On Wed, May 5, 2021 at 7:59 PM Pavel Luzanov <p.luza...@postgrespro.ru> wrote:
> I found this in the documentation, section '5.11.3. Partitioning Using 
> Inheritance'[1]:
> "Some operations require a stronger lock when using declarative partitioning 
> than when using table inheritance. For example, removing a partition from a 
> partitioned table requires taking an ACCESS EXCLUSIVE lock on the parent 
> table, whereas a SHARE UPDATE EXCLUSIVE lock is enough in the case of regular 
> inheritance."
>
> This point is no longer valid with some restrictions. If the table has a 
> default partition, then removing a partition still requires taking an ACCESS 
> EXCLUSIVE lock.
>
> May be make sense to add some details about DETACH CONCURRENTLY to the 
> section '5.11.2.2. Partition Maintenance' and completely remove this point?
>
> 1. 
> https://www.postgresql.org/docs/devel/ddl-partitioning.html#DDL-PARTITIONING-USING-INHERITANCE

That makes sense, thanks for noticing.

How about the attached?

-- 
Amit Langote
EDB: http://www.enterprisedb.com

Attachment: ddl-partitioning-note-detach-concurrenltly.patch
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