postgresql/src
Álvaro Herrera 0f49586850
pg_upgrade: check for inconsistencies in not-null constraints w/inheritance
With tables defined like this,
  CREATE TABLE ip (id int PRIMARY KEY);
  CREATE TABLE ic (id int) INHERITS (ip);
  ALTER TABLE ic ALTER id DROP NOT NULL;

pg_upgrade fails during the schema restore phase due to this error:
  ERROR: column "id" in child table must be marked NOT NULL

This can only be fixed by marking the child column as NOT NULL before
the upgrade, which could take an arbitrary amount of time (because ic's
data must be scanned).  Have pg_upgrade's check mode warn if that
condition is found, so that users know what to adjust before running the
upgrade for real.

Author: Ali Akbar <the.apaan@gmail.com>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Backpatch-through: 13
Discussion: https://postgr.es/m/CACQjQLoMsE+1pyLe98pi0KvPG2jQQ94LWJ+PTiLgVRK4B=i_jg@mail.gmail.com
2025-07-04 18:05:43 +02:00
..
backend Disable commit timestamps during bootstrap 2025-07-04 15:10:22 +09:00
bin pg_upgrade: check for inconsistencies in not-null constraints w/inheritance 2025-07-04 18:05:43 +02:00
common With GB18030, prevent SIGSEGV from reading past end of allocation. 2025-05-05 04:52:08 -07:00
fe_utils In fmtIdEnc(), handle failure of enlargePQExpBuffer(). 2025-02-16 12:46:35 -05:00
include Update comment for IndexInfo.ii_NullsNotDistinct 2025-07-01 23:13:17 +02:00
interfaces Don't reduce output request size on non-Unix-socket connections. 2025-06-10 18:39:34 -04:00
makefiles Refactor DLSUFFIX handling 2022-03-25 08:56:02 +01:00
pl Run pgindent on the previous commit. 2025-06-01 14:55:24 -04:00
port Make our usage of memset_s() conform strictly to the C11 standard. 2025-05-18 12:45:55 -04:00
template On NetBSD, force dynamic symbol resolution at postmaster start. 2022-08-30 17:28:55 -04:00
test Obtain required table lock during cross-table updates, redux. 2025-07-03 13:46:07 -04:00
timezone Update time zone data files to tzdata release 2025b. 2025-04-30 11:14:10 -04:00
tools Make our usage of memset_s() conform strictly to the C11 standard. 2025-05-18 12:45:55 -04:00
tutorial Doc: sync src/tutorial/basics.source with SGML documentation. 2022-11-19 13:09:14 -05:00
.gitignore
DEVELOPERS
Makefile
Makefile.global.in Suppress macOS warnings about duplicate libraries in link commands. 2023-09-29 14:07:30 -04:00
Makefile.shlib Stop using "-multiply_defined suppress" on macOS. 2023-09-26 21:06:21 -04:00
nls-global.mk Improve frontend error logging style. 2022-04-08 14:55:14 -04:00