From: | Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> |
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To: | SOzcn <selahattinozcnma(at)gmail(dot)com>, Pgsql-admin <pgsql-admin(at)lists(dot)postgresql(dot)org> |
Subject: | Re: Index - Concurrently Method |
Date: | 2024-06-12 06:38:59 |
Message-ID: | 3566ecd44c6b5d98492d9384bc97c1ddb58a125d.camel@cybertec.at |
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Lists: | pgsql-admin |
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 has partitioning?
>
> I found something, first of all, it's advised to create the indexes concurrently on your partitioning tables and then create the index on your main after this progress attach the indexes.
>
> Does anybody have any experience with this issue?
>
> 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.
>
> 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);
>
> ALTER INDEX idx_sales_2020_order_date ATTACH PARTITION idx_sales_order_date;
> ALTER INDEX idx_sales_2021_order_date ATTACH PARTITION idx_sales_order_date;
> ALTER INDEX idx_sales_2022_order_date ATTACH PARTITION idx_sales_order_date;
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_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);
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
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