Is the data in your tables stored in natural correlation with those *three*
columns? I'm dubious that can even happen.
BRIN is best for *range queries* on tables who's data is added in the same
order as the key in the BRIN index (for example, a BRIN index on a timestamp
field in a log table where new records are always being appended in
"timestamp" order).
It would also be great for history tables where you can pre-sort the data
by, for example, customer_id, and then put the BRIN on customer_id.
On 2/8/23 13:58, Siddharth Jain wrote:
our insertion order is of course != index order otherwise the question
would have been trivial.
we use postgres 14
On Wed, Feb 8, 2023 at 11:51 AM Siddharth Jain <siddh...@gmail.com> wrote:
Hello,
We have large tables with billions of rows in them and want to take
advantage of the BRIN index on them.
Issues we are facing:
* as I understand, BRIN index is useful only if the data is stored
in index order. As an example we want to create a composite BRIN
index on 3 columns - integers and strings (varchar). How can we
tell Postgres to store data in index order as new records are
inserted into the database?
* i understand that turning on autosummarize will keep the index
fresh and up-to-date as new records are inserted. is this correct?
Thanks for your help.
S.
--
Born in Arizona, moved to Babylonia.
