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Tom Lane 19de0ab23c Fix inadequate locking during get_rel_oids(). ... get_rel_oids used to not take any relation locks at all, but that stopped being a good idea with commit 3c3bb9933, which inserted a syscache lookup into the function. A concurrent DROP TABLE could now produce "cache lookup failed", which we don't want to have happen in normal operation. The best solution seems to be to transiently take a lock on the relation named by the RangeVar (which also makes the result of RangeVarGetRelid a lot less spongy). But we shouldn't hold the lock beyond this function, because we don't want VACUUM to lock more than one table at a time. (That would not be a big problem right now, but it will become one after the pending feature patch to allow multiple tables to be named in VACUUM.) In passing, adjust vacuum_rel and analyze_rel to document that we don't trust the passed RangeVar to be accurate, and allow the RangeVar to possibly be NULL --- which it is anyway for a whole-database VACUUM, though we accidentally didn't crash for that case. The passed RangeVar is in fact inaccurate when dealing with a child partition, as of v10, and it has been wrong for a whole long time in the case of vacuum_rel() recursing to a TOAST table. None of these things present visible bugs up to now, because the passed RangeVar is in fact only consulted for autovacuum logging, and in that particular context it's always accurate because autovacuum doesn't let vacuum.c expand partitions nor recurse to toast tables. Still, this seems like trouble waiting to happen, so let's nail the door at least partly shut. (Further cleanup is planned, in HEAD only, as part of the pending feature patch.) Fix some sadly inaccurate/obsolete comments too. Back-patch to v10. Michael Paquier and Tom Lane Discussion: https://postgr.es/m/25023.1506107590@sss.pgh.pa.us		8 years ago
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backend	Fix inadequate locking during get_rel_oids().	8 years ago
bin	psql: Don't try to print a partition constraint we didn't fetch.	8 years ago
common	Update copyright in recently added files	8 years ago
fe_utils	Provide a test for variable existence in psql	8 years ago
include	Add background worker type	8 years ago
interfaces	Fixed ECPG to correctly handle out-of-scope cursor declarations with pointers	8 years ago
makefiles	Always use -fPIC, not -fpic, when building shared libraries with gcc.	8 years ago
pl	Fix plperl build	8 years ago
port	Stamp HEAD as 11devel.	8 years ago
template	Remove "sco" and "unixware" ports.	9 years ago
test	psql: Update \d sequence display	8 years ago
timezone	Sync our copy of the timezone library with IANA tzcode master.	8 years ago
tools	Support building with Visual Studio 2017	8 years ago
tutorial	Distinguish selectivity of < from <= and > from >=.	8 years ago
.gitignore	…
DEVELOPERS	…
Makefile	Remove redundant coverage target	9 years ago
Makefile.global.in	Add PostgreSQL version to coverage output	8 years ago
Makefile.shlib	Remove support for bcc and msvc standalone libpq builds	9 years ago
nls-global.mk	…