Andrew Dunstan [Thu, 17 Sep 2015 15:57:00 +0000 (11:57 -0400)]
Honour TEMP_CONFIG when testing pg_upgrade
This setting contains extra configuration for the temp instance, as used
in pg_regress' --temp-config flag.
Backpatch to 9.2 where test.sh was introduced.
Tom Lane [Wed, 16 Sep 2015 18:50:12 +0000 (14:50 -0400)]
Fix documentation of regular expression character-entry escapes.
The docs claimed that \uhhhh would be interpreted as a Unicode value
regardless of the database encoding, but it's never been implemented
that way: \uhhhh and \xhhhh actually mean exactly the same thing, namely
the character that pg_mb2wchar translates to 0xhhhh. Moreover we were
falsely dismissive of the usefulness of Unicode code points above FFFF.
Fix that.
It's been like this for ages, so back-patch to all supported branches.
Tom Lane [Wed, 16 Sep 2015 16:08:57 +0000 (12:08 -0400)]
Don't use "#" as an abbreviation for "number" in PL/Tcl error messages.
Also, rewrite one error message to make it follow our message style
guidelines better.
Euler Taveira and Tom Lane
Tom Lane [Wed, 16 Sep 2015 14:48:11 +0000 (10:48 -0400)]
Remove no-longer-used T_PrivGrantee node tag.
Oversight in commit
31eae6028eca4365e7165f5f33fee1ed0486aee0, which
replaced PrivGrantee nodes with RoleSpec nodes. Spotted by Yugo Nagata.
Peter Eisentraut [Wed, 16 Sep 2015 04:37:39 +0000 (00:37 -0400)]
Review program help output for wording and formatting
Stephen Frost [Tue, 15 Sep 2015 19:49:40 +0000 (15:49 -0400)]
Enforce ALL/SELECT policies in RETURNING for RLS
For the UPDATE/DELETE RETURNING case, filter the records which are not
visible to the user through ALL or SELECT policies from those considered
for the UPDATE or DELETE. This is similar to how the GRANT system
works, which prevents RETURNING unless the caller has SELECT rights on
the relation.
Per discussion with Robert, Dean, Tom, and Kevin.
Back-patch to 9.5 where RLS was introduced.
Stephen Frost [Tue, 15 Sep 2015 19:49:40 +0000 (15:49 -0400)]
RLS refactoring
This refactors rewrite/rowsecurity.c to simplify the handling of the
default deny case (reducing the number of places where we check for and
add the default deny policy from three to one) by splitting up the
retrival of the policies from the application of them.
This also allowed us to do away with the policy_id field. A policy_name
field was added for WithCheckOption policies and is used in error
reporting, when available.
Patch by Dean Rasheed, with various mostly cosmetic changes by me.
Back-patch to 9.5 where RLS was introduced to avoid unnecessary
differences, since we're still in alpha, per discussion with Robert.
Tom Lane [Tue, 15 Sep 2015 15:08:56 +0000 (11:08 -0400)]
Revert "Fix an O(N^2) problem in foreign key references".
Commit
5ddc72887a012f6a8b85707ef27d85c274faf53d does not actually work
because it will happily blow away ri_constraint_cache entries that are
in active use in outer call levels. In any case, it's a very ugly,
brute-force solution to the problem of limiting the cache size.
Revert until it can be redesigned.
Stephen Frost [Tue, 15 Sep 2015 14:56:29 +0000 (10:56 -0400)]
Add POLICY to COMMENT documentation
COMMENT supports POLICY but the documentation hadn't caught up with
that fact.
Patch by Charles Clavadetscher
Back-patch to 9.5 where POLICY was added.
Fujii Masao [Tue, 15 Sep 2015 14:21:51 +0000 (23:21 +0900)]
Improve log messages related to tablespace_map file
This patch changes the log message which is logged when the server
successfully renames backup_label file to *.old but fails to rename
tablespace_map file during the shutdown. Previously the WARNING
message "online backup mode was not canceled" was logged in that case.
However this message is confusing because the backup mode is treated
as canceled whenever backup_label is successfully renamed. So this
commit makes the server log the message "online backup mode canceled"
in that case.
Also this commit changes errdetail messages so that they follow the
error message style guide.
Back-patch to 9.5 where tablespace_map file is introduced.
Original patch by Amit Kapila, heavily modified by me.
Andrew Dunstan [Sun, 13 Sep 2015 21:06:45 +0000 (17:06 -0400)]
Fix the fastpath rule for jsonb_concat with an empty operand.
To prevent perverse results, we now only return the other operand if
it's not scalar, and if both operands are of the same kind (array or
object).
Original bug complaint and patch from Oskari Saarenmaa, extended by me
to cover the cases of different kinds of jsonb.
Backpatch to 9.5 where jsonb_concat was introduced.
Peter Eisentraut [Sun, 13 Sep 2015 03:49:11 +0000 (23:49 -0400)]
doc: Remove dead links
The web pages of Andy Dong at Berkeley don't exist anymore, and he is no
longer there.
Stephen Frost [Sat, 12 Sep 2015 21:17:03 +0000 (17:17 -0400)]
Fix typo in create_policy.sgml
WTIH -> WITH
Pointed out by Dmitriy Olshevskiy
Backpatch to 9.5 where create_policy.sgml was added.
Peter Eisentraut [Sat, 12 Sep 2015 04:07:56 +0000 (00:07 -0400)]
Update SQL features list
Bruce Momjian [Fri, 11 Sep 2015 19:51:11 +0000 (15:51 -0400)]
pg_dump, pg_upgrade: allow postgres/template1 tablespace moves
Modify pg_dump to restore postgres/template1 databases to non-default
tablespaces by switching out of the database to be moved, then switching
back.
Also, to fix potentially cases where the old/new tablespaces might not
match, fix pg_upgrade to process new/old tablespaces separately in all
cases.
Report by Marti Raudsepp
Patch by Marti Raudsepp, me
Backpatch through 9.0
Alvaro Herrera [Fri, 11 Sep 2015 18:29:46 +0000 (15:29 -0300)]
Add missing ReleaseBuffer call in BRIN revmap code
I think this particular branch is actually dead, but the analysis to
prove that is not trivial, so instead take the weasel way.
Reported by Jinyu Zhang
Backpatch to 9.5, where BRIN was introduced.
Kevin Grittner [Fri, 11 Sep 2015 18:20:17 +0000 (13:20 -0500)]
Fix an O(N^2) problem in foreign key references.
Commit
45ba424f improved foreign key lookups during bulk updates
when the FK value does not change. When restoring a schema dump
from a database with many (say 100,000) foreign keys, this cache
would grow very big and every ALTER TABLE command was causing an
InvalidateConstraintCacheCallBack(), which uses a sequential hash
table scan. This could cause a severe performance regression in
restoring a schema dump (including during pg_upgrade).
The patch uses a heuristic method of detecting when the hash table
should be destroyed and recreated.
InvalidateConstraintCacheCallBack() adds the current size of the
hash table to a counter. When that sum reaches 1,000,000, the hash
table is flushed. This fixes the regression without noticeable
harm to the bulk update use case.
Jan Wieck
Backpatch to 9.3 where the performance regression was introduced.
Fujii Masao [Fri, 11 Sep 2015 04:02:15 +0000 (13:02 +0900)]
Correct description of PageHeaderData layout in documentation
Back-patch to 9.3 where PageHeaderData layout was changed.
Michael Paquier
Peter Eisentraut [Fri, 11 Sep 2015 01:22:21 +0000 (21:22 -0400)]
doc: Spell checking
Tom Lane [Thu, 10 Sep 2015 14:23:56 +0000 (10:23 -0400)]
Fix setrefs.c comment properly.
The "typo" alleged in commit
1e460d4bd was actually a comment that was
correct when written, but I missed updating it in commit
b5282aa89.
Use a slightly less specific (and hopefully more future-proof) description
of what is collected. Back-patch to 9.2 where that commit appeared, and
revert the comment to its then-entirely-correct state before that.
Stephen Frost [Thu, 10 Sep 2015 13:22:11 +0000 (09:22 -0400)]
Fix typo in setrefs.c
We're adding OIDs, not TIDs, to invalItems.
Pointed out by Etsuro Fujita.
Back-patch to all supported branches.
Tom Lane [Thu, 10 Sep 2015 00:14:58 +0000 (20:14 -0400)]
Fix minor bug in regexp makesearch() function.
The list-wrangling here was done wrong, allowing the same state to get
put into the list twice. The following loop then would clone it twice.
The second clone would wind up with no inarcs, so that there was no
observable misbehavior AFAICT, but a useless state in the finished NFA
isn't an especially good thing.
Fujii Masao [Wed, 9 Sep 2015 13:51:44 +0000 (22:51 +0900)]
Remove files signaling a standby promotion request at postmaster startup
This commit makes postmaster forcibly remove the files signaling
a standby promotion request. Otherwise, the existence of those files
can trigger a promotion too early, whether a user wants that or not.
This removal of files is usually unnecessary because they can exist
only during a few moments during a standby promotion. However
there is a race condition: if pg_ctl promote is executed and creates
the files during a promotion, the files can stay around even after
the server is brought up to new master. Then, if new standby starts
by using the backup taken from that master, the files can exist
at the server startup and should be removed in order to avoid
an unexpected promotion.
Back-patch to 9.1 where promote signal file was introduced.
Problem reported by Feike Steenbergen.
Original patch by Michael Paquier, modified by me.
Discussion:
20150528100705[email protected]
Stephen Frost [Tue, 8 Sep 2015 21:02:53 +0000 (17:02 -0400)]
Lock all relations referred to in updatable views
Even views considered "simple" enough to be automatically updatable may
have mulitple relations involved (eg: in a where clause). We need to
make sure and lock those relations when rewriting the query.
Back-patch to 9.3 where updatable views were added.
Pointed out by Andres, patch thanks to Dean Rasheed.
Fujii Masao [Tue, 8 Sep 2015 17:25:50 +0000 (02:25 +0900)]
Add gin_fuzzy_search_limit to postgresql.conf.sample.
This was forgotten in
8a3631f (commit that originally added the parameter)
and
0ca9907 (commit that added the documentation later that year).
Back-patch to all supported versions.
Alvaro Herrera [Tue, 8 Sep 2015 14:10:20 +0000 (11:10 -0300)]
Fix error message wording in previous sslinfo commit
Noah Misch [Mon, 7 Sep 2015 23:01:00 +0000 (19:01 -0400)]
In the pg_rewind test suite, receive WAL fully before promoting.
If a transaction never reaches the standby, later tests find unexpected
cluster state. A "tail-copy: query result matches" test failure has
been the usual symptom. Among the buildfarm members having run this
test suite, most have exhibited that symptom at least once. Back-patch
to 9.5, where pg_rewind was introduced.
Michael Paquier, reported by Christoph Berg.
Alvaro Herrera [Mon, 7 Sep 2015 22:18:29 +0000 (19:18 -0300)]
Add more sanity checks in contrib/sslinfo
We were missing a few return checks on OpenSSL calls. Should be pretty
harmless, since we haven't seen any user reports about problems, and
this is not a high-traffic module anyway; still, a bug is a bug, so
backpatch this all the way back to 9.0.
Author: Michael Paquier, while reviewing another sslinfo patch
Greg Stark [Mon, 7 Sep 2015 12:35:09 +0000 (13:35 +0100)]
Change type of DOW/DOY to UNITS
Teodor Sigaev [Mon, 7 Sep 2015 14:17:15 +0000 (17:17 +0300)]
Make GIN's cleanup pending list process interruptable
Cleanup process could be called by ordinary insert/update and could take a lot
of time. Add vacuum_delay_point() to make this process interruptable. Under
vacuum this call will also throttle a vacuum process to decrease system load,
called from insert/update it will not throttle, and that reduces a latency.
Backpatch for all supported branches.
Jeff Janes
Teodor Sigaev [Mon, 7 Sep 2015 12:21:34 +0000 (15:21 +0300)]
Update site address of Snowball project
Greg Stark [Sun, 6 Sep 2015 01:04:37 +0000 (02:04 +0100)]
Move DTK_ISODOW DTK_DOW and DTK_DOY to be type UNITS rather than
RESERV. RESERV is meant for tokens like "now" and having them in that
category throws errors like these when used as an input date:
stark=# SELECT 'doy'::timestamptz;
ERROR: unexpected dtype 33 while parsing timestamptz "doy"
LINE 1: SELECT 'doy'::timestamptz;
^
stark=# SELECT 'dow'::timestamptz;
ERROR: unexpected dtype 32 while parsing timestamptz "dow"
LINE 1: SELECT 'dow'::timestamptz;
^
Found by LLVM's Libfuzzer
Tom Lane [Sat, 5 Sep 2015 20:15:38 +0000 (16:15 -0400)]
Fix CreateTableSpace() so it will compile without HAVE_SYMLINK.
This has been broken since 9.3 (commit
82b1b213cad3a69c to be exact),
which suggests that nobody is any longer using a Windows build system that
doesn't provide a symlink emulation. Still, it's wrong on its own terms,
so repair.
YUriy Zhuravlev
Heikki Linnakangas [Sat, 5 Sep 2015 08:35:49 +0000 (11:35 +0300)]
Fix misc typos.
Oskari Saarenmaa. Backpatch to stable branches where applicable.
Tatsuo Ishii [Sat, 5 Sep 2015 00:19:25 +0000 (09:19 +0900)]
Fix brin index summarizing while vacuuming.
If the number of heap blocks is not multiples of pages per range, the
summarizing produces wrong summary information for the last brin index
tuple while vacuuming.
Problem reported by Tatsuo Ishii and fixed by Amit Langote.
Discussion at "[HACKERS] BRIN INDEX value (message id :
20150903.174935.
1946402199422994347[email protected])
Backpatched to 9.5 in which brin index was added.
Tom Lane [Fri, 4 Sep 2015 17:36:49 +0000 (13:36 -0400)]
Fix subtransaction cleanup after an outer-subtransaction portal fails.
Formerly, we treated only portals created in the current subtransaction as
having failed during subtransaction abort. However, if the error occurred
while running a portal created in an outer subtransaction (ie, a cursor
declared before the last savepoint), that has to be considered broken too.
To allow reliable detection of which ones those are, add a bookkeeping
field to struct Portal that tracks the innermost subtransaction in which
each portal has actually been executed. (Without this, we'd end up
failing portals containing functions that had called the subtransaction,
thereby breaking plpgsql exception blocks completely.)
In addition, when we fail an outer-subtransaction Portal, transfer its
resources into the subtransaction's resource owner, so that they're
released early in cleanup of the subxact. This fixes a problem reported by
Jim Nasby in which a function executed in an outer-subtransaction cursor
could cause an Assert failure or crash by referencing a relation created
within the inner subtransaction.
The proximate cause of the Assert failure is that AtEOSubXact_RelationCache
assumed it could blow away a relcache entry without first checking that the
entry had zero refcount. That was a bad idea on its own terms, so add such
a check there, and to the similar coding in AtEOXact_RelationCache. This
provides an independent safety measure in case there are still ways to
provoke the situation despite the Portal-level changes.
This has been broken since subtransactions were invented, so back-patch
to all supported branches.
Tom Lane and Michael Paquier
Fujii Masao [Thu, 3 Sep 2015 13:30:16 +0000 (22:30 +0900)]
Document that max_worker_processes must be high enough in standby.
The setting values of some parameters including max_worker_processes
must be equal to or higher than the values on the master. However,
previously max_worker_processes was not listed as such parameter
in the document. So this commit adds it to that list.
Back-patch to 9.4 where max_worker_processes was added.
Noah Misch [Thu, 3 Sep 2015 04:29:11 +0000 (00:29 -0400)]
Disable fsync throughout TAP test suites.
Most suites already did so via start_test_server(), but the pg_rewind,
pg_ctl and pg_controldata suites ran a postmaster or initdb with fsync
enabled. This halves the pg_rewind suite's runtime on buildfarm member
tern. It makes tern and that machine's other buildfarm members less
vulnerable to noise failures from postmaster startup overrunning the 60s
pg_ctl timeout. Back-patch to 9.5, where pg_rewind was introduced.
Tom Lane [Tue, 1 Sep 2015 23:25:58 +0000 (19:25 -0400)]
Document that PL/Python now returns floats using repr() not str().
Commit
1ce7a57ca neglected to update the user-facing documentation,
which described the old behavior precisely.
Bruce Momjian [Tue, 1 Sep 2015 20:42:43 +0000 (16:42 -0400)]
pg_upgrade docs: clarify rsync and move verification step
These are adjustments based on someone using the new standby upgrade
steps.
Report by Andy Colson
Backpatch through 9.5
Robert Haas [Tue, 1 Sep 2015 19:30:19 +0000 (15:30 -0400)]
Allow notifications to bgworkers without database connections.
Previously, if one background worker registered another background
worker and set bgw_notify_pid while for the second background worker,
it would not receive notifications from the postmaster unless, at the
time the "parent" was registered, BGWORKER_BACKEND_DATABASE_CONNECTION
was set.
To fix, instead instead of including only those background workers that
requested database connections in the postmater's BackendList, include
them all. There doesn't seem to be any reason not do this, and indeed
it removes a significant amount of duplicated code. The other option
is to make PostmasterMarkPIDForWorkerNotify look at BackgroundWorkerList
in addition to BackendList, but that adds more code duplication instead
of getting rid of it.
Patch by me. Review and testing by Ashutosh Bapat.
Alvaro Herrera [Tue, 1 Sep 2015 17:58:28 +0000 (14:58 -0300)]
Use
in pg_upgrade's procedure
For clarity, so that the substeps are not numbered identically to the
outer procedure's steps.
Per report from Andy Colson in
http://www.postgresql.org/message-id/55D789B5.7040308@squeakycode.net
Bruce Momjian [Mon, 31 Aug 2015 21:05:22 +0000 (17:05 -0400)]
docs: remove outdated note about unique indexes
Patch by Josh Kupershmidt
Backpatch through 9.5
Bruce Momjian [Mon, 31 Aug 2015 16:24:16 +0000 (12:24 -0400)]
psql: print longtable as a possible \pset option
For some reason this message was not updated when the longtable option
was added.
Backpatch through 9.3
Magnus Hagander [Mon, 31 Aug 2015 12:07:17 +0000 (14:07 +0200)]
Small grammar fix
Josh Kupershmidt
Joe Conway [Sun, 30 Aug 2015 18:09:19 +0000 (11:09 -0700)]
Fix sepgsql regression tests.
The regression tests for sepgsql were broken by changes in the
base distro as-shipped policies. Specifically, definition of
unconfined_t in the system default policy was changed to bypass
multi-category rules, which the regression test depended on.
Fix that by defining a custom privileged domain
(sepgsql_regtest_superuser_t) and using it instead of system's
unconfined_t domain. The new sepgsql_regtest_superuser_t domain
performs almost like the current unconfined_t, but restricted by
multi-category policy as the traditional unconfined_t was.
The custom policy module is a self defined domain, and so should not
be affected by related future system policy changes. However, it still
uses the unconfined_u:unconfined_r pair for selinux-user and role.
Those definitions have not been changed for several years and seem
less risky to rely on than the unconfined_t domain. Additionally, if
we define custom user/role, they would need to be manually defined
at the operating system level, adding more complexity to an already
non-standard and complex regression test.
Back-patch to 9.3. The regression tests will need more work before
working correctly on 9.2. Starting with 9.2, sepgsql has had dependencies
on libselinux versions that are only available on newer distros with
the changed set of policies (e.g. RHEL 7.x). On 9.1 sepgsql works
fine with the older distros with original policy set (e.g. RHEL 6.x),
and on which the existing regression tests work fine. We might want
eventually change 9.1 sepgsql regression tests to be more independent
from the underlying OS policies, however more work will be needed to
make that happen and it is not clear that it is worth the effort.
Kohei KaiGai with review by Adam Brightwell and me, commentary by
Stephen, Alvaro, Tom, Robert, and others.
Tom Lane [Sat, 29 Aug 2015 20:09:25 +0000 (16:09 -0400)]
Fix s_lock.h PPC assembly code to be compatible with native AIX assembler.
On recent AIX it's necessary to configure gcc to use the native assembler
(because the GNU assembler hasn't been updated to handle AIX 6+). This
caused PG builds to fail with assembler syntax errors, because we'd try
to compile s_lock.h's gcc asm fragment for PPC, and that assembly code
relied on GNU-style local labels. We can't substitute normal labels
because it would fail in any file containing more than one inlined use of
tas(). Fortunately, that code is stable enough, and the PPC ISA is simple
enough, that it doesn't seem like too much of a maintenance burden to just
hand-code the branch offsets, removing the need for any labels.
Note that the AIX assembler only accepts "$" for the location counter
pseudo-symbol. The usual GNU convention is "."; but it appears that all
versions of gas for PPC also accept "$", so in theory this patch will not
break any other PPC platforms.
This has been reported by a few people, but Steve Underwood gets the credit
for being the first to pursue the problem far enough to understand why it
was failing. Thanks also to Noah Misch for additional testing.
Stephen Frost [Fri, 28 Aug 2015 15:39:43 +0000 (11:39 -0400)]
Ensure locks are acquired on RLS-added relations
During fireRIRrules(), get_row_security_policies can add to
securityQuals and withCheckOptions. Make sure to lock any relations
added at that point and before firing RIR rules on those expressions.
Back-patch to 9.5 where RLS was added.
Peter Eisentraut [Tue, 25 Aug 2015 13:58:49 +0000 (09:58 -0400)]
Simplify Perl chmod calls
The Perl chmod function already takes multiple file arguments, so we
don't need a separate looping function.
Bruce Momjian [Thu, 27 Aug 2015 17:43:10 +0000 (13:43 -0400)]
dblink docs: fix typo to use "connname" (3 n's), not "conname"
This makes the parameter names match the documented prototype names.
Report by Erwin Brandstetter
Backpatch through 9.0
Bruce Momjian [Wed, 26 Aug 2015 18:46:48 +0000 (14:46 -0400)]
release notes: abbreviated key speedup only for varchar/text
Report by Peter Geoghegan
Backpatch through 9.5
Bruce Momjian [Wed, 26 Aug 2015 18:40:53 +0000 (14:40 -0400)]
release notes: backpatch removal of xpath item to 9.5 tree
Backpatch
a93545e13f832d457e00420d44ccce1f88f899d4 to the 9.5 tree
Backpatch to 9.5 only
Bruce Momjian [Wed, 26 Aug 2015 14:33:02 +0000 (10:33 -0400)]
9.5 release notes: mention lack of char() sort improvements
Report by Peter Geoghegan
Backpatch through 9.5
Joe Conway [Wed, 26 Aug 2015 01:46:02 +0000 (18:46 -0700)]
Reestablish alignment of pg_controldata output.
Until 9.4, pg_controldata output was all aligned. At some point
during 9.5 development, a new item was added, namely
"Current track_commit_timestamp setting:" which is two characters
too long to be aligned with the rest of the output. Fix this by
removing the noise word "Current" and adding the requisite number
of padding spaces. Since the six preceding items are also similar
in nature, remove "Current" and pad those as well in order to
maintain overall consistency. Backpatch to 9.5 where new offending
item was added.
Tom Lane [Tue, 25 Aug 2015 23:11:17 +0000 (19:11 -0400)]
Docs: be explicit about datatype matching for lead/lag functions.
The default argument, if given, has to be of exactly the same datatype
as the first argument; but this was not stated in so many words, and
the error message you get about it might not lead your thought in the
right direction. Per bug #13587 from Robert McGehee.
A quick scan says that these are the only two built-in functions with two
anyelement arguments and no other polymorphic arguments. There are plenty
of cases of, eg, anyarray and anyelement, but those seem less likely to
confuse. For instance this doesn't seem terribly hard to figure out:
"function array_remove(integer[], numeric) does not exist". So I've
contented myself with fixing these two cases.
Tom Lane [Tue, 25 Aug 2015 15:43:37 +0000 (11:43 -0400)]
Fix potential platform dependence in gist regression test.
The results of the KNN-search test cases were indeterminate, as they asked
the system to sort pairs of points that are exactly equidistant from the
query reference point. It's a bit surprising that we've seen no
platform-specific failures from this in the buildfarm. Perhaps IEEE-float
math is well enough standardized that no such failures will ever occur on
supported platforms ... but since this entire regression test has yet to be
shipped in any non-alpha release, that seems like an unduly optimistic
assumption. Tweak the queries so that the correct output is uniquely
defined.
(The other queries in this test are also underdetermined; but it looks like
they are regurgitating index rows in insertion order, so for the moment
assume that that behavior is stable enough.)
Per Greg Stark's experiments with VAX. Back-patch to 9.5 where this test
script was introduced.
Tom Lane [Sun, 23 Aug 2015 17:02:13 +0000 (13:02 -0400)]
Avoid use of float arithmetic in bipartite_match.c.
Since the distances used in this algorithm are small integers (not more
than the size of the U set, in fact), there is no good reason to use float
arithmetic for them. Use short ints instead: they're smaller, faster, and
require no special portability assumptions.
Per testing by Greg Stark, which disclosed that the code got into an
infinite loop on VAX for lack of IEEE-style float infinities. We don't
really care all that much whether Postgres can run on a VAX anymore,
but there seems sufficient reason to change this code anyway.
In passing, make a few other small adjustments to make the code match
usual Postgres coding style a bit better.
Kevin Grittner [Sun, 23 Aug 2015 15:41:08 +0000 (10:41 -0500)]
Fix typo in C comment.
Merlin Moncure
Backpatch to 9.5, where the misspelling was introduced
Peter Eisentraut [Sun, 23 Aug 2015 01:41:29 +0000 (21:41 -0400)]
Improve whitespace
Peter Eisentraut [Sun, 23 Aug 2015 01:41:13 +0000 (21:41 -0400)]
Improve spelling
Tom Lane [Sat, 22 Aug 2015 00:32:11 +0000 (20:32 -0400)]
Avoid O(N^2) behavior when enlarging SPI tuple table in spi_printtup().
For no obvious reason, spi_printtup() was coded to enlarge the tuple
pointer table by just 256 slots at a time, rather than doubling the size at
each reallocation, as is our usual habit. For very large SPI results, this
makes for O(N^2) time spent in repalloc(), which of course soon comes to
dominate the runtime. Use the standard doubling approach instead.
This is a longstanding performance bug, so back-patch to all active
branches.
Neil Conway
Stephen Frost [Fri, 21 Aug 2015 19:51:29 +0000 (15:51 -0400)]
Clean up roles from roleattributes test
Having the roles remain after the test ends up causing repeated 'make
installcheck' runs to fail and may be risky from a security perspective
also, so remove them at the end of the test.
Alvaro Herrera [Fri, 21 Aug 2015 17:36:54 +0000 (14:36 -0300)]
Do not allow *timestamp to be passed as NULL
The code had bugs that would cause crashes if NULL was passed as that
argument (originally intended to mean not to bother returning its
value), and after inspection it turns out that nothing seems interested
in the case that *ts is NULL anyway. Therefore, remove the partial
checks intended to support that case.
Author: Michael Paquier
though I didn't include a proposed Assert.
Backpatch to 9.5.
Tom Lane [Fri, 21 Aug 2015 16:21:37 +0000 (12:21 -0400)]
Fix plpython crash when returning string representation of a RECORD result.
PLyString_ToComposite() blithely overwrote proc->result.out.d, even though
for a composite result type the other union variant proc->result.out.r is
the one that should be valid. This could result in a crash if out.r had
in fact been filled in (proc->result.is_rowtype == 1) and then somebody
later attempted to use that data; as per bug #13579 from Paweł Michalak.
Just to add insult to injury, it didn't work for RECORD results anyway,
because record_in() would refuse the case.
Fix by doing the I/O function lookup in a local PLyTypeInfo variable,
as we were doing already in PLyObject_ToComposite(). This is not a great
technique because any fn_extra data allocated by the input function will
be leaked permanently (thanks to using TopMemoryContext as fn_mcxt).
But that's a pre-existing issue that is much less serious than a crash,
so leave it to be fixed separately.
This bug would be a potential security issue, except that plpython is
only available to superusers and the crash requires coding the function
in a way that didn't work before today's patches.
Add regression test cases covering all the supported methods of converting
composite results.
Back-patch to 9.1 where the faulty coding was introduced.
Tom Lane [Fri, 21 Aug 2015 15:19:33 +0000 (11:19 -0400)]
Allow record_in() and record_recv() to work for transient record types.
If we have the typmod that identifies a registered record type, there's no
reason that record_in() should refuse to perform input conversion for it.
Now, in direct SQL usage, record_in() will always be passed typmod = -1
with type OID RECORDOID, because no typmodin exists for type RECORD, so the
case can't arise. However, some InputFunctionCall users such as PLs may be
able to supply the right typmod, so we should allow this to support them.
Note: the previous coding and comment here predate commit
59c016aa9f490b53.
There has been no case since 8.1 in which the passed type OID wouldn't be
valid; and if it weren't, this error message wouldn't be apropos anyway.
Better to let lookup_rowtype_tupdesc complain about it.
Back-patch to 9.1, as this is necessary for my upcoming plpython fix.
I'm committing it separately just to make it a bit more visible in the
commit history.
Stephen Frost [Fri, 21 Aug 2015 12:22:29 +0000 (08:22 -0400)]
Rename 'cmd' to 'cmd_name' in CreatePolicyStmt
To avoid confusion, rename CreatePolicyStmt's 'cmd' to 'cmd_name',
parse_policy_command's 'cmd' to 'polcmd', and AlterPolicy's 'cmd_datum'
to 'polcmd_datum', per discussion with Noah and as a follow-up to his
correction of copynodes/equalnodes handling of the CreatePolicyStmt
'cmd' field.
Back-patch to 9.5 where the CreatePolicyStmt was introduced, as we
are still only in alpha.
Stephen Frost [Fri, 21 Aug 2015 12:22:29 +0000 (08:22 -0400)]
In AlterRole, make bypassrls an int
When reworking bypassrls in AlterRole to operate the same way the other
attribute handling is done, I missed that the variable was incorrectly a
bool rather than an int. This meant that on platforms with an unsigned
char, we could end up with incorrect behavior during ALTER ROLE.
Pointed out by Andres thanks to tests he did changing our bool to be the
one from stdbool.h which showed this and a number of other issues.
Add regression tests to test CREATE/ALTER role for the various role
attributes. Arrange to leave roles behind for testing pg_dumpall, but
none which have the LOGIN attribute.
Back-patch to 9.5 where the AlterRole bug exists.
Peter Eisentraut [Fri, 21 Aug 2015 02:34:35 +0000 (22:34 -0400)]
doc: Whitespace and formatting fixes
Peter Eisentraut [Wed, 19 Aug 2015 15:45:52 +0000 (11:45 -0400)]
Update config.guess and config.sub
Kevin Grittner [Wed, 19 Aug 2015 13:31:13 +0000 (08:31 -0500)]
Fix bug in calculations of hash join buckets.
Commit
8cce08f168481c5fc5be4e7e29b968e314f1b41e used a left-shift
on a literal of 1 that could (in large allocations) be shifted by
31 or more bits. This was assigned to a local variable that was
already declared to be a long to protect against overruns of int,
but the literal in this shift needs to be declared long to allow it
to work correctly in some compilers.
Backpatch to 9.5, where the bug was introduced.
Report and patch by KaiGai Kohei, slighly modified based on
discussion.
Tom Lane [Tue, 18 Aug 2015 23:22:37 +0000 (19:22 -0400)]
Fix a few bogus statement type names in plpgsql error messages.
plpgsql's error location context messages ("PL/pgSQL function fn-name line
line-no at stmt-type") would misreport a CONTINUE statement as being an
EXIT, and misreport a MOVE statement as being a FETCH. These are clear
bugs that have been there a long time, so back-patch to all supported
branches.
In addition, in 9.5 and HEAD, change the description of EXECUTE from
"EXECUTE statement" to just plain EXECUTE; there seems no good reason why
this statement type should be described differently from others that have
a well-defined head keyword. And distinguish GET STACKED DIAGNOSTICS from
plain GET DIAGNOSTICS. These are a bit more of a judgment call, and also
affect existing regression-test outputs, so I did not back-patch into
stable branches.
Pavel Stehule and Tom Lane
Robert Haas [Tue, 18 Aug 2015 16:49:04 +0000 (12:49 -0400)]
psql: Make EXECUTE PROCEDURE tab completion a bit narrower.
If the user has typed GRANT EXECUTE, the correct completion is "ON",
not "PROCEDURE".
Daniel Verite
Andres Freund [Mon, 17 Aug 2015 09:15:46 +0000 (11:15 +0200)]
Improve configure test for the sse4.2 crc instruction.
With optimizations enabled at least one compiler, clang 3.7, optimized
away the crc intrinsics knowing that the result went on unused and has
no side effects. That can trigger errors in code generation when the
intrinsic is used, as we chose to use the intrinsics without any
additional compiler flag. Return the computed value to prevent that.
With some more pedantic warning flags (-Wold-style-definition) the
configure test failed to recognize the existence of _mm_crc32_u*
intrinsics due to an independent warning in the test because the test
turned on -Werror, but that's not actually needed here.
Discussion:
20150814092039[email protected]
Backpatch: 9.5, where the use of crc intrinsics was integrated.
Tom Lane [Sat, 15 Aug 2015 18:31:04 +0000 (14:31 -0400)]
Add docs about postgres_fdw's setting of search_path and other GUCs.
This behavior wasn't documented, but it should be because it's user-visible
in triggers and other functions executed on the remote server.
Per question from Adam Fuchs.
Back-patch to 9.3 where postgres_fdw was added.
Tom Lane [Sat, 15 Aug 2015 17:30:16 +0000 (13:30 -0400)]
Improve documentation about MVCC-unsafe utility commands.
The table-rewriting forms of ALTER TABLE are MVCC-unsafe, in much the same
way as TRUNCATE, because they replace all rows of the table with newly-made
rows with a new xmin. (Ideally, concurrent transactions with old snapshots
would continue to see the old table contents, but the data is not there
anymore --- and if it were there, it would be inconsistent with the table's
updated rowtype, so there would be serious implementation problems to fix.)
This was nowhere documented though, and the problem was only documented for
TRUNCATE in a note in the TRUNCATE reference page. Create a new "Caveats"
section in the MVCC chapter that can be home to this and other limitations
on serializable consistency.
In passing, fix a mistaken statement that VACUUM and CLUSTER would reclaim
space occupied by a dropped column. They don't reconstruct existing tuples
so they couldn't do that.
Back-patch to all supported branches.
Tom Lane [Sat, 15 Aug 2015 16:00:36 +0000 (12:00 -0400)]
Repair unsafe use of shared typecast-lookup table in plpgsql DO blocks.
DO blocks use private simple_eval_estates to avoid intra-transaction memory
leakage, cf commit
c7b849a89. I had forgotten about that while writing
commit
0fc94a5ba, but it means that expression execution trees created
within a DO block disappear immediately on exiting the DO block, and hence
can't safely be linked into plpgsql's session-wide cast hash table.
To fix, give a DO block a private cast hash table to go with its private
simple_eval_estate. This is less efficient than one could wish, since
DO blocks can no longer share any cast lookup work with other plpgsql
execution, but it shouldn't be too bad; in any case it's no worse than
what happened in DO blocks before commit
0fc94a5ba.
Per bug #13571 from Feike Steenbergen. Preliminary analysis by
Oleksandr Shulgin.
Andres Freund [Sat, 15 Aug 2015 15:02:47 +0000 (17:02 +0200)]
Correct type of waitMode variable in ExecInsertIndexTuples().
It was a bool, even though it should be CEOUC_WAIT_MODE. That's unlikely
to have a negative effect with the current definition of bool (char),
but it's definitely wrong.
Discussion:
20150812084351[email protected]
Backpatch: 9.5, where ON CONFLICT was merged
Andres Freund [Wed, 12 Aug 2015 14:49:36 +0000 (16:49 +0200)]
vacuumdb: Don't assign negative values to a boolean.
Since
a17923204736 (vacuumdb: enable parallel mode) -1 has been assigned
to a boolean. That can, justifiedly, trigger compiler warnings. There's
also no need for ternary logic, result was only ever set to 0 or -1. So
don't.
Discussion:
20150812084351[email protected]
Backpatch: 9.5
Andres Freund [Wed, 12 Aug 2015 14:02:20 +0000 (16:02 +0200)]
Don't use 'bool' as a struct member name in help_config.c.
Doing so doesn't work if bool is a macro rather than a typedef.
Although c.h spends some effort to support configurations where bool is
a preexisting macro, help_config.c has existed this way since
2003 (b700a6), and there have not been any reports of
problems. Backpatch anyway since this is as riskless as it gets.
Discussion:
20150812084351[email protected]
Backpatch: 9.0-master
Andres Freund [Wed, 12 Aug 2015 13:52:10 +0000 (15:52 +0200)]
Use the correct type for TableInfo->relreplident.
Mistakenly relreplident was stored as a bool. That works today as c.h
typedefs bool to a char, but isn't very future proof.
Discussion:
20150812084351[email protected]
Backpatch: 9.4 where replica identity was introduced.
Noah Misch [Sat, 15 Aug 2015 00:23:13 +0000 (20:23 -0400)]
Encoding PG_UHC is code page 949.
This fixes presentation of non-ASCII messages to the Windows event log
and console in rare cases involving Korean locale. Processes like the
postmaster and checkpointer, but not processes attached to databases,
were affected. Back-patch to 9.4, where MessageEncoding was introduced.
The problem exists in all supported versions, but this change has no
effect in the absence of the code recognizing PG_UHC MessageEncoding.
Noticed while investigating bug #13427 from Dmitri Bourlatchkov.
Noah Misch [Sat, 15 Aug 2015 00:23:09 +0000 (20:23 -0400)]
Restore old pgwin32_message_to_UTF16() behavior outside transactions.
Commit
49c817eab78c6f0ce8c3bf46766b73d6cf3190b7 replaced with a hard
error the dubious pg_do_encoding_conversion() behavior when outside a
transaction. Reintroduce the historic soft failure locally within
pgwin32_message_to_UTF16(). This fixes errors when writing messages in
less-common encodings to the Windows event log or console. Back-patch
to 9.4, where the aforementioned commit first appeared.
Per bug #13427 from Dmitri Bourlatchkov.
Peter Eisentraut [Fri, 14 Aug 2015 16:10:35 +0000 (12:10 -0400)]
Update key words table for 9.5
Alvaro Herrera [Thu, 13 Aug 2015 22:28:54 +0000 (19:28 -0300)]
MSVC: Exclude 'brin' contrib module
The build script is not able to parse the Makefile, so remove it.
Alvaro Herrera [Thu, 13 Aug 2015 17:41:52 +0000 (14:41 -0300)]
Re-add BRIN isolation test
This time, instead of using a core isolation test, put it on its own
test module; this way it can require the pageinspect module to be
present before running.
The module's Makefile is loosely modeled after test_decoding's, so that
it's easy to add further tests for either pg_regress or isolationtester
later.
Backpatch to 9.5.
Tom Lane [Thu, 13 Aug 2015 17:25:01 +0000 (13:25 -0400)]
Improve regression test case to avoid depending on system catalog stats.
In commit
95f4e59c32866716 I added a regression test case that examined
the plan of a query on system catalogs. That isn't a terribly great idea
because the catalogs tend to change from version to version, or even
within a version if someone makes an unrelated regression-test change that
populates the catalogs a bit differently. Usually I try to make planner
test cases rely on test tables that have not changed since Berkeley days,
but I got sloppy in this case because the submitted crasher example queried
the catalogs and I didn't spend enough time on rewriting it. But it was a
problem waiting to happen, as I was rudely reminded when I tried to port
that patch into Salesforce's Postgres variant :-(. So spend a little more
effort and rewrite the query to not use any system catalogs. I verified
that this version still provokes the Assert if
95f4e59c32866716's code fix
is reverted.
I also removed the EXPLAIN output from the test, as it turns out that the
assertion occurs while considering a plan that isn't the one ultimately
selected anyway; so there's no value in risking any cross-platform
variation in that printout.
Back-patch to 9.2, like the previous patch.
Alvaro Herrera [Thu, 13 Aug 2015 16:02:10 +0000 (13:02 -0300)]
Use materialize SRF mode in brin_page_items
This function was using the single-value-per-call mechanism, but the
code relied on a relcache entry that wasn't kept open across calls.
This manifested as weird errors in buildfarm during the short time that
the "brin-1" isolation test lived.
Backpatch to 9.5, where it was introduced.
Michael Meskes [Thu, 13 Aug 2015 11:22:29 +0000 (13:22 +0200)]
Fix declaration of isarray variable.
Found and fixed by Andres Freund.
Alvaro Herrera [Thu, 13 Aug 2015 03:12:07 +0000 (00:12 -0300)]
Fix unitialized variables
As complained by clang, reported by Andres Freund. Brown paper bag bug
in
ccc4c074994d.
Add some comments, too.
Backpatch to 9.5, like that one.
Tom Lane [Thu, 13 Aug 2015 01:18:45 +0000 (21:18 -0400)]
Undo mistaken tightening in join_is_legal().
One of the changes I made in commit
8703059c6b55c427 turns out not to have
been such a good idea: we still need the exception in join_is_legal() that
allows a join if both inputs already overlap the RHS of the special join
we're checking. Otherwise we can miss valid plans, and might indeed fail
to find a plan at all, as in recent report from Andreas Seltenreich.
That code was added way back in commit
c17117649b9ae23d, but I failed to
include a regression test case then; my bad. Put it back with a better
explanation, and a test this time. The logic does end up a bit different
than before though: I now believe it's appropriate to make this check
first, thereby allowing such a case whether or not we'd consider the
previous SJ(s) to commute with this one. (Presumably, we already decided
they did; but it was confusing to have this consideration in the middle
of the code that was handling the other case.)
Back-patch to all active branches, like the previous patch.
Alvaro Herrera [Wed, 12 Aug 2015 17:20:38 +0000 (14:20 -0300)]
Close some holes in BRIN page assignment
In some corner cases, it is possible for the BRIN index relation to be
extended by brin_getinsertbuffer but the new page not be used
immediately for anything by its callers; when this happens, the page is
initialized and the FSM is updated (by brin_getinsertbuffer) with the
info about that page, but these actions are not WAL-logged. A later
index insert/update can use the page, but since the page is already
initialized, the initialization itself is not WAL-logged then either.
Replay of this sequence of events causes recovery to fail altogether.
There is a related corner case within brin_getinsertbuffer itself, in
which we extend the relation to put a new index tuple there, but later
find out that we cannot do so, and do not return the buffer; the page
obtained from extension is not even initialized. The resulting page is
lost forever.
To fix, shuffle the code so that initialization is not the
responsibility of brin_getinsertbuffer anymore, in normal cases;
instead, the initialization is done by its callers (brin_doinsert and
brin_doupdate) once they're certain that the page is going to be used.
When either those functions determine that the new page cannot be used,
before bailing out they initialize the page as an empty regular page,
enter it in FSM and WAL-log all this. This way, the page is usable for
future index insertions, and WAL replay doesn't find trying to insert
tuples in pages whose initialization didn't make it to the WAL. The
same strategy is used in brin_getinsertbuffer when it cannot return the
new page.
Additionally, add a new step to vacuuming so that all pages of the index
are scanned; whenever an uninitialized page is found, it is initialized
as empty and WAL-logged. This closes the hole that the relation is
extended but the system crashes before anything is WAL-logged about it.
We also take this opportunity to update the FSM, in case it has gotten
out of date.
Thanks to Heikki Linnakangas for finding the problem that kicked some
additional analysis of BRIN page assignment code.
Backpatch to 9.5, where BRIN was introduced.
Discussion: https://www.postgresql.org/message-id/
20150723204810[email protected]
Andres Freund [Wed, 12 Aug 2015 15:09:35 +0000 (17:09 +0200)]
Handle PQresultErrorField(PG_DIAG_SQLSTATE) returning NULL in streamutil.c.
In
ff27db5d I missed that PQresultErrorField() may return NULL if
there's no sqlstate associated with an error.
Spotted-By: Coverity
Reported-By: Michael Paquier
Discussion: CAB7nPqQ3o10SY6NVdU4pjq85GQTN5tbbkq2gnNUh2fBNU3rKyQ@mail.gmail.com
Backpatch: 9.5, like
ff27db5d
Andres Freund [Wed, 12 Aug 2015 15:09:34 +0000 (17:09 +0200)]
Fix two off-by-one errors in bufmgr.c.
In
4b4b680c I passed a buffer index number (starting from 0) instead of
a proper Buffer id (which start from 1 for shared buffers) in two
places.
This wasn't noticed so far as one of those locations isn't compiled at
all (PrintPinnedBufs) and the other one (InvalidBuffer) requires a
unlikely, but possible, set of circumstances to trigger a symptom.
To reduce the likelihood of such incidents a bit also convert existing
open coded mappings from buffer descriptors to buffer ids with
BufferDescriptorGetBuffer().
Author: Qingqing Zhou
Reported-By: Qingqing Zhou
Discussion: CAJjS0u2ai9ooUisKtkV8cuVUtEkMTsbK8c7juNAjv8K11zeCQg@mail.gmail.com
Backpatch: 9.5 where the private ref count infrastructure was introduced
Tom Lane [Wed, 12 Aug 2015 04:48:11 +0000 (00:48 -0400)]
Fix some possible low-memory failures in regexp compilation.
newnfa() failed to set the regex error state when malloc() fails.
Several places in regcomp.c failed to check for an error after calling
subre(). Each of these mistakes could lead to null-pointer-dereference
crashes in memory-starved backends.
Report and patch by Andreas Seltenreich. Back-patch to all branches.
Andres Freund [Tue, 11 Aug 2015 10:32:49 +0000 (12:32 +0200)]
Minor cleanups in slot related code.
Fix a bunch of typos, and remove two superflous includes.
Author: Gurjeet Singh
Discussion: CABwTF4Wh_dBCzTU=49pFXR6coR4NW1ynb+vBqT+Po=7fuq5iCw@mail.gmail.com
Backpatch: 9.4
Tom Lane [Tue, 11 Aug 2015 00:10:15 +0000 (20:10 -0400)]
Fix privilege dumping from servers too old to have that type of privilege.
pg_dump produced fairly silly GRANT/REVOKE commands when dumping types from
pre-9.2 servers, and when dumping functions or procedural languages from
pre-7.3 servers. Those server versions lack the typacl, proacl, and/or
lanacl columns respectively, and pg_dump substituted default values that
were in fact incorrect. We ended up revoking all the owner's own
privileges for the object while granting all privileges to PUBLIC.
Of course the owner would then have those privileges again via PUBLIC, so
long as she did not try to revoke PUBLIC's privileges; which may explain
the lack of field reports. Nonetheless this is pretty silly behavior.
The stakes were raised by my recent patch to make pg_dump dump shell types,
because 9.2 and up pg_dump would proceed to emit bogus GRANT/REVOKE
commands for a shell type if dumping from a pre-9.2 server; and the server
will not accept GRANT/REVOKE commands for a shell type. (Perhaps it
should, but that's a topic for another day.) So the resulting dump script
wouldn't load without errors.
The right thing to do is to act as though these objects have default
privileges (null ACL entries), which causes pg_dump to print no
GRANT/REVOKE commands at all for them. That fixes the silly results
and also dodges the problem with shell types.
In passing, modify getProcLangs() to be less creatively different about
how to handle missing columns when dumping from older server versions.
Every other data-acquisition function in pg_dump does that by substituting
appropriate default values in the version-specific SQL commands, and I see
no reason why this one should march to its own drummer. Its use of
"SELECT *" was likewise not conformant with anyplace else, not to mention
it's not considered good SQL style for production queries.
Back-patch to all supported versions. Although 9.0 and 9.1 pg_dump don't
have the issue with typacl, they are more likely than newer versions to be
used to dump from ancient servers, so we ought to fix the proacl/lanacl
issues all the way back.
Tom Lane [Mon, 10 Aug 2015 21:34:51 +0000 (17:34 -0400)]
Accept alternate spellings of __sparcv7 and __sparcv8.
Apparently some versions of gcc prefer __sparc_v7__ and __sparc_v8__.
Per report from Waldemar Brodkorb.
Tom Lane [Mon, 10 Aug 2015 21:18:17 +0000 (17:18 -0400)]
Further mucking with PlaceHolderVar-related restrictions on join order.
Commit
85e5e222b1dd02f135a8c3bf387d0d6d88e669bd turns out not to have taken
care of all cases of the partially-evaluatable-PlaceHolderVar problem found
by Andreas Seltenreich's fuzz testing. I had set it up to check for risky
PHVs only in the event that we were making a star-schema-based exception to
the param_source_rels join ordering heuristic. However, it turns out that
the problem can occur even in joins that satisfy the param_source_rels
heuristic, in which case allow_star_schema_join() isn't consulted.
Refactor so that we check for risky PHVs whenever the proposed join has
any remaining parameterization.
Back-patch to 9.2, like the previous patch (except for the regression test
case, which only works back to 9.3 because it uses LATERAL).
Note that this discovery implies that problems of this sort could've
occurred in 9.2 and up even before the star-schema patch; though I've not
tried to prove that experimentally.
Tom Lane [Mon, 10 Aug 2015 14:22:37 +0000 (10:22 -0400)]
Temporarily(?) remove BRIN isolation test.
Commit
2834855cb added a not-very-carefully-thought-out isolation test
to check a BRIN index bug fix. The test depended on the availability
of the pageinspect contrib module, which meant it did not work in
several common testing scenarios such as "make check-world". It's not
clear whether we want a core test depending on a contrib module like
that, but in any case, failing to deal with the possibility that the
module isn't present in the installation-under-test is not acceptable.
Remove that test pending some better solution.
Andres Freund [Mon, 10 Aug 2015 11:28:19 +0000 (13:28 +0200)]
Fix copy & paste mistake in pg_get_replication_slots().
XLogRecPtr was compared with InvalidTransactionId instead of
InvalidXLogRecPtr. As both are defined to the same value this doesn't
cause any actual problems, but it's still wrong.
Backpatch: 9.4-master, bug was introduced in 9.4