This basically reverts commit d55241af70,
leaving around a portion of the regression tests still adapted with
empty relation files, and corrupted cases. This is also proving to be
failing to check properly relation files located in a non-default
tablespace path.
Per discussion with various folks, including Stephen Frost, David
Steele, Andres Freund, Michael Banck and myself.
Reported-by: Michael Banck
Discussion: https://postgr.es/m/20181021134206.GA14282@paquier.xyz
Backpatch-through: 11
The source code comments documented this, but the user-facing docs, not
so much. Add a section to Appendix B that discusses it.
In passing, improve a couple other things in Appendix B --- notably,
a long-obsolete claim that time zone abbreviations are looked up in
a fixed table.
Per bug #15527 from Michael Davidson.
Discussion: https://postgr.es/m/15527-f1be0b4dc99ebbe7@postgresql.org
In at least Apple's version of ranlib, the output file is updated to have
a mod time equal to the max of the timestamps of its components, and that
data only has seconds precision. On a filesystem with sub-second file
timestamp precision --- say, APFS --- this can result in the finished
static library appearing older than its input files, which causes useless
rebuilds and possible outright failures in parallel makes.
We've only seen this reported in the field from people using Apple's
ranlib with a non-Apple make, because Apple's make doesn't know about
sub-second timestamps either so it doesn't decide rebuilds are needed.
But Apple's ranlib presumably shares code with at least some BSDen,
so it's not that unlikely that the same problem could arise elsewhere.
To fix, just "touch" the output file after ranlib finishes.
We seem to need this in only one place. There are other calls of
ranlib in our makefiles, but they are working on intermediate files
whose timestamps are not actually important, or else on an installed
static library for which sub-second timestamp precision is unlikely
to matter either. (Also, so far as I can tell, Apple's ranlib doesn't
mess up the file timestamp in the latter usage anyhow.)
In passing, change "ranlib" to "$(RANLIB)" in one place that was
bypassing the make macro for no good reason.
Per bug #15525 from Jack Kelly (via Alyssa Ross).
Back-patch to all supported branches.
Discussion: https://postgr.es/m/15525-a30da084f17a1faa@postgresql.org
This fixes an oversight from c6c3334 which forgot that if a subset of
WAL senders are stopping and in a sync state, other WAL senders could
still be waiting for a WAL position to be synced while committing a
transaction. However the subset of stopping senders would not release
waiters, potentially breaking synchronous replication guarantees. This
commit makes sure that even WAL senders stopping are able to release
waiters and are tracked properly.
On 9.4, this can also trigger an assertion failure when setting for
example max_wal_senders to 1 where a WAL sender is not able to find
itself as in synchronous state when the instance stops.
Reported-by: Paul Guo
Author: Paul Guo, Michael Paquier
Discussion: https://postgr.es/m/CAEET0ZEv8VFqT3C-cQm6byOB4r4VYWcef1J21dOX-gcVhCSpmA@mail.gmail.com
Backpatch-through: 9.4
Move the responsibility for checking for and reporting a failure from
the only current BufFileSize() caller, logtape.c, to BufFileSize()
itself. Code within buffile.c is generally responsible for interfacing
with fd.c to report irrecoverable failures. This seems like a
convention that's worth sticking to.
Reorganizing things this way makes it easy to make the error message
raised in the event of BufFileSize() failure descriptive of the
underlying problem. We're now clear on the distinction between
temporary file name and BufFile name, and can show errno, confident that
its value actually relates to the error being reported. In passing, an
existing, similar buffile.c ereport() + errcode_for_file_access() site
is changed to follow the same conventions.
The API of the function BufFileSize() is changed by this commit, despite
already being in a stable release (Postgres 11). This seems acceptable,
since the BufFileSize() ABI was changed by commit aa55183042, which
hasn't made it into a point release yet. Besides, it's difficult to
imagine a third party BufFileSize() caller not just raising an error
anyway, since BufFile state should be considered corrupt when
BufFileSize() fails.
Per complaint from Tom Lane.
Discussion: https://postgr.es/m/26974.1540826748@sss.pgh.pa.us
Backpatch: 11-, where shared BufFiles were introduced.
Since commit 2f1d2b7a we have set PAM_RHOST to "[local]" for Unix
sockets. This caused Linux PAM's libaudit integration to make DNS
requests for that name. It's not exactly clear what value PAM_RHOST
should have in that case, but it seems clear that we shouldn't set it
to an unresolvable name, so don't do that.
Back-patch to 9.6. Bug #15520.
Author: Thomas Munro
Reviewed-by: Peter Eisentraut
Reported-by: Albert Schabhuetl
Discussion: https://postgr.es/m/15520-4c266f986998e1c5%40postgresql.org
During table rewrites (VACUUM FULL and CLUSTER), the main heap is logged
using XLOG / FPI records, and thus (correctly) ignored in decoding.
But the associated TOAST table is WAL-logged as plain INSERT records,
and so was logically decoded and passed to reorder buffer.
That has severe consequences with TOAST tables of non-trivial size.
Firstly, reorder buffer has to keep all those changes, possibly spilling
them to a file, incurring I/O costs and disk space.
Secondly, ReoderBufferCommit() was stashing all those TOAST chunks into
a hash table, which got discarded only after processing the row from the
main heap. But as the main heap is not decoded for rewrites, this never
happened, so all the TOAST data accumulated in memory, resulting either
in excessive memory consumption or OOM.
The fix is simple, as commit e9edc1ba already introduced infrastructure
(namely HEAP_INSERT_NO_LOGICAL flag) to skip logical decoding of TOAST
tables, but it only applied it to system tables. So simply use it for
all TOAST data in raw_heap_insert().
That would however solve only the memory consumption issue - the TOAST
changes would still be decoded and added to the reorder buffer, and
spilled to disk (although without TOAST tuple data, so much smaller).
But we can solve that by tweaking DecodeInsert() to just ignore such
INSERT records altogether, using XLH_INSERT_CONTAINS_NEW_TUPLE flag,
instead of skipping them later in ReorderBufferCommit().
Review: Masahiko Sawada
Discussion: https://www.postgresql.org/message-id/flat/1a17c643-e9af-3dba-486b-fbe31bc1823a%402ndquadrant.com
Backpatch: 9.4-, where logical decoding was introduced
The function generated to perform JIT compiled tuple deforming failed
when HeapTupleHeader's t_hoff was bigger than a signed int8. I'd
failed to realize that LLVM's getelementptr would treat an int8 index
argument as signed, rather than unsigned. That means that a hoff
larger than 127 would result in a negative offset being applied. Fix
that by widening the index to 32bit.
Add a testcase with a wide table. Don't drop it, as it seems useful to
verify other tools deal properly with wide tables.
Thanks to Justin Pryzby for both reporting a bug and then reducing it
to a reproducible testcase!
Reported-By: Justin Pryzby
Author: Andres Freund
Discussion: https://postgr.es/m/20181115223959.GB10913@telsasoft.com
Backpatch: 11, just as jit compilation was
Unfortunately ac218aa4f6 missed the fact that a reference to
'pg_catalog.regnamespace'::regclass wouldn't work before that type is
known. Fix that, by replacing the regtype usage with a join to
pg_type.
Reported-By: Tom Lane
Author: Andres Freund
Discussion: https://postgr.es/m/8863.1543297423@sss.pgh.pa.us
Backpatch: 9.5-, like ac218aa4f6
When the regrole (0c90f6769) and regnamespace (cb9fa802b) types were
added in 9.5, pg_upgrade's check for reg* types wasn't updated. While
regrole currently is safe, regnamespace is not.
It seems unlikely that anybody uses regnamespace inside catalog tables
across a pg_upgrade, but the tests should be correct nevertheless.
While at it, reorder the types checked in the query to be
alphabetical. Otherwise it's annoying to compare existing and tested
for types.
Author: Andres Freund
Discussion: https://postgr.es/m/037e152a-cb25-3bcb-4f35-bdc9988f8204@2ndQuadrant.com
Backpatch: 9.5-, as regrole/regnamespace
latex_escaped_print() mistranslated \ and failed to provide any translation
for # ^ and ~, all of which would typically lead to LaTeX document syntax
errors. In addition it didn't translate < > and |, which would typically
render as unexpected characters.
To some extent this represents shortcomings in ancient versions of LaTeX,
which if memory serves had no easy way to render these control characters
as ASCII text. But that's been fixed for, um, decades. In any case there
is no value in emitting guaranteed-to-fail output for these characters.
Noted while fooling with test cases added by commit 9a98984f4. Back-patch
the code change to all supported versions.
Hstore data generated on pg 8.4 and pg_upgraded to current versions
remains in its original on-disk format unless modified. The same goes
for values generated by the addon hstore-new module on pre-9.0
versions. (The hstoreUpgrade function converts old values on the fly
when read in, but the on-disk value is not modified by this.)
Since old-format empty hstores (and hstore-new hstores) have
representations compatible with the new format, hstoreUpgrade thought
it could get away without modifying such values; but this breaks
hstore_hash (and the new hstore_hash_extended) which assumes
bit-perfect matching between semantically identical hstore values.
Only one bit actually differs (the "new version" flag in the count
field) but that of course is enough to break the hash.
Fix by making hstoreUpgrade unconditionally convert all old values to
new format.
Backpatch all the way, even though this changes a hash value in some
cases, because in those cases the hash value is already failing - for
example, a hash join between old- and new-format empty hstores will be
failing to match, or a hash index on an hstore column containing an
old-format empty value will be failing to find the value since it will
be searching for a hash derived from a new-format datum. (There are no
known field reports of this happening, probably because hashing of
hstores has only been useful in limited circumstances and there
probably isn't much upgraded data being used this way.)
Per concerns arising from discussion of commit eb6f29141b. Original
bug is my fault.
Discussion: https://postgr.es/m/60b1fd3b-7332-40f0-7e7f-f2f04f777747%402ndquadrant.com
ftoi4 and its sibling coercion functions did their overflow checks in
a way that looked superficially plausible, but actually depended on an
assumption that the MIN and MAX comparison constants can be represented
exactly in the float4 or float8 domain. That fails in ftoi4, ftoi8,
and dtoi8, resulting in a possibility that values near the MAX limit will
be wrongly converted (to negative values) when they need to be rejected.
Also, because we compared before rounding off the fractional part,
the other three functions threw errors for values that really ought
to get rounded to the min or max integer value.
Fix by doing rint() first (requiring an assumption that it handles
NaN and Inf correctly; but dtoi8 and ftoi8 were assuming that already),
and by comparing to values that should coerce to float exactly, namely
INTxx_MIN and -INTxx_MIN. Also remove some random cosmetic discrepancies
between these six functions.
This back-patches commits cbdb8b4c0 and 452b637d4. In the 9.4 branch,
also back-patch the portion of 62e2a8dc2 that added PG_INTnn_MIN and
related constants to c.h, so that these functions can rely on them.
Per bug #15519 from Victor Petrovykh.
Patch by me; thanks to Andrew Gierth for analysis and discussion.
Discussion: https://postgr.es/m/15519-4fc785b483201ff1@postgresql.org
1. Integer overflow in internal_size could result in memory corruption
in decompression since a zero-length array would be allocated and then
written to. This leads to crashes or corruption when traversing an
index which has been populated with sufficiently sparse values. Fix by
using int64 for computations and checking for overflow.
2. Integer overflow in g_int_compress could cause pessimal merge
choices, resulting in unnecessarily large ranges (which would in turn
trigger issue 1 above). Fix by using int64 again.
3. Even without overflow, array sizes could become large enough to
cause unexplained memory allocation errors. Fix by capping the sizes
to a safe limit and report actual errors pointing at gist__intbig_ops
as needed.
4. Large inputs to the compression function always consist of large
runs of consecutive integers, and the compression loop was processing
these one at a time in an O(N^2) manner with a lot of overhead. The
expected runtime of this function could easily exceed 6 months for a
single call as a result. Fix by performing a linear-time first pass,
which reduces the worst case to something on the order of seconds.
Backpatch all the way, since this has been wrong forever.
Per bug #15518 from report from irc user "dymk", analysis and patch by
me.
Discussion: https://postgr.es/m/15518-799e426c3b4f8358@postgresql.org
The documentation of CREATE/ALTER ROLE has been missing two things
related to PASSWORD:
- The password value provided needs to be quoted, some places of the
documentation marked the field with quotes, but not others, which led to
confusion.
- PASSWORD NULL was not provided consistently, with ENCRYPTED being not
compatible with it.
Reported-by: Steven Winfield
Author: Michael Paquier
Reviewed-by: David G. Johnston
Discussion: https://postgr.es/m/154282901979.1316.7418475422120496802@wrigleys.postgresql.org
populate_recordset_worker() failed to consider the possibility that the
supplied JSON data contains no rows, so that update_cached_tupdesc never
got called. This led to a null-pointer dereference since commit 9a5e8ed28;
before that it led to a bogus "set-valued function called in context that
cannot accept a set" error. Fix by forcing the update to happen.
Per bug #15514. Back-patch to v11 as 9a5e8ed28 was. (If we were excited
about the bogus error, we could perhaps go back further, but it'd take more
work to figure out how to fix it in older branches. Given the lack of
field complaints about that aspect, I'm not excited.)
Discussion: https://postgr.es/m/15514-59d5b4c4065b178b@postgresql.org
Documenting INCLUDE in the section about unique indexes is confusing,
as complained of by Emilio Platzer. Furthermore, it entirely failed
to explain why you might want to use the feature. The section about
index-only scans is really the right place; it already talked about
making such things the hard way. Rewrite that text to describe INCLUDE
as the normal way to make a covering index.
Also, move that section up a couple of places, as it now seems more
important than some of the stuff we had before it. It still has to
be after expression and partial indexes, since otherwise some of it
would involve forward references.
Discussion: https://postgr.es/m/154031939560.30897.14677735588262722042@wrigleys.postgresql.org
The documentation claimed that an enum type requires "one or more"
labels, but since 1fd9883ff4, zero labels are also allowed.
Reported-by: Lukas Eder <lukas.eder@gmail.com>
Bug: #15356
Per POSIX, WIFSIGNALED and related macros are provided by <sys/wait.h>.
Apparently on Linux they're also pulled in by some other inclusions,
but BSD-ish systems are pickier. Fixes portability issue in ffa4cbd62.
Per buildfarm.
Previously, any program launched by COPY TO/FROM PROGRAM inherited the
server's setting of SIGPIPE handling, i.e. SIG_IGN. Hence, if we were
doing COPY FROM PROGRAM and closed the pipe early, the child process
would see EPIPE on its output file and typically would treat that as
a fatal error, in turn causing the COPY to report error. Similarly,
one could get a failure report from a query that didn't read all of
the output from a contrib/file_fdw foreign table that uses file_fdw's
PROGRAM option.
To fix, ensure that child programs inherit SIG_DFL not SIG_IGN processing
of SIGPIPE. This seems like an all-around better situation since if
the called program wants some non-default treatment of SIGPIPE, it would
expect to have to set that up for itself. Then in COPY, if it's COPY
FROM PROGRAM and we stop reading short of detecting EOF, treat a SIGPIPE
exit from the called program as a non-error condition. This still allows
us to report an error for any case where the called program gets SIGPIPE
on some other file descriptor.
As coded, we won't report a SIGPIPE if we stop reading as a result of
seeing an in-band EOF marker (e.g. COPY BINARY EOF marker). It's
somewhat debatable whether we should complain if the called program
continues to transmit data after an EOF marker. However, it seems like
we should avoid throwing error in any questionable cases, especially in a
back-patched fix, and anyway it would take additional code to make such
an error get reported consistently.
Back-patch to v10. We could go further back, since COPY FROM PROGRAM
has been around awhile, but AFAICS the only way to reach this situation
using core or contrib is via file_fdw, which has only supported PROGRAM
sources since v10. The COPY statement per se has no feature whereby
it'd stop reading without having hit EOF or an error already. Therefore,
I don't see any upside to back-patching further that'd outweigh the
risk of complaints about behavioral change.
Per bug #15449 from Eric Cyr.
Patch by me, review by Etsuro Fujita and Kyotaro Horiguchi
Discussion: https://postgr.es/m/15449-1cf737dd5929450e@postgresql.org
Calling AC_CHECK_DECLS before we've finished setting up the compiler's
CFLAGS seems like a pretty risky proposition, especially now that the
first use of that macro will result in a test to see whether the compiler
gives warning or error for undeclared built-in functions. That answer
could very easily get changed later than where PGAC_LLVM_SUPPORT is
called; furthermore, it's hardly unlikely that flags such as -D_GNU_SOURCE
could change visibility of declarations. Hence, be a little less cavalier
about where to do LLVM-related tests. This results in v11 and HEAD doing
the warning-or-error check at the same place in the script as older
branches are doing it, which seems like a good thing.
Per further thought about commits 0b59b0e8b and 16fbac39f.
The test case that Autoconf uses to discover whether a function has
been declared doesn't work reliably with clang, because clang reports
a warning not an error if the name is a known built-in function.
On some platforms, this results in a lot of compile-time warnings about
strlcpy and related functions not having been declared.
There is a fix for this (by Noah Misch) in the upstream Autoconf sources,
but since they've not made a release in years and show no indication of
doing so anytime soon, let's just absorb their fix directly. We can
revert this when and if we update to a newer Autoconf release.
Back-patch to all supported branches.
Discussion: https://postgr.es/m/26819.1542515567@sss.pgh.pa.us
This didn't actually work: COPY would fail to flush the right files, and
instead would try to flush a non-existing file, causing the whole
transaction to fail.
Cope by raising an error as soon as the command is sent instead, to
avoid a nasty later surprise. Of course, it would be much better to
make it work, but we don't have a patch for that yet, and we don't know
if we'll want to backpatch one when we do.
Reported-by: Tomas Vondra
Author: David Rowley
Reviewed-by: Amit Langote, Steve Singer, Tomas Vondra
On some operating systems, it doesn't make sense to retry fsync(),
because dirty data cached by the kernel may have been dropped on
write-back failure. In that case the only remaining copy of the
data is in the WAL. A subsequent fsync() could appear to succeed,
but not have flushed the data. That means that a future checkpoint
could apparently complete successfully but have lost data.
Therefore, violently prevent any future checkpoint attempts by
panicking on the first fsync() failure. Note that we already
did the same for WAL data; this change extends that behavior to
non-temporary data files.
Provide a GUC data_sync_retry to control this new behavior, for
users of operating systems that don't eject dirty data, and possibly
forensic/testing uses. If it is set to on and the write-back error
was transient, a later checkpoint might genuinely succeed (on a
system that does not throw away buffers on failure); if the error is
permanent, later checkpoints will continue to fail. The GUC defaults
to off, meaning that we panic.
Back-patch to all supported releases.
There is still a narrow window for error-loss on some operating
systems: if the file is closed and later reopened and a write-back
error occurs in the intervening time, but the inode has the bad
luck to be evicted due to memory pressure before we reopen, we could
miss the error. A later patch will address that with a scheme
for keeping files with dirty data open at all times, but we judge
that to be too complicated to back-patch.
Author: Craig Ringer, with some adjustments by Thomas Munro
Reported-by: Craig Ringer
Reviewed-by: Robert Haas, Thomas Munro, Andres Freund
Discussion: https://postgr.es/m/20180427222842.in2e4mibx45zdth5%40alap3.anarazel.de
If fsync() fails, md.c must keep the request in its bitmap, so that
future attempts will try again.
Back-patch to all supported releases.
Author: Thomas Munro
Reviewed-by: Amit Kapila
Reported-by: Andrew Gierth
Discussion: https://postgr.es/m/87y3i1ia4w.fsf%40news-spur.riddles.org.uk
Any Autoconf macro that uses AC_REQUIRES -- directly or indirectly --
must not be inside a plain shell "if" test; if it is, whatever code
gets pulled in by the AC_REQUIRES will also be inside that "if".
Instead of "if" we can use AS_IF, which knows how to get this right
(cf commit 01051a987).
The only immediate problem from getting this wrong was that AC_PROG_AWK
had to be run twice, once inside the "if llvm" block and once in the
main line. However, it broke a different patch I'm about to submit
more thoroughly.
wcsrtombs (called through wchar2char from common functions like lower,
upper, etc.) uses various optimizations that may look like access to
uninitialized data, triggering valgrind reports.
For example AVX2 instructions load data in 256-bit chunks, and gconv
does something similar with 32-bit chunks. This is faster than accessing
the bytes one by one, and the uninitialized part of the buffer is not
actually used. So suppress the bogus reports.
The exact stack depends on possible optimizations - it might be AVX, SSE
(as in the report by Aleksander Alekseev) or something else. Hence the
last frame is wildcarded, to deal with this.
Backpatch all the way back to 9.4.
Author: Tomas Vondra
Discussion: https://www.postgresql.org/message-id/flat/90ac0452-e907-e7a4-b3c8-15bd33780e62%402ndquadrant.com
Discussion: https://www.postgresql.org/message-id/20180220150838.GD18315@e733.localdomain
The comments above the PartitionedRelPruneInfo struct incorrectly
document how subplan_map and subpart_map are indexed. This seems to
have snuck in on 4e23236403.
Author: David Rowley <david.rowley@2ndquadrant.com>
With run-time partition pruning, there is no longer necessarily an
executor node for each corresponding plan node.
Author: David Rowley <david.rowley@2ndquadrant.com>
BufFileSize() can't use off_t, because it's only 32 bits wide on
some systems. BufFile objects can have many 1GB segments so the
total size can exceed 2^31. The only known client of the function
is parallel CREATE INDEX, which was reported to fail when building
large indexes on Windows.
Though this is technically an ABI break on platforms with a 32 bit
off_t and we might normally avoid back-patching it, the function is
brand new and thus unlikely to have been discovered by extension
authors yet, and it's fairly thoroughly broken on those platforms
anyway, so just fix it.
Defect in 9da0cc35. Bug #15460. Back-patch to 11, where this
function landed.
Author: Thomas Munro
Reported-by: Paul van der Linden, Pavel Oskin
Reviewed-by: Peter Geoghegan
Discussion: https://postgr.es/m/15460-b6db80de822fa0ad%40postgresql.org
Discussion: https://postgr.es/m/CAHDGBJP_GsESbTt4P3FZA8kMUKuYxjg57XHF7NRBoKnR%3DCAR-g%40mail.gmail.com
This hasn't been correct since 9.3 added "latex-longtable".
I left the phraseology "Unique abbreviations are allowed" alone.
It's correct as far as it goes, and we are studiously refraining
from specifying exactly what happens if you give a non-unique
abbreviation. (The answer in the back branches is "you get a
backwards-compatible choice", and the answer in HEAD will shortly
be "you get an error", but there seems no need to mention such
details here.)
Daniel Vérité
Discussion: https://postgr.es/m/cb7e1caf-3ea6-450d-af28-f524903a030c@manitou-mail.org
In commit ecfd55795, I removed sqlda.c's checks for ndigits != 0 on the
grounds that we should duplicate the state of the numeric value's digit
buffer even when all the digits are zeroes. However, that still isn't
quite right, because another possible state of the digit buffer is
buf == digits == NULL (this occurs for a NaN). As the code now stands,
it'll invoke memcpy with a NULL source address and zero bytecount,
which we know a few platforms crash on. Hence, reinstate the no-copy
short-circuit, but make it test specifically for buf != NULL rather than
some other condition. In hindsight, the ndigits test (added by commit
f2ae9f9c3) was almost certainly meant to fix the NaN case not the
all-zeroes case as the associated thread alleged.
As before, back-patch to all supported versions.
Discussion: https://postgr.es/m/1803D792815FC24D871C00D17AE95905C71161@g01jpexmbkw24
If a failure happens when a transaction is starting between the moment
the transaction status is changed from TRANS_DEFAULT to TRANS_START and
the moment the current user ID and security context flags are fetched
via GetUserIdAndSecContext(), or before initializing its basic fields,
then those may get reset to incorrect values when the transaction
aborts, leaving the session in an inconsistent state.
One problem reported is that failing a starting transaction at the first
query of a session could cause several kinds of system crashes on the
follow-up queries.
In order to solve that, move the initialization of the transaction state
fields and the call of GetUserIdAndSecContext() in charge of fetching
the current user ID close to the point where the transaction status is
switched to TRANS_START, where there cannot be any error triggered
in-between, per an idea of Tom Lane. This properly ensures that the
current user ID, the security context flags and that the basic fields of
TransactionState remain consistent even if the transaction fails while
starting.
Reported-by: Richard Guo
Diagnosed-By: Richard Guo
Author: Michael Paquier
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/CAN_9JTxECSb=pEPcb0a8d+6J+bDcOZ4=DgRo_B7Y5gRHJUM=Rw@mail.gmail.com
Backpatch-through: 9.4
Numeric values with leading zeroes were incorrectly copied into a
SQLDA (SQL Descriptor Area), leading to wrong results in ECPG programs.
Report and patch by Daisuke Higuchi. Back-patch to all supported
versions.
Discussion: https://postgr.es/m/1803D792815FC24D871C00D17AE95905C71161@g01jpexmbkw24
A table with OIDs that was the first in the dump output would not get
dumped with OIDs enabled. Fix that.
The reason was that the currWithOids flag was declared to be bool but
actually also takes a -1 value for "don't know yet". But under
stdbool.h semantics, that is coerced to true, so the required SET
default_with_oids command is not output again. Change the variable
type to char to fix that.
Reported-by: Derek Nelson <derek@pipelinedb.com>
group clearing mechanism.
Commits 0e141c0fbb and baaf272ac9 introduced initialization of atomic
variables in InitProcess which means that it's not safe to look at those
for backends that aren't currently in use. Fix that by initializing them
during postmaster startup.
Reported-by: Andres Freund
Author: Amit Kapila
Backpatch-through: 9.6
Discussion: https://postgr.es/m/20181027104138.qmbbelopvy7cw2qv@alap3.anarazel.de
