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Álvaro Herrera b753be38a4 Stop creating constraints during DETACH CONCURRENTLY ... Commit 71f4c8c6f7 (which implemented DETACH CONCURRENTLY) added code to create a separate table constraint when a table is detached concurrently, identical to the partition constraint, on the theory that such a constraint was needed in case the optimizer had constructed any query plans that depended on the constraint being there. However, that theory was apparently bogus because any such plans would be invalidated. For hash partitioning, those constraints are problematic, because their expressions reference the OID of the parent partitioned table, to which the detached table is no longer related; this causes all sorts of problems (such as inability of restoring a pg_dump of that table, and the table no longer working properly if the partitioned table is later dropped). We'd like to get rid of all those constraints. In fact, for branch master, do that -- no longer create any substitute constraints. However, out of fear that some users might somehow depend on these constraints for other partitioning strategies, for stable branches (back to 14, which added DETACH CONCURRENTLY), only do it for hash partitioning. (If you repeatedly DETACH CONCURRENTLY and then ATTACH a partition, then with this constraint addition you don't need to scan the table in the ATTACH step, which presumably is good. But if users really valued this feature, they would have requested that it worked for non-concurrent DETACH also.) Author: Haiyang Li <mohen.lhy@alibaba-inc.com> Reported-by: Fei Changhong <feichanghong@qq.com> Reported-by: Haiyang Li <mohen.lhy@alibaba-inc.com> Backpatch-through: 14 Discussion: https://postgr.es/m/18371-7fef49f63de13f02@postgresql.org Discussion: https://postgr.es/m/19070-781326347ade7c57@postgresql.org		2 months ago
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backend	Stop creating constraints during DETACH CONCURRENTLY	2 months ago
bin	pgbench: Fail cleanly when finding a COPY result state	3 months ago
common	With GB18030, prevent SIGSEGV from reading past end of allocation.	8 months ago
fe_utils	In fmtIdEnc(), handle failure of enlargePQExpBuffer().	10 months ago
include	Fix description of WAL record blocks in hash_xlog.h	3 months ago
interfaces	Use SOCK_ERRNO[_SET] in fe-secure-gssapi.c.	2 months ago
makefiles	…
pl	Translation updates	4 months ago
port	Make our usage of memset_s() conform strictly to the C11 standard.	7 months ago
template	…
test	Stop creating constraints during DETACH CONCURRENTLY	2 months ago
timezone	Update time zone data files to tzdata release 2025b.	8 months ago
tools	Fix MSVC pg_upgrade test.	4 months ago
tutorial	Doc: sync src/tutorial/basics.source with SGML documentation.	3 years ago
.gitignore	…
DEVELOPERS	…
Makefile	…
Makefile.global.in	Don't put library-supplied -L/-I switches before user-supplied ones.	5 months ago
Makefile.shlib	Stop using "-multiply_defined suppress" on macOS.	2 years ago
nls-global.mk	…