Re: Large number of partitions of a table

On 1/16/22 11:38 PM, Victor Sudakov wrote:

Tom Lane wrote:
[dd]

The specific point that depesz was responding to in that blog
was the 64K-ish limit on rangetable entries in a query.  That is
a thing, as he could have shown by using queries that weren't
amenable to plan-time pruning.  (It's also an ex-thing, having
been fixed for v15 [1]; but that doesn't help you today.)
Now, if you use no queries that can't be pruned to a few
partitions, then it's academic for you.  

The table will be partitioned `BY LIST (customer_id)` which is a unique
index. All queries will be using this index 

Good.

so no query should ever have to use more than 1 partition.

I find it hard to believe that you'll never run a report against more customers than are in a single partition.

This means basically I'm OK?