Re: partial data migration

Yes, for whole tables (even sets of tables) "pg_dump --table=" is good at
that.  Even better, you can run the 9.6 pg_dump against the 8.3 database and
get parallelism with "--jobs".

On 3/7/19 8:11 PM, Julie Nishimura wrote:
> Ron, thanksagain. In case if I need to migrate the entire tables, I should
> be able to use pg_dump and pg_restore for certain tables, even between
> different versions, right? In case if I need to migrate from 8 to 9?
>
> Thanks
>
> ----------------------------------------------------------------------------
> *From:* Ron <ronljohnsonjr(at)gmail(dot)com>
> *Sent:* Thursday, March 7, 2019 5:59 PM
> *To:* pgsql-general(at)lists(dot)postgresql(dot)org
> *Subject:* Re: partial data migration
> (8.3?  That's even older than what we just migrated from!!!)
>
> No.  Make some views (I'd probably make them "month-sized"), COPY each
> view from the source db to a file, and then COPY each file to it's
> relevant target table.
>
> You should also think about a program named pg_bulkload.
>
> https://www.postgresql.org/docs/9.6/sql-copy.html
> https://www.postgresql.org/docs/8.3/sql-copy.html
>
>
> On 3/7/19 7:53 PM, Julie Nishimura wrote:
>> Thank you Ron! What if dev environment is on 9.6, but prod is on version
>> 8.3? Will posgtres_fdw still be the right option?
>>
>> Sent from my iPhone
>>
>> On Mar 6, 2019, at 11:57 PM, Ron <ronljohnsonjr(at)gmail(dot)com
>> <mailto:ronljohnsonjr(at)gmail(dot)com>> wrote:
>>
>>> On 3/7/19 1:54 AM, Julie Nishimura wrote:
>>>> Hello psql friends,
>>>> We need to migrate only 6 months worth of data from one instance to
>>>> another. What would be the easiest way to do it? In Oracle, I would set
>>>> up dblink. What about postgresql?
>>>
>>> postgres_fdw
>>>
>
> --
> Angular momentum makes the world go 'round.

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Angular momentum makes the world go 'round.