| From: | Justin Pryzby <pryzby(at)telsasoft(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org, Alexander Lakhin <exclusion(at)gmail(dot)com>, Dmitry Koval <d(dot)koval(at)postgrespro(dot)ru> |
| Subject: | Re: pg17 issues with not-null contraints |
| Date: | 2024-05-03 14:05:19 |
| Message-ID: | ZjTvH99NPNF1QY6n@pryzbyj2023 |
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| Thread: | |
| Lists: | pgsql-hackers |
On another thread [0], Alexander Lakhin pointed out, indirectly, that
partitions created using LIKE+ATTACH now have different not-null constraints
from partitions created using PARTITION OF.
postgres=# CREATE TABLE t (i int PRIMARY KEY) PARTITION BY RANGE (i);
postgres=# CREATE TABLE t1 PARTITION OF t DEFAULT ;
postgres=# \d+ t1
...
Partition of: t DEFAULT
No partition constraint
Indexes:
"t1_pkey" PRIMARY KEY, btree (i)
Access method: heap
But if it's created with LIKE:
postgres=# CREATE TABLE t1 (LIKE t);
postgres=# ALTER TABLE t ATTACH PARTITION t1 DEFAULT ;
..one also sees:
Not-null constraints:
"t1_i_not_null" NOT NULL "i"
It looks like ATTACH may have an issue with constraints implied by pkey.
[0] https://www.postgresql.org/message-id/8034d1c6-5f0e-e858-9af9-45d5e246515e%40gmail.com
--
Justin
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