commit : ba37ac217791dfdf2b327c4b75e7083b6b03a2f5 author : Tom Lane <firstname.lastname@example.org> date : Mon, 9 May 2016 16:50:23 -0400 committer: Tom Lane <email@example.com> date : Mon, 9 May 2016 16:50:23 -0400
commit : e51547e05a44101667ef277c89319647e52c0f62 author : Peter Eisentraut <firstname.lastname@example.org> date : Mon, 9 May 2016 10:05:46 -0400 committer: Peter Eisentraut <email@example.com> date : Mon, 9 May 2016 10:05:46 -0400
Source-Git-URL: git://git.postgresql.org/git/pgtranslation/messages.git Source-Git-Hash: 7a7a803d44fad7952cf6b1a1da29df2b06b1b380
Release notes for 9.5.3, 9.4.8, 9.3.13, 9.2.17, 9.1.22.
commit : 828fe491488b170f6f2952ef794178969f2aa206 author : Tom Lane <firstname.lastname@example.org> date : Sat, 7 May 2016 17:26:24 -0400 committer: Tom Lane <email@example.com> date : Sat, 7 May 2016 17:26:24 -0400
Docs: improve warnings about nextval() not producing gapless sequences.
commit : 673bceaf3f24a7a3d3ed346d07cedc6524ad888d author : Tom Lane <firstname.lastname@example.org> date : Sat, 7 May 2016 13:16:50 -0400 committer: Tom Lane <email@example.com> date : Sat, 7 May 2016 13:16:50 -0400
In the documentation for nextval(), point out explicitly that INSERT ... ON CONFLICT will call nextval() if needed for the insertion case, whether or not it ends up following the ON CONFLICT path. This seems to be a matter of some confusion, cf bug #14126, so let's be clear about it. Also mention the issue in the CREATE SEQUENCE reference page, since that is another place where people might expect such things to be covered. Minor wording improvements nearby, as well. Back-patch to 9.5 where ON CONFLICT was introduced.
Distrust external OpenSSL clients; clear err queue
commit : a3c17b2af89cd46b47df3483bb693312d7521795 author : Peter Eisentraut <firstname.lastname@example.org> date : Fri, 8 Apr 2016 13:48:14 -0400 committer: Peter Eisentraut <email@example.com> date : Fri, 8 Apr 2016 13:48:14 -0400
OpenSSL has an unfortunate tendency to mix per-session state error handling with per-thread error handling. This can cause problems when programs that link to libpq with OpenSSL enabled have some other use of OpenSSL; without care, one caller of OpenSSL may cause problems for the other caller. Backend code might similarly be affected, for example when a third party extension independently uses OpenSSL without taking the appropriate precautions. To fix, don't trust other users of OpenSSL to clear the per-thread error queue. Instead, clear the entire per-thread queue ahead of certain I/O operations when it appears that there might be trouble (these I/O operations mostly need to call SSL_get_error() to check for success, which relies on the queue being empty). This is slightly aggressive, but it's pretty clear that the other callers have a very dubious claim to ownership of the per-thread queue. Do this is both frontend and backend code. Finally, be more careful about clearing our own error queue, so as to not cause these problems ourself. It's possibly that control previously did not always reach SSLerrmessage(), where ERR_get_error() was supposed to be called to clear the queue's earliest code. Make sure ERR_get_error() is always called, so as to spare other users of OpenSSL the possibility of similar problems caused by libpq (as opposed to problems caused by a third party OpenSSL library like PHP's OpenSSL extension). Again, do this is both frontend and backend code. See bug #12799 and https://bugs.php.net/bug.php?id=68276 Based on patches by Dave Vitek and Peter Eisentraut. From: Peter Geoghegan <firstname.lastname@example.org>
Fix SSL tests
commit : ab32a4057229dc59ee83614b1fcc7fe242213a78 author : Peter Eisentraut <email@example.com> date : Fri, 6 May 2016 23:45:12 -0400 committer: Peter Eisentraut <firstname.lastname@example.org> date : Fri, 6 May 2016 23:45:12 -0400
These were accidentally broken by the great backpatching of 331828b754378733cb5c2e49227603e7354e4e39.
Fix pg_upgrade to not fail when new-cluster TOAST rules differ from old.
commit : 196870f2fca7a4eec6f5b795dc75799f41e3ec7b author : Tom Lane <email@example.com> date : Fri, 6 May 2016 22:05:51 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Fri, 6 May 2016 22:05:51 -0400
This patch essentially reverts commit 4c6780fd17aa43ed, in favor of a much simpler solution for the case where the new cluster would choose to create a TOAST table but the old cluster doesn't have one: just don't create a TOAST table. The existing code failed in at least two different ways if the situation arose: (1) ALTER TABLE RESET didn't grab an exclusive lock, so that the lock sanity check in create_toast_table failed; (2) pg_upgrade did not provide a pg_type OID for the new toast table, so that the crosscheck in TypeCreate failed. While both these problems were introduced by later patches, they show that the hack being used to cause TOAST table creation is overwhelmingly fragile (and untested). I also note that before the TypeCreate crosscheck was added, the code would have resulted in assigning an indeterminate pg_type OID to the toast table, possibly causing a later OID conflict in that catalog; so that it didn't really work even when committed. If we simply don't create a TOAST table, there will only be a problem if the code tries to store a tuple that's wider than a page, and field compression isn't sufficient to get it under a page. Given that the TOAST creation threshold is intended to be about a quarter of a page, it's very hard to believe that cross-version differences in the do-we-need-a-toast- table heuristic could result in an observable problem. So let's just follow the old version's conclusion about whether a TOAST table is needed. (If we ever do change needs_toast_table() so much that this conclusion doesn't apply, we can devise a solution at that time, and hopefully do it in a less klugy way than 4c6780fd17aa43ed did.) Back-patch to 9.3, like the previous patch. Discussion: <email@example.com>
Fix possible read past end of string in to_timestamp().
commit : 504af1fe0497bceb0421a63fd8ef18e069ae057a author : Tom Lane <firstname.lastname@example.org> date : Fri, 6 May 2016 12:09:20 -0400 committer: Tom Lane <email@example.com> date : Fri, 6 May 2016 12:09:20 -0400
to_timestamp() handles the TH/th format codes by advancing over two input characters, whatever those are. It failed to notice whether there were two characters available to be skipped, making it possible to advance the pointer past the end of the input string and keep on parsing. A similar risk existed in the handling of "Y,YYY" format: it would advance over three characters after the "," whether or not three characters were available. In principle this might be exploitable to disclose contents of server memory. But the security team concluded that it would be very hard to use that way, because the parsing loop would stop upon hitting any zero byte, and TH/th format codes can't be consecutive --- they have to follow some other format code, which would have to match whatever data is there. So it seems impractical to examine memory very much beyond the end of the input string via this bug; and the input string will always be in local memory not in disk buffers, making it unlikely that anything very interesting is close to it in a predictable way. So this doesn't quite rise to the level of needing a CVE. Thanks to Wolf Roediger for reporting this bug.
Update time zone data files to tzdata release 2016d.
commit : 4edbb265cee0b468d444b4aabb1b236334f09c3a author : Tom Lane <firstname.lastname@example.org> date : Thu, 5 May 2016 20:08:58 -0400 committer: Tom Lane <email@example.com> date : Thu, 5 May 2016 20:08:58 -0400
DST law changes in Russia (Magadan, Tomsk regions) and Venezuela. Historical corrections for Russia. There are new zone names Europe/Kirov and Asia/Tomsk reflecting the fact that these regions now have different time zone histories from adjacent regions.
Fix ordering/categorization of some recently-added system views.
commit : e4a58520fc3328455b46cf9bf589904133faa016 author : Tom Lane <firstname.lastname@example.org> date : Thu, 5 May 2016 12:33:13 -0400 committer: Tom Lane <email@example.com> date : Thu, 5 May 2016 12:33:13 -0400
Somebody added pg_replication_origin, pg_replication_origin_status and pg_replication_slots to catalogs.sgml without a whole lot of concern for either alphabetical order or the difference between a table and a view. Clean up the mess. Back-patch to 9.5, not so much because this is critical as because if I don't it will result in a cross-branch divergence in release-9.5.sgml, which would be a maintenance hazard.
doc: Fix more typos
commit : c792440fe0770fb6dfcb478fe70b00c326021f8f author : Peter Eisentraut <firstname.lastname@example.org> date : Wed, 4 May 2016 14:07:00 -0400 committer: Peter Eisentraut <email@example.com> date : Wed, 4 May 2016 14:07:00 -0400
From: Alexander Law <firstname.lastname@example.org>
doc: Fix typos
commit : b0088f7dfffbb9b20b5b75692e94ca729d52270d author : Peter Eisentraut <email@example.com> date : Tue, 3 May 2016 21:06:25 -0400 committer: Peter Eisentraut <firstname.lastname@example.org> date : Tue, 3 May 2016 21:06:25 -0400
From: Alexander Law <email@example.com>
Fix configure's incorrect version tests for flex and perl.
commit : 5e7a7703bd5d51628b2ff4999a6b08455e25f1ca author : Tom Lane <firstname.lastname@example.org> date : Mon, 2 May 2016 11:18:10 -0400 committer: Tom Lane <email@example.com> date : Mon, 2 May 2016 11:18:10 -0400
awk's equality-comparison operator is "==" not "=". We got this right in many places, but not in configure's checks for supported version numbers of flex and perl. It hadn't been noticed because unsupported versions are so old as to be basically extinct in the wild, and because the only consequence is whether or not a WARNING flies by during configure. Daniel Gustafsson noted the problem with respect to the test for flex, I found the other by reviewing other awk calls.
Remove unused macros.
commit : ad5993d866f9fde16c454fe24b0a216c99ace355 author : Heikki Linnakangas <firstname.lastname@example.org> date : Mon, 2 May 2016 10:07:49 +0300 committer: Heikki Linnakangas <email@example.com> date : Mon, 2 May 2016 10:07:49 +0300
CHECK_PAGE_OFFSET_RANGE() has been unused forever. CHECK_RELATION_BLOCK_RANGE() has been unused in pgstatindex.c ever since bt_page_stats() and bt_page_items() functions were moved from pgstattuple to pageinspect module. It still exists in pageinspect/btreefuncs.c. Daniel Gustafsson
doc: Fix typo
commit : 25f462b656a065f5ba023f9398ab81afc90d1244 author : Peter Eisentraut <firstname.lastname@example.org> date : Sun, 1 May 2016 21:33:31 -0400 committer: Peter Eisentraut <email@example.com> date : Sun, 1 May 2016 21:33:31 -0400
From: Guillaume Lelarge <firstname.lastname@example.org>
Fix mishandling of equivalence-class tests in parameterized plans.
commit : f25d0619c7bcc787b7b67d6bd29f9627a47ff57e author : Tom Lane <email@example.com> date : Fri, 29 Apr 2016 20:19:38 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Fri, 29 Apr 2016 20:19:38 -0400
Given a three-or-more-way equivalence class, such as X.Y = Y.Y = Z.Z, it was possible for the planner to omit one of the quals needed to enforce that all members of the equivalence class are actually equal. This only happened in the case of a parameterized join node for two of the relations, that is a plan tree like Nested Loop -> Scan X -> Nested Loop -> Scan Y -> Scan Z Filter: Z.Z = X.X The eclass machinery normally expects to apply X.X = Y.Y when those two relations are joined, but in this shape of plan tree they aren't joined until the top node --- and, if the lower nested loop is marked as parameterized by X, the top node will assume that the relevant eclass condition(s) got pushed down into the lower node. On the other hand, the scan of Z assumes that it's only responsible for constraining Z.Z to match any one of the other eclass members. So one or another of the required quals sometimes fell between the cracks, depending on whether consideration of the eclass in get_joinrel_parampathinfo() for the lower nested loop chanced to generate X.X = Y.Y or X.X = Z.Z as the appropriate constraint there. If it generated the latter, it'd erroneously suppose that the Z scan would take care of matters. To fix, force X.X = Y.Y to be generated and applied at that join node when this case occurs. This is *extremely* hard to hit in practice, because various planner behaviors conspire to mask the problem; starting with the fact that the planner doesn't really like to generate a parameterized plan of the above shape. (It might have been impossible to hit it before we tweaked things to allow this plan shape for star-schema cases.) Many thanks to Alexander Kirkouski for submitting a reproducible test case. The bug can be demonstrated in all branches back to 9.2 where parameterized paths were introduced, so back-patch that far.
Fix comment whitespace in VS2105 patch
commit : eac3e16741e81c478ce0716683a72e7acc520c4a author : Andrew Dunstan <email@example.com> date : Fri, 29 Apr 2016 14:18:51 -0400 committer: Andrew Dunstan <firstname.lastname@example.org> date : Fri, 29 Apr 2016 14:18:51 -0400
per gripe from Michael Paquier.
Fix typo in VS2015 patch
commit : b71b4d8528d67198c190294d16bee8df66e42eb9 author : Andrew Dunstan <email@example.com> date : Fri, 29 Apr 2016 09:49:31 -0400 committer: Andrew Dunstan <firstname.lastname@example.org> date : Fri, 29 Apr 2016 09:49:31 -0400
reported by Christian Ullrich
Support building with Visual Studio 2015
commit : da52474f3d3cbdf38d8a6677a4ebedaf402ade3a author : Andrew Dunstan <email@example.com> date : Fri, 29 Apr 2016 07:59:47 -0400 committer: Andrew Dunstan <firstname.lastname@example.org> date : Fri, 29 Apr 2016 07:59:47 -0400
Adjust the way we detect the locale. As a result the minumum Windows version supported by VS2015 and later is Windows Vista. Add some tweaks to remove new compiler warnings. Remove documentation references to the now obsolete msysGit. Michael Paquier, somewhat edited by me, reviewed by Christian Ullrich. Backpatch to 9.5
Remember asking for feedback during walsender shutdown.
commit : 2e1b4adf39178416740efba975757e413a9fb3f9 author : Andres Freund <email@example.com> date : Thu, 28 Apr 2016 22:09:48 -0700 committer: Andres Freund <firstname.lastname@example.org> date : Thu, 28 Apr 2016 22:09:48 -0700
Since 5a991ef8 we're explicitly asking for feedback from the receiving side when shutting down walsender, if there's not yet replicated data. Unfortunately we didn't remember (i.e. set waiting_for_ping_response to true) having asked for feedback, leading to scenarios in which replies were requested at a high frequency. I can't reproduce this problem on my laptop, I think that's because the problem requires a significant TCP window to manifest due to the !pq_is_send_pending() condition. But since this clearly is a bug, let's fix it. There's quite possibly more wrong than just this though. While fiddling with WalSndDone(), I rewrote a hard to understand comment about looking at the flush vs. the write position. Reported-By: Nick Cleaton, Magnus Hagander Author: Nick Cleaton Discussion: CAFgz3kus=rC_avEgBV=+hRK5HYJ8vXskJRh8yEAbahJGTzF2VQ@mail.gmail.com CABUevExsjROqDcD0A2rnJ6HK6FuKGyewJr3PL12pw85BHFGS2Q@mail.gmail.com Backpatch: 9.4, were 5a991ef8 introduced the use of feedback messages during shutdown.
Adjust DatumGetBool macro, this time for sure.
commit : 94a16531b37628de456e082ee0d60e309607e9dd author : Tom Lane <email@example.com> date : Thu, 28 Apr 2016 11:50:58 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Thu, 28 Apr 2016 11:50:58 -0400
Commit 23a41573c attempted to fix the DatumGetBool macro to ignore bits in a Datum that are to the left of the actual bool value. But it did that by casting the Datum to bool; and on compilers that use C99 semantics for bool, that ends up being a whole-word test, not a 1-byte test. This seems to be the true explanation for contrib/seg failing in VS2015. To fix, use GET_1_BYTE() explicitly. I think in the previous patch, I'd had some idea of not having to commit to bool being exactly 1 byte wide, but regardless of what the compiler's bool is, boolean columns and Datums are certainly 1 byte wide. The previous fix was (eventually) back-patched into all active versions, so do likewise with this one.
Revert "Convert contrib/seg's bool-returning SQL functions to V1 call convention."
commit : 695718f99c4b9581fe6cc12543b69f2654a07f3b author : Tom Lane <email@example.com> date : Thu, 28 Apr 2016 11:48:10 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Thu, 28 Apr 2016 11:48:10 -0400
This reverts commit b1dd2f86ce7d43f23f6aae307bb22de826849e7d. That turns out to have been based on a faulty diagnosis of why the VS2015 build was misbehaving. Instead, we need to fix DatumGetBool().
Impose a full barrier in generic-xlc.h atomics functions.
commit : f9989482d0a24cd69f574b805db770980603a5ca author : Noah Misch <email@example.com> date : Tue, 26 Apr 2016 21:53:58 -0400 committer: Noah Misch <firstname.lastname@example.org> date : Tue, 26 Apr 2016 21:53:58 -0400
pg_atomic_compare_exchange_*_impl() were providing only the semantics of an acquire barrier. Buildfarm members hornet and mandrill revealed this deficit beginning with commit 008608b9d51061b1f598c197477b3dc7be9c4a64. While we have no report of symptoms in 9.5, we can't rule out the possibility of certain compilers, hardware, or extension code relying on these functions' specified barrier semantics. Back-patch to 9.5, where commit b64d92f1a5602c55ee8b27a7ac474f03b7aee340 introduced atomics. Reviewed by Andres Freund.
doc: Fix typo
commit : 46e006d64bd7ab34655c1e870786ae3932089a08 author : Peter Eisentraut <email@example.com> date : Sun, 24 Apr 2016 20:44:22 -0400 committer: Peter Eisentraut <firstname.lastname@example.org> date : Sun, 24 Apr 2016 20:44:22 -0400
From: Andreas Seltenreich <email@example.com>
Rename strtoi() to strtoint().
commit : bdf7744f7375128be4eae6a72a9c9e3c65043558 author : Tom Lane <firstname.lastname@example.org> date : Sat, 23 Apr 2016 16:53:15 -0400 committer: Tom Lane <email@example.com> date : Sat, 23 Apr 2016 16:53:15 -0400
NetBSD has seen fit to invent a libc function named strtoi(), which conflicts with the long-established static functions of the same name in datetime.c and ecpg's interval.c. While muttering darkly about intrusions on application namespace, we'll rename our functions to avoid the conflict. Back-patch to all supported branches, since this would affect attempts to build any of them on recent NetBSD. Thomas Munro
doc: Fix typos
commit : 3debaa603ffbc3927e263ae3c7c23b0fcfbd8def author : Peter Eisentraut <firstname.lastname@example.org> date : Sat, 23 Apr 2016 14:48:02 -0400 committer: Peter Eisentraut <email@example.com> date : Sat, 23 Apr 2016 14:48:02 -0400
From: Erik Rijkers <firstname.lastname@example.org>
Convert contrib/seg's bool-returning SQL functions to V1 call convention.
commit : b1dd2f86ce7d43f23f6aae307bb22de826849e7d author : Tom Lane <email@example.com> date : Fri, 22 Apr 2016 11:54:23 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Fri, 22 Apr 2016 11:54:23 -0400
It appears that we can no longer get away with using V0 call convention for bool-returning functions in newer versions of MSVC. The compiler seems to generate code that doesn't clear the higher-order bits of the result register, causing the bool result Datum to often read as "true" when "false" was intended. This is not very surprising, since the function thinks it's returning a bool-width result but fmgr_oldstyle assumes that V0 functions return "char *"; what's surprising is that that hack worked for so long on so many platforms. The only functions of this description in core+contrib are in contrib/seg, which we'd intentionally left mostly in V0 style to serve as a warning canary if V0 call convention breaks. We could imagine hacking things so that they're still V0 (we'd have to redeclare the bool-returning functions as returning some suitably wide integer type, like size_t, at the C level). But on the whole it seems better to convert 'em to V1. We can still leave the pointer- and int-returning functions in V0 style, so that the test coverage isn't gone entirely. Back-patch to 9.5, since our intention is to support VS2015 in 9.5 and later. There's no SQL-level change in the functions' behavior so back-patching should be safe enough. Discussion: <email@example.com> Michael Paquier, adjusted some by me
Add putenv support for msvcrt from Visual Studio 2013
commit : 409c49c64a0549c39044ed6ea845ba0fb6c6190d author : Magnus Hagander <firstname.lastname@example.org> date : Fri, 22 Apr 2016 05:18:59 -0400 committer: Magnus Hagander <email@example.com> date : Fri, 22 Apr 2016 05:18:59 -0400
This was missed when VS 2013 support was added. Michael Paquier
Fix unexpected side-effects of operator_precedence_warning.
commit : 81deadd317fca3f3230af2468ac29b7c36825fa3 author : Tom Lane <firstname.lastname@example.org> date : Thu, 21 Apr 2016 23:17:36 -0400 committer: Tom Lane <email@example.com> date : Thu, 21 Apr 2016 23:17:36 -0400
The implementation of that feature involves injecting nodes into the raw parsetree where explicit parentheses appear. Various places in parse_expr.c that test to see "is this child node of type Foo" need to look through such nodes, else we'll get different behavior when operator_precedence_warning is on than when it is off. Note that we only need to handle this when testing untransformed child nodes, since the AEXPR_PAREN nodes will be gone anyway after transformExprRecurse. Per report from Scott Ribe and additional code-reading. Back-patch to 9.5 where this feature was added. Report: <ED37E303-1B0A-4CD8-8E1E-B9C4C2DD9A17@elevated-dev.com>
Fix planner failure with full join in RHS of left join.
commit : 94c685a7cb58bad13cde78ce3c39206b460d5ae6 author : Tom Lane <firstname.lastname@example.org> date : Thu, 21 Apr 2016 20:05:58 -0400 committer: Tom Lane <email@example.com> date : Thu, 21 Apr 2016 20:05:58 -0400
Given a left join containing a full join in its righthand side, with the left join's joinclause referencing only one side of the full join (in a non-strict fashion, so that the full join doesn't get simplified), the planner could fail with "failed to build any N-way joins" or related errors. This happened because the full join was seen as overlapping the left join's RHS, and then recent changes within join_is_legal() caused that function to conclude that the full join couldn't validly be formed. Rather than try to rejigger join_is_legal() yet more to allow this, I think it's better to fix initsplan.c so that the required join order is explicit in the SpecialJoinInfo data structure. The previous coding there essentially ignored full joins, relying on the fact that we don't flatten them in the joinlist data structure to preserve their ordering. That's sufficient to prevent a wrong plan from being formed, but as this example shows, it's not sufficient to ensure that the right plan will be formed. We need to work a bit harder to ensure that the right plan looks sane according to the SpecialJoinInfos. Per bug #14105 from Vojtech Rylko. This was apparently induced by commit 8703059c6 (though now that I've seen it, I wonder whether there are related cases that could have failed before that); so back-patch to all active branches. Unfortunately, that patch also went into 9.0, so this bug is a regression that won't be fixed in that branch.
Improve TranslateSocketError() to handle more Windows error codes.
commit : d2e59cbc35c5e8f23148287e50e77dc3ddde8e00 author : Tom Lane <firstname.lastname@example.org> date : Thu, 21 Apr 2016 16:58:47 -0400 committer: Tom Lane <email@example.com> date : Thu, 21 Apr 2016 16:58:47 -0400
The coverage was rather lean for cases that bind() or listen() might return. Add entries for everything that there's a direct equivalent for in the set of Unix errnos that elog.c has heard of.
Remove dead code in win32.h.
commit : 575cbd48cd33328570a8c2ce7934d5d62cb4c3e6 author : Tom Lane <firstname.lastname@example.org> date : Thu, 21 Apr 2016 16:16:19 -0400 committer: Tom Lane <email@example.com> date : Thu, 21 Apr 2016 16:16:19 -0400
There's no longer a need for the MSVC-version-specific code stanza that forcibly redefines errno code symbols, because since commit 73838b52 we're unconditionally redefining them in the stanza before this one anyway. Now it's merely confusing and ugly, so get rid of it; and improve the comment that explains what's going on here. Although this is just cosmetic, back-patch anyway since I'm intending to back-patch some less-cosmetic changes in this same hunk of code.
Provide errno-translation wrappers around bind() and listen() on Windows.
commit : 20d4428f0986f2238231ee9d283e88b754876c75 author : Tom Lane <firstname.lastname@example.org> date : Thu, 21 Apr 2016 15:44:18 -0400 committer: Tom Lane <email@example.com> date : Thu, 21 Apr 2016 15:44:18 -0400
Fix Windows builds to report something useful rather than "could not bind IPv4 socket: No error" when bind() fails. Back-patch of commits d1b7d4877b9a71f4 and 22989a8e34168f57. Discussion: <firstname.lastname@example.org>
Fix ruleutils.c's dumping of ScalarArrayOpExpr containing an EXPR_SUBLINK.
commit : 4b52cc2892b809c4a5216f15d91f95d174ca72a5 author : Tom Lane <email@example.com> date : Thu, 21 Apr 2016 14:20:18 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Thu, 21 Apr 2016 14:20:18 -0400
When we shoehorned "x op ANY (array)" into the SQL syntax, we created a fundamental ambiguity as to the proper treatment of a sub-SELECT on the righthand side: perhaps what's meant is to compare x against each row of the sub-SELECT's result, or perhaps the sub-SELECT is meant as a scalar sub-SELECT that delivers a single array value whose members should be compared against x. The grammar resolves it as the former case whenever the RHS is a select_with_parens, making the latter case hard to reach --- but you can get at it, with tricks such as attaching a no-op cast to the sub-SELECT. Parse analysis would throw away the no-op cast, leaving a parsetree with an EXPR_SUBLINK SubLink directly under a ScalarArrayOpExpr. ruleutils.c was not clued in on this fine point, and would naively emit "x op ANY ((SELECT ...))", which would be parsed as the first alternative, typically leading to errors like "operator does not exist: text = text" during dump/reload of a view or rule containing such a construct. To fix, emit a no-op cast when dumping such a parsetree. This might well be exactly what the user wrote to get the construct accepted in the first place; and even if she got there with some other dodge, it is a valid representation of the parsetree. Per report from Karl Czajkowski. He mentioned only a case involving RLS policies, but actually the problem is very old, so back-patch to all supported branches. Report: <20160421001832.GB7976@moraine.isi.edu>
Honor PGCTLTIMEOUT environment variable for pg_regress' startup wait.
commit : 0b8e0bf0ab74d2dc36437d4642b23eb8a78fdda8 author : Tom Lane <email@example.com> date : Wed, 20 Apr 2016 23:48:13 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Wed, 20 Apr 2016 23:48:13 -0400
In commit 2ffa86962077c588 we made pg_ctl recognize an environment variable PGCTLTIMEOUT to set the default timeout for starting and stopping the postmaster. However, pg_regress uses pg_ctl only for the "stop" end of that; it has bespoke code for starting the postmaster, and that code has historically had a hard-wired 60-second timeout. Further buildfarm experience says it'd be a good idea if that timeout were also controlled by PGCTLTIMEOUT, so let's make it so. Like the previous patch, back-patch to all active branches. Discussion: <email@example.com>
Fix memory leak and other bugs in ginPlaceToPage() & subroutines.
commit : be27544569fc65b03d2a540fbebb712ab4b40407 author : Tom Lane <firstname.lastname@example.org> date : Wed, 20 Apr 2016 14:25:15 -0400 committer: Tom Lane <email@example.com> date : Wed, 20 Apr 2016 14:25:15 -0400
Commit 36a35c550ac114ca turned the interface between ginPlaceToPage and its subroutines in gindatapage.c and ginentrypage.c into a royal mess: page-update critical sections were started in one place and finished in another place not even in the same file, and the very same subroutine might return having started a critical section or not. Subsequent patches band-aided over some of the problems with this design by making things even messier. One user-visible resulting problem is memory leaks caused by the need for the subroutines to allocate storage that would survive until ginPlaceToPage calls XLogInsert (as reported by Julien Rouhaud). This would not typically be noticeable during retail index updates. It could be visible in a GIN index build, in the form of memory consumption swelling to several times the commanded maintenance_work_mem. Another rather nasty problem is that in the internal-page-splitting code path, we would clear the child page's GIN_INCOMPLETE_SPLIT flag well before entering the critical section that it's supposed to be cleared in; a failure in between would leave the index in a corrupt state. There were also assorted coding-rule violations with little immediate consequence but possible long-term hazards, such as beginning an XLogInsert sequence before entering a critical section, or calling elog(DEBUG) inside a critical section. To fix, redefine the API between ginPlaceToPage() and its subroutines by splitting the subroutines into two parts. The "beginPlaceToPage" subroutine does what can be done outside a critical section, including full computation of the result pages into temporary storage when we're going to split the target page. The "execPlaceToPage" subroutine is called within a critical section established by ginPlaceToPage(), and it handles the actual page update in the non-split code path. The critical section, as well as the XLOG insertion call sequence, are both now always started and finished in ginPlaceToPage(). Also, make ginPlaceToPage() create and work in a short-lived memory context to eliminate the leakage problem. (Since a short-lived memory context had been getting created in the most common code path in the subroutines, this shouldn't cause any noticeable performance penalty; we're just moving the overhead up one call level.) In passing, fix a bunch of comments that had gone unmaintained throughout all this klugery. Report: <571276DD.firstname.lastname@example.org>
Further reduce the number of semaphores used under --disable-spinlocks.
commit : c6a5b6677d5f12ccf3c2373117bf630ead30b798 author : Tom Lane <email@example.com> date : Mon, 18 Apr 2016 13:33:07 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Mon, 18 Apr 2016 13:33:07 -0400
Per discussion, there doesn't seem to be much value in having NUM_SPINLOCK_SEMAPHORES set to 1024: under any scenario where you are running more than a few backends concurrently, you really had better have a real spinlock implementation if you want tolerable performance. And 1024 semaphores is a sizable fraction of the system-wide SysV semaphore limit on many platforms. Therefore, reduce this setting's default value to 128 to make it less likely to cause out-of-semaphores problems.
doc: Add missing parentheses
commit : e2c183ef808466ed20c2d7877b9c10e13c897e16 author : Peter Eisentraut <email@example.com> date : Fri, 15 Apr 2016 20:44:10 -0400 committer: Peter Eisentraut <firstname.lastname@example.org> date : Fri, 15 Apr 2016 20:44:10 -0400
From: Alexander Law <email@example.com>
Fix possible crash in ALTER TABLE ... REPLICA IDENTITY USING INDEX.
commit : 8f8e65d348af7aa6899eb722dddeb6b88c682769 author : Tom Lane <firstname.lastname@example.org> date : Fri, 15 Apr 2016 12:11:27 -0400 committer: Tom Lane <email@example.com> date : Fri, 15 Apr 2016 12:11:27 -0400
Careless coding added by commit 07cacba983ef79be could result in a crash or a bizarre error message if someone tried to select an index on the OID column as the replica identity index for a table. Back-patch to 9.4 where the feature was introduced. Discussion: CAKJS1f8TQYgTRDyF1_u9PVCKWRWz+DkieH=U7954HeHVPJKaKg@mail.gmail.com David Rowley
Fix memory leak in GIN index scans.
commit : edd57377f0db00a66d39029aa5239a96280887ef author : Tom Lane <firstname.lastname@example.org> date : Fri, 15 Apr 2016 00:02:26 -0400 committer: Tom Lane <email@example.com> date : Fri, 15 Apr 2016 00:02:26 -0400
The code had a query-lifespan memory leak when encountering GIN entries that have posting lists (rather than posting trees, ie, there are a relatively small number of heap tuples containing this index key value). With a suitable data distribution this could add up to a lot of leakage. Problem seems to have been introduced by commit 36a35c550, so back-patch to 9.4. Julien Rouhaud
Remove trailing commas in enums.
commit : 593f469a048f1479d19579a06ec32cce9ddfa190 author : Andres Freund <firstname.lastname@example.org> date : Thu, 14 Apr 2016 18:54:06 -0700 committer: Andres Freund <email@example.com> date : Thu, 14 Apr 2016 18:54:06 -0700
These aren't valid C89. Found thanks to gcc's -Wc90-c99-compat. These exist in differing places in most supported branches.
Fix core dump in ReorderBufferRestoreChange on alignment-picky platforms.
commit : e7a456174b2eca37b141952b6f7ef4254887f819 author : Tom Lane <firstname.lastname@example.org> date : Thu, 14 Apr 2016 19:42:22 -0400 committer: Tom Lane <email@example.com> date : Thu, 14 Apr 2016 19:42:22 -0400
When re-reading an update involving both an old tuple and a new tuple from disk, reorderbuffer.c was careless about whether the new tuple is suitably aligned for direct access --- in general, it isn't. We'd missed seeing this in the buildfarm because the contrib/test_decoding tests exercise this code path only a few times, and by chance all of those cases have old tuples with length a multiple of 4, which is usually enough to make the access to the new tuple's t_len safe. For some still-not-entirely-clear reason, however, Debian's sparc build gets a bus error, as reported by Christoph Berg; perhaps it's assuming 8-byte alignment of the pointer? The lack of previous field reports is probably because you need all of these conditions to trigger a crash: an alignment-picky platform (not Intel), a transaction large enough to spill to disk, an update within that xact that changes a primary-key field and has an odd-length old tuple, and of course logical decoding tracing the transaction. Avoid the alignment assumption by using memcpy instead of fetching t_len directly, and add a test case that exposes the crash on picky platforms. Back-patch to 9.4 where the bug was introduced. Discussion: <20160413094117.GC21485@msg.credativ.de>
Adjust datatype of ReplicationState.acquired_by.
commit : ce47112b6a91a39b0dd9295c046d31dd7ec50fb8 author : Tom Lane <firstname.lastname@example.org> date : Thu, 14 Apr 2016 12:18:09 -0400 committer: Tom Lane <email@example.com> date : Thu, 14 Apr 2016 12:18:09 -0400
It was declared as "pid_t", which would be fine except that none of the places that printed it in error messages took any thought for the possibility that it's not equivalent to "int". This leads to warnings on some buildfarm members, and could possibly lead to actually wrong error messages on those platforms. There doesn't seem to be any very good reason not to just make it "int"; it's only ever assigned from MyProcPid, which is int. If we want to cope with PIDs that are wider than int, this is not the place to start. Also, fix the comment, which seems to perhaps be a leftover from a time when the field was only a bool? Per buildfarm. Back-patch to 9.5 which has same issue.
Fix pg_dump so pg_upgrade'ing an extension with simple opfamilies works.
commit : fb0f6393358519ec97623306bbfc6063426902fe author : Tom Lane <firstname.lastname@example.org> date : Wed, 13 Apr 2016 18:57:52 -0400 committer: Tom Lane <email@example.com> date : Wed, 13 Apr 2016 18:57:52 -0400
As reported by Michael Feld, pg_upgrade'ing an installation having extensions with operator families that contain just a single operator class failed to reproduce the extension membership of those operator families. This caused no immediate ill effects, but would create problems when later trying to do a plain dump and restore, because the seemingly-not-part-of- the-extension operator families would appear separately in the pg_dump output, and then would conflict with the families created by loading the extension. This has been broken ever since extensions were introduced, and many of the standard contrib extensions are affected, so it's a bit astonishing nobody complained before. The cause of the problem is a perhaps-ill-considered decision to omit such operator families from pg_dump's output on the grounds that the CREATE OPERATOR CLASS commands could recreate them, and having explicit CREATE OPERATOR FAMILY commands would impede loading the dump script into pre-8.3 servers. Whatever the merits of that decision when 8.3 was being written, it looks like a poor tradeoff now. We can fix the pg_upgrade problem simply by removing that code, so that the operator families are dumped explicitly (and then will be properly made to be part of their extensions). Although this fixes the behavior of future pg_upgrade runs, it does nothing to clean up existing installations that may have improperly-linked operator families. Given the small number of complaints to date, maybe we don't need to worry about providing an automated solution for that; anyone who needs to clean it up can do so with manual "ALTER EXTENSION ADD OPERATOR FAMILY" commands, or even just ignore the duplicate-opfamily errors they get during a pg_restore. In any case we need this fix. Back-patch to all supported branches. Discussion: <firstname.lastname@example.org>
Fix _SPI_execute_plan() for CREATE TABLE IF NOT EXISTS foo AS ...
commit : 079013f0b7e35f2fb14cdbe2667a1d9aac4f770e author : Tom Lane <email@example.com> date : Mon, 11 Apr 2016 20:07:17 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Mon, 11 Apr 2016 20:07:17 -0400
When IF NOT EXISTS was added to CREATE TABLE AS, this logic didn't get the memo, possibly resulting in an Assert failure. It looks like there would have been no ill effects in a non-Assert build, though. Back-patch to 9.5 where the IF NOT EXISTS option was added. Stas Kelvich
Fix freshly-introduced PL/Python portability bug.
commit : 8207c6baf8b42085bef442178ce8721ea726d9c7 author : Tom Lane <email@example.com> date : Mon, 11 Apr 2016 18:17:02 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Mon, 11 Apr 2016 18:17:02 -0400
It turns out that those PyErr_Clear() calls I removed from plpy_elog.c in 7e3bb080387f4143 et al were not quite as random as they appeared: they mask a Python 2.3.x bug. (Specifically, it turns out that PyType_Ready() can fail if the error indicator is set on entry, and PLy_traceback's fetch of frame.f_code may be the first operation in a session that requires the "frame" type to be readied. Ick.) Put back the clear call, but in a more centralized place closer to what it's protecting, and this time with a comment warning what it's really for. Per buildfarm member prairiedog. Although prairiedog was only failing on HEAD, it seems clearly possible for this to occur in older branches as well, so back-patch to 9.2 the same as the previous patch.
Fix access-to-already-freed-memory issue in plpython's error handling.
commit : ec91ee8f00af9c3960cdc3dd1ecb9e3bb7cfee86 author : Tom Lane <email@example.com> date : Sun, 10 Apr 2016 23:15:55 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Sun, 10 Apr 2016 23:15:55 -0400
PLy_elog() could attempt to access strings that Python had already freed, because the strings that PLy_get_spi_error_data() returns are simply pointers into storage associated with the error "val" PyObject. That's fine at the instant PLy_get_spi_error_data() returns them, but just after that PLy_traceback() intentionally releases the only refcount on that object, allowing it to be freed --- so that the strings we pass to ereport() are dangling pointers. In principle this could result in garbage output or a coredump. In practice, I think the risk is pretty low, because there are no Python operations between where we decrement that refcount and where we use the strings (and copy them into PG storage), and thus no reason for Python to recycle the storage. Still, it's clearly hazardous, and it leads to Valgrind complaints when running under a Valgrind that hasn't been lobotomized to ignore Python memory allocations. The code was a mess anyway: we fetched the error data out of Python (clearing Python's error indicator) with PyErr_Fetch, examined it, pushed it back into Python with PyErr_Restore (re-setting the error indicator), then immediately pulled it back out with another PyErr_Fetch. Just to confuse matters even more, there were some gratuitous-and-yet-hazardous PyErr_Clear calls in the "examine" step, and we didn't get around to doing PyErr_NormalizeException until after the second PyErr_Fetch, making it even less clear which object was being manipulated where and whether we still had a refcount on it. (If PyErr_NormalizeException did substitute a different "val" object, it's possible that the problem could manifest for real, because then we'd be doing assorted Python stuff with no refcount on the object we have string pointers into.) So, rearrange all that into some semblance of sanity, and don't decrement the refcount on the Python error objects until the end of PLy_elog(). In HEAD, I failed to resist the temptation to reformat some messy bits from 5c3c3cd0a3046339 along the way. Back-patch as far as 9.2, because the code is substantially the same that far back. I believe that 9.1 has the bug as well; but the code around it is rather different and I don't want to take a chance on breaking something for what seems a low-probability problem.
Fix possible use of uninitialised value in ts_headline()
commit : bf73016e01f0b9eb7c9ad1916a75d1c3bf78f743 author : Teodor Sigaev <email@example.com> date : Fri, 8 Apr 2016 21:25:32 +0300 committer: Teodor Sigaev <firstname.lastname@example.org> date : Fri, 8 Apr 2016 21:25:32 +0300
Found during investigation of failure of skink buildfarm member and its valgrind report. Backpatch to all supported branches
Turn down MSVC compiler verbosity
commit : 8491679434d824bcb3a1d1713070261056683476 author : Andrew Dunstan <email@example.com> date : Fri, 8 Apr 2016 12:25:10 -0400 committer: Andrew Dunstan <firstname.lastname@example.org> date : Fri, 8 Apr 2016 12:25:10 -0400
Most of what is produced by the detailed verbosity level is of no interest at all, so switch to the normal level for more usable output. Christian Ullrich Backpatch to all live branches
Fix multiple bugs in tablespace symlink removal.
commit : 0da7cf6e85f06f6dad50114a4686d73a3b794d1d author : Tom Lane <email@example.com> date : Fri, 8 Apr 2016 12:31:42 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Fri, 8 Apr 2016 12:31:42 -0400
Don't try to examine S_ISLNK(st.st_mode) after a failed lstat(). It's undefined. Also, if the lstat() reported ENOENT, we do not wish that to be a hard error, but the code might nonetheless treat it as one (giving an entirely misleading error message, too) depending on luck-of-the-draw as to what S_ISLNK() returned. Don't throw error for ENOENT from rmdir(), either. (We're not really expecting ENOENT because we just stat'd the file successfully; but if we're going to allow ENOENT in the symlink code path, surely the directory code path should too.) Generate an appropriate errcode for its-the-wrong-type-of-file complaints. (ERRCODE_SYSTEM_ERROR doesn't seem appropriate, and failing to write errcode() around it certainly doesn't work, and not writing an errcode at all is not per project policy.) Valgrind noticed the undefined S_ISLNK result; the other problems emerged while reading the code in the area. All of this appears to have been introduced in 8f15f74a44f68f9c. Back-patch to 9.5 where that commit appeared.
Fix broken ALTER INDEX documentation
commit : 6929e7f0f481193a101aa721f6afe5e4382b696f author : Alvaro Herrera <email@example.com> date : Tue, 5 Apr 2016 19:03:42 -0300 committer: Alvaro Herrera <firstname.lastname@example.org> date : Tue, 5 Apr 2016 19:03:42 -0300
Commit b8a91d9d1c put the description of the new IF EXISTS clause in the wrong place -- move it where it belongs. Backpatch to 9.2.
Disallow newlines in parameter values to be set in ALTER SYSTEM.
commit : f3d17491c49362b78da0c1a5b0691821dcc8c435 author : Tom Lane <email@example.com> date : Mon, 4 Apr 2016 18:05:23 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Mon, 4 Apr 2016 18:05:23 -0400
As noted by Julian Schauder in bug #14063, the configuration-file parser doesn't support embedded newlines in string literals. While there might someday be a good reason to remove that restriction, there doesn't seem to be one right now. However, ALTER SYSTEM SET could accept strings containing newlines, since many of the variable-specific value-checking routines would just see a newline as whitespace. This led to writing a postgresql.auto.conf file that was broken and had to be removed manually. Pending a reason to work harder, just throw an error if someone tries this. In passing, fix several places in the ALTER SYSTEM logic that failed to provide an errcode() for an ereport(), and thus would falsely log the failure as an internal XX000 error. Back-patch to 9.4 where ALTER SYSTEM was introduced.
Fix latent portability issue in pgwin32_dispatch_queued_signals().
commit : 3644ac04c1ea27e596b77b7a02609b50b4742403 author : Tom Lane <email@example.com> date : Mon, 4 Apr 2016 11:13:17 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Mon, 4 Apr 2016 11:13:17 -0400
The first iteration of the signal-checking loop would compute sigmask(0) which expands to 1<<(-1) which is undefined behavior according to the C standard. The lack of field reports of trouble suggest that it evaluates to 0 on all existing Windows compilers, but that's hardly something to rely on. Since signal 0 isn't a queueable signal anyway, we can just make the loop iterate from 1 instead, and save a few cycles as well as avoiding the undefined behavior. In passing, avoid evaluating the volatile expression UNBLOCKED_SIGNAL_QUEUE twice in a row; there's no reason to waste cycles like that. Noted by Aleksander Alekseev, though this isn't his proposed fix. Back-patch to all supported branches.
Fix broken variable declaration
commit : c6d2fa1ab089110faee2810ef0fda1bccd4f1f6a author : Alvaro Herrera <email@example.com> date : Wed, 30 Mar 2016 23:39:15 -0300 committer: Alvaro Herrera <firstname.lastname@example.org> date : Wed, 30 Mar 2016 23:39:15 -0300
Author: Konstantin Knizhnik
Remove TZ environment-variable entry from postgres reference page.
commit : 6af513730c93ed3d7e9968bb88161cc347a2f9b1 author : Tom Lane <email@example.com> date : Tue, 29 Mar 2016 21:38:14 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Tue, 29 Mar 2016 21:38:14 -0400
The server hasn't paid attention to the TZ environment variable since commit ca4af308c32d03db, but that commit missed removing this documentation reference, as did commit d883b916a947a3c6 which added the reference where it now belongs (initdb). Back-patch to 9.2 where the behavior changed. Also back-patch d883b916a947a3c6 as needed. Matthew Somerville
Fix pgbench documentation error.
commit : ffd2a9eb5ede1340bd949c032ed8b7ef92b3ca09 author : Robert Haas <email@example.com> date : Tue, 29 Mar 2016 13:46:57 -0400 committer: Robert Haas <firstname.lastname@example.org> date : Tue, 29 Mar 2016 13:46:57 -0400
The description of what the per-transaction log file says for skipped transactions is just plain wrong. Report and patch by Tomas Vondra, reviewed by Fabien Coelho and modified by me.
Avoid possibly-unsafe use of Windows' FormatMessage() function.
commit : 491e847380740dac54d4ecae820261bbaa8aee44 author : Tom Lane <email@example.com> date : Tue, 29 Mar 2016 11:54:57 -0400 committer: Tom Lane <firstname.lastname@example.org> date : Tue, 29 Mar 2016 11:54:57 -0400
Whenever this function is used with the FORMAT_MESSAGE_FROM_SYSTEM flag, it's good practice to include FORMAT_MESSAGE_IGNORE_INSERTS as well. Otherwise, if the message contains any %n insertion markers, the function will try to fetch argument strings to substitute --- which we are not passing, possibly leading to a crash. This is exactly analogous to the rule about not giving printf() a format string you're not in control of. Noted and patched by Christian Ullrich. Back-patch to all supported branches.
Mention BRIN as able to do multi-column indexes
commit : 978894a41f335ccd21140c559ecdc22f42d2f142 author : Alvaro Herrera <email@example.com> date : Mon, 28 Mar 2016 19:11:12 -0300 committer: Alvaro Herrera <firstname.lastname@example.org> date : Mon, 28 Mar 2016 19:11:12 -0300
Documentation mentioned B-tree, GiST and GIN as able to do multicolumn indexes; I failed to add BRIN to the list. Author: Petr Jediný Reviewed-By: Fujii Masao, Emre Hasegeli