Re: I need to take metadata from a shell script.

[Thom Brown <thombrown@xxxxxxxxx>]

On 6 May 2010 16:52, Scott Mead <scott.mead@xxxxxxxxxxxxxxxx> wrote:

On Thu, May 6, 2010 at 11:30 AM, Thom Brown <thombrown@xxxxxxxxx> wrote:

On 6 May 2010 16:15, Andy Colson <andy@xxxxxxxxxxxxxxx> wrote:

On 5/6/2010 2:57 AM, Jaume Calm wrote:

Hi! I was searching for a command like pg_dumpall but with the
difference that I don’t want a single file for all databases, i would
like to have a file for each one.

I couldn’t fins such command, so the only option I see is to write a
shell script with a loop for all the DBs. The problem is that I’m unable
to find the way to obtain the DBs’ names in a shell script. Can someone
help me with this?

Best regards and thank you all for your time.

Depending on what version of PG you are on, try:

psql -ltA

a little read, cut, awk, perl, etc action and you should be good.

-Andy

Aha, yes, I should really look at the psql options more.

You could extend that to exclude templates and the postrgres database and database attributes:

psql -ltA | cut -d "|" -f 1 | grep -v "\( template0 \| template1 \| postgres \| : \)"

And using Scott's loop:

for line in  `psql -lt | cut -d "|" -f 1 | grep -v "\( template0 \| template1 \| postgres \| : \)" | head -n -1 `; do  pg_dump -f /home/backups/`date +\%Y\%m\%d`/"$line".sql; done

Slightly:

  for line in  `psql -t postgres -c "select datname from pg_database where datname not in ('template0','template1','postgres')" `; do  pg_dump -f /home/backups/`date +\%Y\%m\%d`/"$line".sql ; done

 

Yeah, that'll work better.  It's certainly more legible.  Could that potentially choke on database names with spaces or weird characters in do you reckon?

Thom