Re: Execute commands in single-user mode

[Melvin Davidson <melvin6925@xxxxxxxxx>]

Well, you can't combine psql with the postgres startup, but you can issue subsequent commands from bash with the -c option:

EG:

postgres --single -O -D $PGDATA $DB_NAME

# give postgres a few seconds to complete startup

sleep 30
psql -U postgres -d your_database -c "alter table pg_largeobject set tablespace some_tablespace;"

pg_ctl stop -d $PGDATA -m fast

BTW, it's always good form to state the exact O/S and version of PostgreSQL, regardless of whether you think it may apply.

On Sun, Jan 10, 2016 at 8:53 AM, Andreas Joseph Krogh <andreas@xxxxxxxxxx> wrote:

Hi all.

 

I'm planning to move all my pg_largeobject tables to separate tablespaces and to be able to do that I need to shuddown PG and start in single-user mode, like this:

 

postgres --single -O -D $PGDATA $DB_NAME

 

Then I have to execute the command:

alter table pg_largeobject set tablespace some_tablespace;

 

Is it possible to issue the above ALTER-statement from the command-line so I can start PG in single-user mode AND execute the ALTER-statement from the command-line i a bash-loop?

 

Thanks.

 

--

Andreas Joseph Krogh

CTO / Partner - Visena AS

Mobile: +47 909 56 963

andreas@xxxxxxxxxx

www.visena.com

--

Melvin Davidson
I reserve the right to fantasize.  Whether or not you
wish to share my fantasy is entirely up to you.