Re: Move vs. copy table between databases that share a tablespace?

On 4/3/19 8:39 AM, Steven Lembark wrote:
> On Wed, 3 Apr 2019 08:33:54 -0500
> Ron <ronljohnsonjr(at)gmail(dot)com> wrote:
>
>> On 4/3/19 8:18 AM, Steven Lembark wrote:
>>> Trying to find a way of moving a large table between databases
>>> in the same cluster. There is not sufficient space to copy the
>>> contents -- the dedicated tablespace that fits the beastie is
>>> on an 80% full disk.
>>>
>>> Given that the two databases live in the same cluster and have
>>> the owner & the tablespace in common, is there any way to move
>>> the contents without a dump & reload?
>> COPY TO STDIN and pipe that through ssh to another server?
> That makes a copy. There is no place to store two copies of the
> full data on disk.

Through a pipe to a different server.

> I'm basically trying to perform the moral equivalent of what "mv"
> does in the filesystem: re-link the inode and remove the old inode
> without duplicating the data.
>
> Since the tablespace is visible to both I would get that there is
> some way to alter table... that allocates the space on disk to the
> new database w/o having to unload all 400M rows -- if it comes down
> to that I'll have to copy it into xz and load it back in the new
> database.
>

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