From: Andrew Zakharov <Andrew898@mail.ru>
To: pgsql-performance@lists.postgresql.org
Subject: Simple task with partitioning which I can't realize
Date: Tue, 1 Mar 2022 18:37:28 +0300
Message-ID: <011d01d82d82$42d20c50$c87624f0$@mail.ru> (raw)
Hello all -
I have a task which is simple at the first look. I have a table which
contains hierarchy of address objects starting with macro region end ends
with particular buildings. You can imagine how big is it.
Here is short sample of table declaration:
create table region_hierarchy(
gid uuid not null default uuid_generate_v1mc(),
parent_gid uuid null,
region_code int2,
.
constraint pk_region_hierarchy primary key (gid),
constraint fk_region_hierarchy_region_hierarchy_parent foreign key
(parent_gid) references region_hierarchy(gid)
);
Being an Oracle specialist, I planned to using same declarative partitioning
by list on the region_code field as I did in Oracle database. I've carefully
looked thru docs/faqs/google/communities and found out that I must include
"gid" field into partition key because a primary key field. Thus partition
method "by list" is not appropriate method in this case and "by range"
either. What I have left from partition methods? Hash? How can I create
partitions by gid & region_code by hash? Feasible? Will it be working
properly (with partition pruning) when search criteria is by region_code
only? Same problem appears when there is simple serial "id" used as primary
identifier. Removing all constraints is not considered. I understand that
such specific PostgreSQL partitioning implementation has done by tons of
reasons but how I can implement partitioning for my EASY case? I see the
only legacy inheritance is left, right? Very sad if it's true.
Your advices are very important.
Thanks in advance.
Andrew.
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Subject: Re: Simple task with partitioning which I can't realize
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