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* Reading on how materialized views are materialized?
@ 2018-06-22 18:51 Wells Oliver <wells.oliver@gmail.com>
0 siblings, 1 reply; 2+ messages in thread
From: Wells Oliver @ 2018-06-22 18:51 UTC (permalink / raw)
To: pgsql-admin
Where can I find some more detail? I am deciding between a flat table
populated for the current month only with a script versus a materialized
view, and I'd like to understand better if the latter is intelligently
being refreshed (meaning years of data won't be re-populated, only what's
changed).
Thanks.
--
Wells Oliver
wells.oliver@gmail.com <wellsoliver@gmail.com>
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Reading on how materialized views are materialized?
@ 2018-06-25 06:23 Thomas Kellerer <spam_eater@gmx.net>
parent: Wells Oliver <wells.oliver@gmail.com>
0 siblings, 0 replies; 2+ messages in thread
From: Thomas Kellerer @ 2018-06-25 06:23 UTC (permalink / raw)
To: pgsql-admin@lists.postgresql.org
Wells Oliver schrieb am 22.06.2018 um 20:51:
> Where can I find some more detail? I am deciding between a flat table
> populated for the current month only with a script versus a
> materialized view, and I'd like to understand better if the latter is
> intelligently being refreshed (meaning years of data won't be
> re-populated, only what's changed).
MViews currently don't support "incremental" refresh in Postgres.
A refresh of a mview is essentially the same as:
truncate table foo;
insert into foo
select ...
from ....;
Where the SELECT part is the query used to define the mview.
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2018-06-22 18:51 Reading on how materialized views are materialized? Wells Oliver <wells.oliver@gmail.com>
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