Re: Creation date of postgres database

On Thu, 30 Mar 2006, Michael Fuhr wrote:

> On Thu, Mar 30, 2006 at 05:20:00PM +0530, Pradeep Sharma wrote:
> > Thanks for the reply. But I guess there is some communication gap between
> > me and you regarding this topic. As I understood from your reply is, you
> > are talking about the date of Postgres setup/installation/upgrade.
>
> No, I was talking about the creation time of a particular database.
>
> > Suppose I created a new database using the command:
> >
> > CREATE DATABASE <database_name>
> >
> > I want to know how can I get created date of the above database.
>
> As I mentioned, unless you logged the CREATE DATABASE statement I
> don't think the creation date is stored anywhere, but you could
> look at the modification times of the oldest files in the database's
> directory. For example, one of my databases is named test. I can
> find that database's oid by querying pg_database:
>
> test=> SELECT oid FROM pg_database WHERE datname = 'test';
> oid
> -------
> 16388
> (1 row)
>
> I then list the files in that database's directory, sorted by time:
>
> % ls -lt $PGDATA/base/16388 | tail -2
> -rw------- 1 postgres postgres 4 Dec 6 09:39 PG_VERSION
> -rw------- 1 postgres postgres 0 Dec 6 09:39 1248
>
> From this output I infer that the test database was created on 6 Dec.
> Most files in the directory are susceptible to being modified but I
> don't think anything touches PG_VERSION, so its modification time
> should reflect the database creation time unless something at the
> OS level modifies it.
>
> Try a command like the following:
>
> % ls -lt $PGDATA/base/*/PG_VERSION
>
> You should see that each database has a copy of this file and that
> each file has a different modification time (some might be within
> a few seconds of each other if databases were created around the
> same time, such as during a restore).
>
> Is this not what you're looking for?
>
Thanks Micheal,

This solved my problem. I got the creation date of my database.

--
Pradeep

> --
> Michael Fuhr
>
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