Thread: table dump function

On 03/07/2013 07:58 AM, Little, Douglas wrote:
> I need a pl/pgsql function that will dump a table ddl  so I can export
> the definition to a file  before I drop the object.
>
> the psql \d command won’t work, since it doesn’t dump the table ddl, it
> just lists the table’s attributes and indexes.
>
> I’ve got the function mostly working,  but need help translating the ACL
> list into the grant commands.
>
> Are there any standard PG functions that would be useful  for creating
> the grants?


pg_dump -U some_user -t some_table -s -f some_table.sql some_database

http://www.postgresql.org/docs/9.2/interactive/app-pgdump.html
>
> Thanks in advance.
>
> *Doug Little*



--
Adrian Klaver
adrian.klaver@gmail.com

Thanks for the suggestion Adrian,

Unfortunately,  my process is executing from psql,  so to start pg_dump from within psql is a bit challenging.
We have 1 instance where we start an OS process from a function, but it's new territory for us.

My function is dumping everything but the ACL grant list.   I currently have a function that will  build and execute
thegrants from the acl list,  
so it's just a simple exercise to get it to dump the statements.

I was just  hoping that there were standard functions for doing this.
Thanks
doug

On 03/07/2013 09:42 AM, Little, Douglas wrote:
> Thanks for the suggestion Adrian,
>
> Unfortunately,  my process is executing from psql,  so to start pg_dump from within psql is a bit challenging.
> We have 1 instance where we start an OS process from a function, but it's new territory for us.
>
> My function is dumping everything but the ACL grant list.   I currently have a function that will  build and execute
thegrants from the acl list, 
> so it's just a simple exercise to get it to dump the statements.
>
> I was just  hoping that there were standard functions for doing this.
> Thanks
> doug
>
\! pg_dump... perhaps?

On 03/07/2013 08:42 AM, Little, Douglas wrote:
> Thanks for the suggestion Adrian,
>
> Unfortunately,  my process is executing from psql,  so to start pg_dump from within psql is a bit challenging.
> We have 1 instance where we start an OS process from a function, but it's new territory for us.

Yeah, my suggestion was offered in the spirit of not reinventing the
wheel:) When you say you are running from inside psql, do you mean
interactively or from script? As Rob mentioned from psql you can get to
the shell by doing \!.

>
> My function is dumping everything but the ACL grant list.   I currently have a function that will  build and execute
thegrants from the acl list, 
> so it's just a simple exercise to get it to dump the statements.
>
> I was just  hoping that there were standard functions for doing this.

Not that I know of. If you feel adventurous you could look at
dumpTableSchema in pg_dump.c in the source to see how pg_dump does it.

> Thanks
> doug
>


--
Adrian Klaver
adrian.klaver@gmail.com

Adrian,
Thank you for your comments.
This is part of our deployment framework.   DDL files are submitted to the framework, which eventually run as psql
scripts. 

thanks for the tip about pg_dump.c  I'll take a look.
I'll also look at escaping out from psql.

Thanks


-----Original Message-----
From: Adrian Klaver [mailto:adrian.klaver@gmail.com]
Sent: Thursday, March 07, 2013 12:19 PM
To: Little, Douglas
Cc: PostgreSQL General (pgsql-general@postgresql.org)
Subject: Re: [GENERAL] table dump function

On 03/07/2013 08:42 AM, Little, Douglas wrote:
> Thanks for the suggestion Adrian,
>
> Unfortunately,  my process is executing from psql,  so to start pg_dump from within psql is a bit challenging.
> We have 1 instance where we start an OS process from a function, but it's new territory for us.

Yeah, my suggestion was offered in the spirit of not reinventing the
wheel:) When you say you are running from inside psql, do you mean interactively or from script? As Rob mentioned from
psqlyou can get to the shell by doing \!. 

>
> My function is dumping everything but the ACL grant list.   I currently have a function that will  build and execute
thegrants from the acl list, 
> so it's just a simple exercise to get it to dump the statements.
>
> I was just  hoping that there were standard functions for doing this.

Not that I know of. If you feel adventurous you could look at dumpTableSchema in pg_dump.c in the source to see how
pg_dumpdoes it. 

> Thanks
> doug
>


--
Adrian Klaver
adrian.klaver@gmail.com

Adrian Klaver wrote on 07.03.2013 19:18:
> Not that I know of. If you feel adventurous you could look at
> dumpTableSchema in pg_dump.c in the source to see how pg_dump does
> it.

I think a function "pg_get_tabledef()" would be very helpful.

We already have a lot of pg_get_XXXdef() functions (pg_get_viewdef, pg_get_functiondef, ...)

I would make sense to have one for tables as well.

Regards
Thomas

On 03/07/2013 11:09 AM, Little, Douglas wrote:
> Adrian,
> Thank you for your comments.
> This is part of our deployment framework.   DDL files are submitted to the framework, which eventually run as psql
scripts.

Just out of curiosity, if you are creating the DDL, do you not already
have the schema/grant information from the previous runs?

>
> thanks for the tip about pg_dump.c  I'll take a look.
> I'll also look at escaping out from psql.
>
> Thanks
>



--
Adrian Klaver
adrian.klaver@gmail.com