On Mon, Mar 14, 2016 at 3:05 PM, David Rowley <david.row...@2ndquadrant.com>
wrote:
>
> Things to try:
> 1. alter table a add column ts_date date; update a set ts_date =
> date_trunc('DAY',ts); vacuum full analyze ts;
> 2. or, create index on a (date_trunc('DAY',ts)); analyze a;
> 3. or for testing, set the work_mem higher.
>
>
Ah, that makes sense.
Tried with a BTREE index, and it works as perfectly but the index is 428MB
- which is a bit rough.
Removed that and put on a BRIN index, same result for 48kB - perfect!
Thanks for the help,
James
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