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From: Kirill Reshke <reshkekirill@gmail.com>
Date: Sat, 20 Dec 2025 13:58:21 +0500
Message-ID: 
 <CALdSSPj6ixZC2EaTgJU_2BNhgjsg_8665x2-pDzcEoc-PRueAA@mail.gmail.com>
Subject: Re: Add SPLIT PARTITION/MERGE PARTITIONS commands
To: Alexander Korotkov <aekorotkov@gmail.com>
Cc: zengman <zengman@halodbtech.com>,
	pgsql-hackers <pgsql-hackers@lists.postgresql.org>
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Archived-At: 
 <https://www.postgresql.org/message-id/CALdSSPj6ixZC2EaTgJU_2BNhgjsg_8665x2-pDzcEoc-PRueAA%40mail.gmail.com>
Precedence: bulk

hi!

I have been looking though git log, noticed this commit, and did small tests.

This is what I found:

```
reshke=# create table z(i int) partition by range(i);
CREATE TABLE
reshke=# create table z_1 partition of z for values from (0)to(1);
CREATE TABLE
reshke=# create table z_2 partition of z for values from (1)to(2);
CREATE TABLE
reshke=# alter table only z merge partitions (z_1,z_2) into z_12;
ALTER TABLE
reshke=#

```

IMO "alter table only ... merge partitions" does not make perfect
sense and should be rejected rather than executed. WDYT?