb. Then I stopped dump proces=
s
>
>
> What coule be the issue?
>

The exact command you ran.

Since you didn't show us the whole command, with options, we can't tell you=
.

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<div dir=3D"ltr"><div dir=3D"ltr">On Thu, Dec 7, 2023 at 2:52=E2=80=AFPM Ra=
jesh Kumar &lt;<a href=3D"mailto:rajeshkumar.dba09@gmail.com">rajeshkumar.d=
ba09@gmail.com</a>&gt; wrote:<br></div><div class=3D"gmail_quote"><blockquo=
te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px =
solid rgb(204,204,204);padding-left:1ex"><div dir=3D"auto">I could see the =
side of table inside db is 24 gb.<div dir=3D"auto"><br></div><div dir=3D"au=
to">I was taking dump and it is growing over 30gb. Then I stopped dump proc=
ess</div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></div><div dir=
=3D"auto">What coule be the issue?</div></div></blockquote><div><br></div><=
div>The exact command you ran.</div><div><br></div><div>Since you didn&#39;=
t show us the whole command, with options, we can&#39;t tell you.</div></di=
v></div>

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Hi All

Please let me know if the below option persists while using pg_dump command:

-t table_name --exclude-column column_name

I have a table with a column having bytea data type (BLOBS). I just want to
exclude this in the dump file as it is of 99GB but I want the other data in
the same table which is of only 22MB.

Please let me know any work around this.

I used this option in pg_dump but that didn't work:

--exclude-table-data = table_name

PG version 12.19

Thanks,
Wasim

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<div dir=3D"auto">Hi All<div dir=3D"auto"><br></div><div dir=3D"auto">Pleas=
e let me know if the below option persists while using pg_dump command:</di=
v><div dir=3D"auto"><br></div><div dir=3D"auto">-t table_name --exclude-col=
umn column_name</div><div dir=3D"auto"><br></div><div dir=3D"auto">I have a=
 table with a column having bytea data type (BLOBS). I just want to exclude=
 this in the dump file as it is of 99GB but I want the other data in the sa=
me table which is of only 22MB.</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">Please let me know any work around=C2=A0this.</div><div dir=3D"au=
to"><br></div><div dir=3D"auto">I used this option in pg_dump but that didn=
&#39;t work:</div><div dir=3D"auto"><br></div><div dir=3D"auto">--exclude-t=
able-data =3D table_name</div><div dir=3D"auto"><br></div><div dir=3D"auto"=
>PG version 12.19</div><div dir=3D"auto"><br></div><div dir=3D"auto">Thanks=
,</div><div dir=3D"auto">Wasim=C2=A0</div></div>

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Subject: Re: pg_dump
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On Monday, August 12, 2024, Wasim Devale <wasimd60@gmail.com> wrote:
>
>
> Please let me know if the below option persists while using pg_dump
> command:
>
> -t table_name --exclude-column column_name
>

No, there is no option to dump a partial table, rows or columns.


>
> I just want to exclude this in the dump file as it is of 99GB but I want
> the other data in the same table which is of only 22MB.
>
> Please let me know any work around this.
>

Write your own copy command to export that table=E2=80=99s contents.  See t=
he
=E2=80=94snapshot option.

David J.

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On Monday, August 12, 2024, Wasim Devale &lt;<a href=3D"mailto:wasimd60@gma=
il.com">wasimd60@gmail.com</a>&gt; wrote:<blockquote class=3D"gmail_quote" =
style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><di=
v dir=3D"auto"><div dir=3D"auto"><br></div><div dir=3D"auto">Please let me =
know if the below option persists while using pg_dump command:</div><div di=
r=3D"auto"><br></div><div dir=3D"auto">-t table_name --exclude-column colum=
n_name</div></div></blockquote><div><br></div><div>No, there is no option t=
o dump a partial table, rows or columns.</div><div>=C2=A0</div><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid=
;padding-left:1ex"><div dir=3D"auto"><div dir=3D"auto"><br></div><div dir=
=3D"auto">I just want to exclude this in the dump file as it is of 99GB but=
 I want the other data in the same table which is of only 22MB.</div><div d=
ir=3D"auto"><br></div><div dir=3D"auto">Please let me know any work around=
=C2=A0this.</div></div></blockquote><div><br></div><div>Write your own copy=
 command to export that table=E2=80=99s contents.=C2=A0 See the =E2=80=94sn=
apshot option.</div><div><br></div><div>David J.</div><div><br></div><block=
quote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc=
 solid;padding-left:1ex">
</blockquote>

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From: Wasim Devale <wasimd60@gmail.com>
Date: Tue, 13 Aug 2024 11:52:17 +0530
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 <CAB5fag6zyWM8BwXDskOCu5OOruxaV9wUjEp-tpTO63EjGXRivQ@mail.gmail.com>
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I did one thing, we can exclude the toast table in the pg_dump command that
has the BLOBS data for a particular table.

--exclude-table-data=3Dpg_toast.pg_toast_10176226

Thanks,
Wasim

On Tue, 13 Aug, 2024, 12:48=E2=80=AFam Holger Jakobs, <holger@jakobs.com> w=
rote:

> Am 12.08.24 um 21:09 schrieb Wasim Devale:
> > Hi All
> >
> > Please let me know if the below option persists while using pg_dump
> > command:
> >
> > -t table_name --exclude-column column_name
> >
> > I have a table with a column having bytea data type (BLOBS). I just
> > want to exclude this in the dump file as it is of 99GB but I want the
> > other data in the same table which is of only 22MB.
> >
> > Please let me know any work around this.
> >
> > I used this option in pg_dump but that didn't work:
> >
> > --exclude-table-data =3D table_name
> >
> > PG version 12.19
> >
> > Thanks,
> > Wasim
> No, pg_dump can only dump complete tables.
>
> An alternative would be exporting the result of a select command via
> COPY or \copy to a file, which can easily be read again with COPY or \cop=
y
>
> COPY is an SQL command and has to be used by a superuser because it
> writes to (or reads from) a file on the server.
> \copy is a psql command and thus can only be executed in psql (not any
> other client) and by any user, because it writes to (or reads from) a
> file on the client computer.
>
> Kind Regards,
>
> Holger
>
> --
>
> Holger Jakobs, Bergisch Gladbach
>
>

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<p dir=3D"ltr">I did one thing, we can exclude the toast table in the pg_du=
mp command that has the BLOBS data for a particular table.</p>
<p dir=3D"ltr">--exclude-table-data=3Dpg_toast.pg_toast_10176226</p>
<p dir=3D"ltr">Thanks,<br>
Wasim</p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue=
, 13 Aug, 2024, 12:48=E2=80=AFam Holger Jakobs, &lt;<a href=3D"mailto:holge=
r@jakobs.com">holger@jakobs.com</a>&gt; wrote:<br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">Am 12.08.24 um 21:09 schrieb Wasim Devale:<br>
&gt; Hi All<br>
&gt;<br>
&gt; Please let me know if the below option persists while using pg_dump <b=
r>
&gt; command:<br>
&gt;<br>
&gt; -t table_name --exclude-column column_name<br>
&gt;<br>
&gt; I have a table with a column having bytea data type (BLOBS). I just <b=
r>
&gt; want to exclude this in the dump file as it is of 99GB but I want the =
<br>
&gt; other data in the same table which is of only 22MB.<br>
&gt;<br>
&gt; Please let me know any work around=C2=A0this.<br>
&gt;<br>
&gt; I used this option in pg_dump but that didn&#39;t work:<br>
&gt;<br>
&gt; --exclude-table-data =3D table_name<br>
&gt;<br>
&gt; PG version 12.19<br>
&gt;<br>
&gt; Thanks,<br>
&gt; Wasim<br>
No, pg_dump can only dump complete tables.<br>
<br>
An alternative would be exporting the result of a select command via <br>
COPY or \copy to a file, which can easily be read again with COPY or \copy<=
br>
<br>
COPY is an SQL command and has to be used by a superuser because it <br>
writes to (or reads from) a file on the server.<br>
\copy is a psql command and thus can only be executed in psql (not any <br>
other client) and by any user, because it writes to (or reads from) a <br>
file on the client computer.<br>
<br>
Kind Regards,<br>
<br>
Holger<br>
<br>
-- <br>
<br>
Holger Jakobs, Bergisch Gladbach<br>
<br>
</blockquote></div>

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From: Wasim Devale <wasimd60@gmail.com>
Date: Tue, 13 Aug 2024 11:52:49 +0530
Message-ID: 
 <CAB5fag7=axqdG1HMroNWa7Q4r7T3oZNj_KeqC5ZkUoudKispaQ@mail.gmail.com>
Subject: Re: pg_dump
To: Holger Jakobs <holger@jakobs.com>
Cc: pgsql-admin@lists.postgresql.org
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Please let me know your inputs.

On Tue, 13 Aug, 2024, 11:52=E2=80=AFam Wasim Devale, <wasimd60@gmail.com> w=
rote:

> I did one thing, we can exclude the toast table in the pg_dump command
> that has the BLOBS data for a particular table.
>
> --exclude-table-data=3Dpg_toast.pg_toast_10176226
>
> Thanks,
> Wasim
>
> On Tue, 13 Aug, 2024, 12:48=E2=80=AFam Holger Jakobs, <holger@jakobs.com>=
 wrote:
>
>> Am 12.08.24 um 21:09 schrieb Wasim Devale:
>> > Hi All
>> >
>> > Please let me know if the below option persists while using pg_dump
>> > command:
>> >
>> > -t table_name --exclude-column column_name
>> >
>> > I have a table with a column having bytea data type (BLOBS). I just
>> > want to exclude this in the dump file as it is of 99GB but I want the
>> > other data in the same table which is of only 22MB.
>> >
>> > Please let me know any work around this.
>> >
>> > I used this option in pg_dump but that didn't work:
>> >
>> > --exclude-table-data =3D table_name
>> >
>> > PG version 12.19
>> >
>> > Thanks,
>> > Wasim
>> No, pg_dump can only dump complete tables.
>>
>> An alternative would be exporting the result of a select command via
>> COPY or \copy to a file, which can easily be read again with COPY or \co=
py
>>
>> COPY is an SQL command and has to be used by a superuser because it
>> writes to (or reads from) a file on the server.
>> \copy is a psql command and thus can only be executed in psql (not any
>> other client) and by any user, because it writes to (or reads from) a
>> file on the client computer.
>>
>> Kind Regards,
>>
>> Holger
>>
>> --
>>
>> Holger Jakobs, Bergisch Gladbach
>>
>>

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<p dir=3D"ltr">Please let me know your inputs.</p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue=
, 13 Aug, 2024, 11:52=E2=80=AFam Wasim Devale, &lt;<a href=3D"mailto:wasimd=
60@gmail.com">wasimd60@gmail.com</a>&gt; wrote:<br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex"><p dir=3D"ltr">I did one thing, we can exclude the toast tabl=
e in the pg_dump command that has the BLOBS data for a particular table.</p=
>
<p dir=3D"ltr">--exclude-table-data=3Dpg_toast.pg_toast_10176226</p>
<p dir=3D"ltr">Thanks,<br>
Wasim</p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue=
, 13 Aug, 2024, 12:48=E2=80=AFam Holger Jakobs, &lt;<a href=3D"mailto:holge=
r@jakobs.com" target=3D"_blank" rel=3D"noreferrer">holger@jakobs.com</a>&gt=
; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .=
8ex;border-left:1px #ccc solid;padding-left:1ex">Am 12.08.24 um 21:09 schri=
eb Wasim Devale:<br>
&gt; Hi All<br>
&gt;<br>
&gt; Please let me know if the below option persists while using pg_dump <b=
r>
&gt; command:<br>
&gt;<br>
&gt; -t table_name --exclude-column column_name<br>
&gt;<br>
&gt; I have a table with a column having bytea data type (BLOBS). I just <b=
r>
&gt; want to exclude this in the dump file as it is of 99GB but I want the =
<br>
&gt; other data in the same table which is of only 22MB.<br>
&gt;<br>
&gt; Please let me know any work around=C2=A0this.<br>
&gt;<br>
&gt; I used this option in pg_dump but that didn&#39;t work:<br>
&gt;<br>
&gt; --exclude-table-data =3D table_name<br>
&gt;<br>
&gt; PG version 12.19<br>
&gt;<br>
&gt; Thanks,<br>
&gt; Wasim<br>
No, pg_dump can only dump complete tables.<br>
<br>
An alternative would be exporting the result of a select command via <br>
COPY or \copy to a file, which can easily be read again with COPY or \copy<=
br>
<br>
COPY is an SQL command and has to be used by a superuser because it <br>
writes to (or reads from) a file on the server.<br>
\copy is a psql command and thus can only be executed in psql (not any <br>
other client) and by any user, because it writes to (or reads from) a <br>
file on the client computer.<br>
<br>
Kind Regards,<br>
<br>
Holger<br>
<br>
-- <br>
<br>
Holger Jakobs, Bergisch Gladbach<br>
<br>
</blockquote></div>
</blockquote></div>

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To: Wasim Devale <wasimd60@gmail.com>
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Wasim Devale <wasimd60@gmail.com> writes:
> I did one thing, we can exclude the toast table in the pg_dump command that
> has the BLOBS data for a particular table.
> --exclude-table-data=pg_toast.pg_toast_10176226

Utterly pointless.  pg_dump does not dump toast tables as such;
it's only concerned with their parent "regular" tables.  It will
fetch data from the regular tables, and it's not concerned with
the server-side implementation detail that some of that data
might be coming out of a toast table.

			regards, tom lane





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From: Wasim Devale <wasimd60@gmail.com>
Date: Tue, 13 Aug 2024 12:12:41 +0530
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Then what might be the solution for it if I am only concerned about using
pg_dump

On Tue, 13 Aug, 2024, 12:03=E2=80=AFpm Tom Lane, <tgl@sss.pgh.pa.us> wrote:

> Wasim Devale <wasimd60@gmail.com> writes:
> > I did one thing, we can exclude the toast table in the pg_dump command
> that
> > has the BLOBS data for a particular table.
> > --exclude-table-data=3Dpg_toast.pg_toast_10176226
>
> Utterly pointless.  pg_dump does not dump toast tables as such;
> it's only concerned with their parent "regular" tables.  It will
> fetch data from the regular tables, and it's not concerned with
> the server-side implementation detail that some of that data
> might be coming out of a toast table.
>
>                         regards, tom lane
>

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<p dir=3D"ltr">Then what might be the solution for it if I am only concerne=
d about using pg_dump</p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue=
, 13 Aug, 2024, 12:03=E2=80=AFpm Tom Lane, &lt;<a href=3D"mailto:tgl@sss.pg=
h.pa.us">tgl@sss.pgh.pa.us</a>&gt; wrote:<br></div><blockquote class=3D"gma=
il_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-lef=
t:1ex">Wasim Devale &lt;<a href=3D"mailto:wasimd60@gmail.com" target=3D"_bl=
ank" rel=3D"noreferrer">wasimd60@gmail.com</a>&gt; writes:<br>
&gt; I did one thing, we can exclude the toast table in the pg_dump command=
 that<br>
&gt; has the BLOBS data for a particular table.<br>
&gt; --exclude-table-data=3Dpg_toast.pg_toast_10176226<br>
<br>
Utterly pointless.=C2=A0 pg_dump does not dump toast tables as such;<br>
it&#39;s only concerned with their parent &quot;regular&quot; tables.=C2=A0=
 It will<br>
fetch data from the regular tables, and it&#39;s not concerned with<br>
the server-side implementation detail that some of that data<br>
might be coming out of a toast table.<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 regards, tom lane<br>
</blockquote></div>

--0000000000004cd48c061f8aebe9--





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From: Ron Johnson <ronljohnsonjr@gmail.com>
Date: Tue, 13 Aug 2024 08:04:37 -0400
Message-ID: 
 <CANzqJaD7E6WR_fytkTcjHnU9nX4ktHR7WswbRUDZQdiPB+9Sqw@mail.gmail.com>
Subject: Re: pg_dump
To: Pgsql-admin <pgsql-admin@lists.postgresql.org>
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"Free your mind, and *pg_dump* will follow."  Maybe *En Vogue*, but
probably not.

On Tue, Aug 13, 2024 at 2:43=E2=80=AFAM Wasim Devale <wasimd60@gmail.com> w=
rote:

> Then what might be the solution for it if I am only concerned about using
> pg_dump
>
> On Tue, 13 Aug, 2024, 12:03=E2=80=AFpm Tom Lane, <tgl@sss.pgh.pa.us> wrot=
e:
>
>> Wasim Devale <wasimd60@gmail.com> writes:
>> > I did one thing, we can exclude the toast table in the pg_dump command
>> that
>> > has the BLOBS data for a particular table.
>> > --exclude-table-data=3Dpg_toast.pg_toast_10176226
>>
>> Utterly pointless.  pg_dump does not dump toast tables as such;
>> it's only concerned with their parent "regular" tables.  It will
>> fetch data from the regular tables, and it's not concerned with
>> the server-side implementation detail that some of that data
>> might be coming out of a toast table.
>>
>>                         regards, tom lane
>>
>

--=20
Death to America, and butter sauce.
Iraq lobster!

--0000000000008ab602061f8f6ac5
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>&quot;Free your mind, and <i>pg_dump</i> will follow.=
&quot;=C2=A0 Maybe=C2=A0<i>En Vogue</i>, but probably not.</div><br><div cl=
ass=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Aug 13, 2=
024 at 2:43=E2=80=AFAM Wasim Devale &lt;<a href=3D"mailto:wasimd60@gmail.co=
m">wasimd60@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,20=
4);padding-left:1ex"><p dir=3D"ltr">Then what might be the solution for it =
if I am only concerned about using pg_dump</p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue=
, 13 Aug, 2024, 12:03=E2=80=AFpm Tom Lane, &lt;<a href=3D"mailto:tgl@sss.pg=
h.pa.us" target=3D"_blank">tgl@sss.pgh.pa.us</a>&gt; wrote:<br></div><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex">Wasim Devale &lt;<a href=3D"mai=
lto:wasimd60@gmail.com" rel=3D"noreferrer" target=3D"_blank">wasimd60@gmail=
.com</a>&gt; writes:<br>
&gt; I did one thing, we can exclude the toast table in the pg_dump command=
 that<br>
&gt; has the BLOBS data for a particular table.<br>
&gt; --exclude-table-data=3Dpg_toast.pg_toast_10176226<br>
<br>
Utterly pointless.=C2=A0 pg_dump does not dump toast tables as such;<br>
it&#39;s only concerned with their parent &quot;regular&quot; tables.=C2=A0=
 It will<br>
fetch data from the regular tables, and it&#39;s not concerned with<br>
the server-side implementation detail that some of that data<br>
might be coming out of a toast table.<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 regards, tom lane<br>
</blockquote></div>
</blockquote></div><br clear=3D"all"><div><br></div><span class=3D"gmail_si=
gnature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_signature"><d=
iv dir=3D"ltr">Death to America, and butter sauce.<div>Iraq lobster!</div><=
/div></div></div>

--0000000000008ab602061f8f6ac5--





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From: Ron Johnson <ronljohnsonjr@gmail.com>
Date: Tue, 13 Aug 2024 08:05:33 -0400
Message-ID: 
 <CANzqJaBkG58UnKQ1OYF+PZs0WgNhrAT9fKEC3Mhewk576bzk7g@mail.gmail.com>
Subject: Re: pg_dump
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--000000000000e24546061f8f6dfc
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Oops... should have been "free your mind, and COPY will follow."

On Tue, Aug 13, 2024 at 2:43=E2=80=AFAM Wasim Devale <wasimd60@gmail.com> w=
rote:

> Then what might be the solution for it if I am only concerned about using
> pg_dump
>
> On Tue, 13 Aug, 2024, 12:03=E2=80=AFpm Tom Lane, <tgl@sss.pgh.pa.us> wrot=
e:
>
>> Wasim Devale <wasimd60@gmail.com> writes:
>> > I did one thing, we can exclude the toast table in the pg_dump command
>> that
>> > has the BLOBS data for a particular table.
>> > --exclude-table-data=3Dpg_toast.pg_toast_10176226
>>
>> Utterly pointless.  pg_dump does not dump toast tables as such;
>> it's only concerned with their parent "regular" tables.  It will
>> fetch data from the regular tables, and it's not concerned with
>> the server-side implementation detail that some of that data
>> might be coming out of a toast table.
>>
>>                         regards, tom lane
>>
>

--=20
Death to America, and butter sauce.
Iraq lobster!

--000000000000e24546061f8f6dfc
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Oops... should have been &quot;free your mind, and CO=
PY will follow.&quot;</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" =
class=3D"gmail_attr">On Tue, Aug 13, 2024 at 2:43=E2=80=AFAM Wasim Devale &=
lt;<a href=3D"mailto:wasimd60@gmail.com">wasimd60@gmail.com</a>&gt; wrote:<=
br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left:1px solid rgb(204,204,204);padding-left:1ex"><p dir=3D"ltr">T=
hen what might be the solution for it if I am only concerned about using pg=
_dump</p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue=
, 13 Aug, 2024, 12:03=E2=80=AFpm Tom Lane, &lt;<a href=3D"mailto:tgl@sss.pg=
h.pa.us" target=3D"_blank">tgl@sss.pgh.pa.us</a>&gt; wrote:<br></div><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex">Wasim Devale &lt;<a href=3D"mai=
lto:wasimd60@gmail.com" rel=3D"noreferrer" target=3D"_blank">wasimd60@gmail=
.com</a>&gt; writes:<br>
&gt; I did one thing, we can exclude the toast table in the pg_dump command=
 that<br>
&gt; has the BLOBS data for a particular table.<br>
&gt; --exclude-table-data=3Dpg_toast.pg_toast_10176226<br>
<br>
Utterly pointless.=C2=A0 pg_dump does not dump toast tables as such;<br>
it&#39;s only concerned with their parent &quot;regular&quot; tables.=C2=A0=
 It will<br>
fetch data from the regular tables, and it&#39;s not concerned with<br>
the server-side implementation detail that some of that data<br>
might be coming out of a toast table.<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 regards, tom lane<br>
</blockquote></div>
</blockquote></div><br clear=3D"all"><div><br></div><span class=3D"gmail_si=
gnature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_signature"><d=
iv dir=3D"ltr">Death to America, and butter sauce.<div>Iraq lobster!</div><=
/div></div></div>

--000000000000e24546061f8f6dfc--





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From: "David G. Johnston" <david.g.johnston@gmail.com>
Date: Tue, 13 Aug 2024 05:35:02 -0700
Message-ID: 
 <CAKFQuwYAv04Sy1zbTUq0yGc1OjXtfQsqSBesFshJj-whDd+QTA@mail.gmail.com>
Subject: Re: pg_dump
To: Wasim Devale <wasimd60@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Holger Jakobs <holger@jakobs.com>,
	"pgsql-admin@lists.postgresql.org" <pgsql-admin@lists.postgresql.org>
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On Monday, August 12, 2024, Wasim Devale <wasimd60@gmail.com> wrote:

> Then what might be the solution for it if I am only concerned about using
> pg_dump
>

Create a new table to house the bytea data, copy the bytea data to it, drop
the bytea column from the existing table.

David J.

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On Monday, August 12, 2024, Wasim Devale &lt;<a href=3D"mailto:wasimd60@gma=
il.com">wasimd60@gmail.com</a>&gt; wrote:<br><blockquote class=3D"gmail_quo=
te" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"=
><p dir=3D"ltr">Then what might be the solution for it if I am only concern=
ed about using pg_dump</p></blockquote><div><br></div><div>Create a new tab=
le to house the bytea data, copy the bytea data to it, drop the bytea colum=
n from the existing table.</div><div><br></div><div>David J.</div><div><br>=
</div>

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