Message-ID: <3566ecd44c6b5d98492d9384bc97c1ddb58a125d.camel@cybertec.at>
Subject: Re: Index - Concurrently Method
From: Laurenz Albe <laurenz.albe@cybertec.at>
To: SOzcn <selahattinozcnma@gmail.com>, Pgsql-admin
	 <pgsql-admin@lists.postgresql.org>
Date: Wed, 12 Jun 2024 08:38:59 +0200
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On Wed, 2024-06-12 at 00:15 +0300, SOzcn wrote:
> Is there any other way to use the concurrent method on the table which =
=C2=A0has partitioning?
>=20
> I found something, first of all, it's advised to create the indexes concu=
rrently on your partitioning tables and then create the index on your main =
after this progress attach the indexes.=20
>=20
> Does anybody have any experience with this issue?
>=20
> I leave the example in the belong. Is that way healthy? At the last time,=
 we gonna create on the main table anyway. So it's kinda confusing me.
>=20
> By Example;
> CREATE INDEX CONCURRENTLY idx_sales_2020_order_date ON sales_2020 (order_=
date);
> CREATE INDEX CONCURRENTLY idx_sales_2021_order_date ON sales_2021 (order_=
date);
> CREATE INDEX CONCURRENTLY idx_sales_2022_order_date ON sales_2022 (order_=
date);
>=20
> ALTER INDEX idx_sales_2020_order_date ATTACH PARTITION idx_sales_order_da=
te;
> ALTER INDEX idx_sales_2021_order_date ATTACH PARTITION idx_sales_order_da=
te;
> ALTER INDEX idx_sales_2022_order_date ATTACH PARTITION idx_sales_order_da=
te;

No, there is no other way.  But the commands you quote seem to be the wrong
way around.  It should be:

CREATE INDEX idx_sales_order_date ON ONLY sales (order_date);

CREATE INDEX CONCURRENTLY idx_sales_2020_order_date ON sales_2020 (order_da=
te);
CREATE INDEX CONCURRENTLY idx_sales_2021_order_date ON sales_2021 (order_da=
te);
CREATE INDEX CONCURRENTLY idx_sales_2022_order_date ON sales_2022 (order_da=
te);

ALTER INDEX idx_sales_order_date ATTACH PARTITION idx_sales_2020_order_date=
;
ALTER INDEX idx_sales_order_date ATTACH PARTITION idx_sales_2021_order_date=
;
ALTER INDEX idx_sales_order_date ATTACH PARTITION idx_sales_2022_order_date=
;

Yours,
Laurenz Albe