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* Fix some minor spec-compliance issues in jsonpath lexer.Tom Lane2019-09-20
| | | | | | | | | | | | | | | | | | | | | | Although the SQL/JSON tech report makes reference to ECMAScript which allows both single- and double-quoted strings, all the rest of the report speaks only of double-quoted string literals in jsonpaths. That's more compatible with JSON itself; moreover single-quoted strings are hard to use inside a jsonpath that is itself a single-quoted SQL literal. So guess that the intent is to allow only double-quoted literals, and remove lexer support for single-quoted literals. It'll be less painful to add this again later if we're wrong, than to remove a shipped feature. Also, adjust the lexer so that unrecognized backslash sequences are treated as just meaning the escaped character, not as errors. This change has much better support in the standards, as JSON, JavaScript and ECMAScript all make it plain that that's what's supposed to happen. Back-patch to v12. Discussion: https://postgr.es/m/CAPpHfdvDci4iqNF9fhRkTqhe-5_8HmzeLt56drH%2B_Rv2rNRqfg@mail.gmail.com
* Revert "Add DECLARE STATEMENT support to ECPG."Tom Lane2019-09-20
| | | | | | | | | | | | This reverts commit bd7c95f0c1a38becffceb3ea7234d57167f6d4bf, along with assorted follow-on fixes. There are some questions about the definition and implementation of that statement, and we don't have time to resolve them before v13 release. Rather than ship the feature and then have backwards-compatibility concerns constraining any redesign, let's remove it for now and try again later. Discussion: https://postgr.es/m/TY2PR01MB2443EC8286995378AEB7D9F8F5B10@TY2PR01MB2443.jpnprd01.prod.outlook.com
* Fix progress report of REINDEX INDEXAlvaro Herrera2019-09-20
| | | | | | | | I (Álvaro) broke that in commit 6212276e4343 -- forgot to set the necessary flag. Repair. Author: Amit Langote Discussion: https://postgr.es/m/CA+HiwqEaM2tV5awKhP1vSbgjQe_uXVU15Oi4sTgwgempwMiT8g@mail.gmail.com
* Provide stable test for NULL-values in KNN SP-GiSTAlexander Korotkov2019-09-20
| | | | | | | f5f084fc3e has removed test because of its instability. This commit provides alternative test with determined ordering using extra ORDER BY expression. Backpatch-through: 12
* Remove unstable KNN SP-GiST testAlexander Korotkov2019-09-20
| | | | | | | | | 6cae9d2c10 introduced test for NULL values in KNN SP-GiST. This test relies on undetermined ordering showing different results on various platforms. This commit removes that test. Will be replaced with better test later. Discussion: https://postgr.es/m/6d51305e1159241cabee132f7efc7eff%40xs4all.nl Backpatch-through: 12
* Fix freeing old values in index_store_float8_orderby_distances()Alexander Korotkov2019-09-20
| | | | | | | | | | | | | | | 6cae9d2c10 has added an error in freeing old values in index_store_float8_orderby_distances() function. It looks for old value in scan->xs_orderbynulls[i] after setting a new value there. This commit fixes that. Also it removes short-circuit in handling distances == NULL situation. Now distances == NULL will be treated the same way as array with all null distances. That is, previous values will be freed if any. Reported-by: Tom Lane, Nikita Glukhov Discussion: https://postgr.es/m/CAPpHfdu2wcoAVAm3Ek66rP%3Duo_C-D84%2B%2Buf1VEcbyi_caBXWCA%40mail.gmail.com Discussion: https://postgr.es/m/426580d3-a668-b9d1-7b8e-f74d1a6524e0%40postgrespro.ru Backpatch-through: 12
* Improve handling of NULLs in KNN-GiST and KNN-SP-GiSTAlexander Korotkov2019-09-19
| | | | | | | | | | | | | | | | | | | | | This commit improves subject in two ways: * It removes ugliness of 02f90879e7, which stores distance values and null flags in two separate arrays after GISTSearchItem struct. Instead we pack both distance value and null flag in IndexOrderByDistance struct. Alignment overhead should be negligible, because we typically deal with at most few "col op const" expressions in ORDER BY clause. * It fixes handling of "col op NULL" expression in KNN-SP-GiST. Now, these expression are not passed to support functions, which can't deal with them. Instead, NULL result is implicitly assumed. It future we may decide to teach support functions to deal with NULL arguments, but current solution is bugfix suitable for backpatch. Reported-by: Nikita Glukhov Discussion: https://postgr.es/m/826f57ee-afc7-8977-c44c-6111d18b02ec%40postgrespro.ru Author: Nikita Glukhov Reviewed-by: Alexander Korotkov Backpatch-through: 9.4
* GSSAPI error message improvementsPeter Eisentraut2019-09-19
| | | | | | | | | | Make the error messages around GSSAPI encryption a bit clearer. Tweak some messages to avoid plural problems. Also make a code change for clarity. Using "conf" for "confidential" is quite confusing. Using "conf_state" is perhaps not much better but that's what the GSSAPI documentation uses, so there is at least some hope of understanding it.
* Revert change of ecpglib major versionPeter Eisentraut2019-09-19
| | | | | | | | | The major version of ecpglib was changed in bd7c95f0c1a38becffceb3ea7234d57167f6d4bf, apparently without justification. Revert this, since nothing has changed in this library except some added functions. Discussion: https://www.postgresql.org/message-id/flat/48ee4c56-e1df-b39d-2cad-c7d80b120eb5%402ndquadrant.com
* Fix example program in docs too (??)Alvaro Herrera2019-09-18
| | | | | | Fixup for previous commit: actually, the complete source for testlibpq3.c appears in SGML docs, so we need to patch that also. Go figure.
* Fix testlibpq3Alvaro Herrera2019-09-18
| | | | | | | | | | The sample output assumes non-standard-conforming interpretation of backslashes in input literals, so the actual output didn't match. Noticed while perusing another patch that touches this file. Evidently this code is seldom checked, so I'm not going to bother backpatching this fix.
* pg_upgrade/test.sh: Quote sed(1) argumentAlvaro Herrera2019-09-18
| | | | | | | Lack of quotes results in failure to run the test under older Solaris. Author: Marina Polyakova, Victor Wagner Discussion: https://postgr.es/m/feba89f89e8925b3535cb7d72b9e05e1@postgrespro.ru
* Remove unused smgrdounlinkfork() function.Fujii Masao2019-09-18
| | | | | | | | | smgrdounlinkfork() became dead code as the result of commit ece01aae47, but it was left in place just in case we want it someday. However no users have appeared in 7 years, so it's time to remove this unused function. Author: Kirk Jamison Discussion: https://www.postgresql.org/message-id/D09B13F772D2274BB348A310EE3027C64E2067@g01jpexmbkw24
* Add some const decorations to array constantsPeter Eisentraut2019-09-17
| | | | | Author: Mark G <markg735@gmail.com> Discussion: https://www.postgresql.org/message-id/flat/CAEeOP_YFVeFjq4zDZLDQbLSRFxBiTpwBQHxCNgGd%2Bp5VztTXyQ%40mail.gmail.com
* Fix bogus handling of XQuery regex option flags.Tom Lane2019-09-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The SQL spec defers to XQuery to define what the option flags are for LIKE_REGEX patterns. XQuery says that: * 's' allows the dot character to match newlines, which by default it will not; * 'm' allows ^ and $ to match at newlines, not only at the start/end of the whole string. Thus, these are *not* inverses as they are for the similarly-named POSIX options, and neither one corresponds to the POSIX 'n' option. Fortunately, Spencer's library does expose these two behaviors as separately twiddlable flags, so we just have to fix the mapping from JSP flag bits to REG flag bits. I also chose to rename the symbol for 's' to DOTALL, to make it clearer that it's not the inverse of MLINE. Also, XQuery says that if the 'q' flag "is used together with the m, s, or x flag, that flag has no effect". I read this as saying that 'q' overrides the other flags; whoever wrote our code seems to have read it backwards. Lastly, while XQuery's 'x' flag is related to what Spencer's code does for REG_EXPANDED, it's not the same or a subset. It seems best to treat XQuery's 'x' as unimplemented for now. Maybe later we can expand our regex code to offer 'x'-style parsing as a separate option. While at it, refactor the jsonpath code so that (a) there's only one copy of the flag transformation logic not two, and (b) the processing of flags is independent of the order in which the flags are written. We need some documentation updates to go with this, but I'll tackle that separately. Back-patch to v12 where this code originated. Discussion: https://postgr.es/m/CAPpHfdvDci4iqNF9fhRkTqhe-5_8HmzeLt56drH%2B_Rv2rNRqfg@mail.gmail.com Reference: https://www.w3.org/TR/2017/REC-xpath-functions-31-20170321/#flags
* Remove mingwcompat.cPeter Eisentraut2019-09-17
| | | | | | | We believe that the issues that this was working around have been fixed in MinGW more than 5 years ago, so this isn't necessary anymore. Discussion: https://www.postgresql.org/message-id/flat/20190719050830.GK1859%40paquier.xyz
* Support for SSSSS datetime format patternAlexander Korotkov2019-09-16
| | | | | | | | | | | | | | SQL Standard 2016 defines SSSSS format pattern for seconds past midnight in jsonpath .datetime() method and CAST (... FORMAT ...) SQL clause. In our datetime parsing engine we currently support it with SSSS name. This commit adds SSSSS as an alias for SSSS. Alias is added in favor of upcoming jsonpath .datetime() method. But it's also supported in to_date()/ to_timestamp() as positive side effect. Discussion: https://postgr.es/m/CAPpHfdsZgYEra_PeCLGNoXOWYx6iU-S3wF8aX0ObQUcZU%2B4XTw%40mail.gmail.com Author: Nikita Glukhov, Alexander Korotkov Reviewed-by: Anastasia Lubennikova, Peter Eisentraut
* Support for FF1-FF6 datetime format patternsAlexander Korotkov2019-09-16
| | | | | | | | | | | | | | | | | | | | SQL Standard 2016 defines FF1-FF9 format patters for fractions of seconds in jsonpath .datetime() method and CAST (... FORMAT ...) SQL clause. Parsing engine of upcoming .datetime() method will be shared with to_date()/ to_timestamp(). This patch implements FF1-FF6 format patterns for upcoming jsonpath .datetime() method. to_date()/to_timestamp() functions will also get support of this format patterns as positive side effect. FF7-FF9 are not supported due to lack of precision in our internal timestamp representation. Extracted from original patch by Nikita Glukhov, Teodor Sigaev, Oleg Bartunov. Heavily revised by me. Discussion: https://postgr.es/m/fcc6fc6a-b497-f39a-923d-aa34d0c588e8%402ndQuadrant.com Discussion: https://postgr.es/m/CAPpHfdsZgYEra_PeCLGNoXOWYx6iU-S3wF8aX0ObQUcZU%2B4XTw%40mail.gmail.com Author: Nikita Glukhov, Teodor Sigaev, Oleg Bartunov, Alexander Korotkov Reviewed-by: Anastasia Lubennikova, Peter Eisentraut
* Fix bogus sizeof calculations.Tom Lane2019-09-15
| | | | | Noted by Coverity. Typo in 27cc7cd2b, so back-patch to v12 as that was.
* Fix intermittent self-test failures caused by the stats_ext test.Dean Rasheed2019-09-15
| | | | | | | | | | | | | | | Commit d7f8d26d9 added new tests to the stats_ext regression test that included creating a view in the public schema, without realising that the stats_ext test runs in the same parallel group as the rules test, which makes doing that unsafe. This led to intermittent failures of the rules test on the buildfarm, although I wasn't able to reproduce that locally. Fix by creating the view in a different schema. Tomas Vondra and Dean Rasheed, report and diagnosis by Thomas Munro. Discussion: https://postgr.es/m/CA+hUKGKX9hFZrYA7rQzAMRE07L4hziCc-nO_b3taJpiuKyLLxg@mail.gmail.com
* Revert "For all ppc compilers, implement pg_atomic_fetch_add_ with inline asm."Noah Misch2019-09-14
| | | | | | | | | This reverts commit e7ff59686eacf5021fb84be921116986c3828d8a. It defined pg_atomic_fetch_add_u32_impl() without defining pg_atomic_compare_exchange_u32_impl(), which is incompatible with src/include/port/atomics/fallback.h. Per buildfarm member prairiedog. Discussion: https://postgr.es/m/7517.1568470247@sss.pgh.pa.us
* For all ppc compilers, implement pg_atomic_fetch_add_ with inline asm.Noah Misch2019-09-13
| | | | | | | | | This is more like how we handle s_lock.h and arch-x86.h. This does not materially affect code generation for gcc 7.2.0 or xlc 13.1.3. Reviewed by Tom Lane. Discussion: https://postgr.es/m/20190831071157.GA3251746@rfd.leadboat.com
* Replace xlc __fetch_and_add() with inline asm.Noah Misch2019-09-13
| | | | | | | | | | PostgreSQL has been unusable when built with xlc 13 and newer, which are incompatible with our use of __fetch_and_add(). Back-patch to 9.5, which introduced pg_atomic_fetch_add_u32(). Reviewed by Tom Lane. Discussion: https://postgr.es/m/20190831071157.GA3251746@rfd.leadboat.com
* Test pg_atomic_fetch_add_ with variable addend and 16-bit edge cases.Noah Misch2019-09-13
| | | | | | | | Back-patch to 9.5, which introduced these functions. Reviewed by Tom Lane. Discussion: https://postgr.es/m/20190831071157.GA3251746@rfd.leadboat.com
* Make tuplesort_set_bound() assertions more comprehensible, hopefully.Tom Lane2019-09-13
| | | | | | | | Add the comments that I griped were missing. Also re-order tests so that parallelism-related tests aren't randomly separated from each other. Discussion: https://postgr.es/m/CAAaqYe9GD__4Crm=ddz+-XXcNhfY_V5gFYdLdmkFNq=2VHO56Q@mail.gmail.com
* logical decoding: process ASSIGNMENT during snapshot buildAlvaro Herrera2019-09-13
| | | | | | | | | | | | | Most WAL records are ignored in early SnapBuild snapshot build phases. But it's critical to process some of them, so that later messages have the correct transaction state after the snapshot is completely built; in particular, XLOG_XACT_ASSIGNMENT messages are critical in order for sub-transactions to be correctly assigned to their parent transactions, or at least one assert misbehaves, as reported by Ildar Musin. Diagnosed-by: Masahiko Sawada Author: Masahiko Sawada Discussion: https://postgr.es/m/CAONYFtOv+Er1p3WAuwUsy1zsCFrSYvpHLhapC_fMD-zNaRWxYg@mail.gmail.com
* Fix under-parenthesized macro definitionsAlvaro Herrera2019-09-13
| | | | | | | | | | Lack of parens in the definitions could cause a statement using these macros to have unexpected semantics. In current code no bug is apparent, but best to fix the definitions to avoid problems down the line. Reported-by: Tom Lane Discussion: https://postgr.es/m/19795.1568400476@sss.pgh.pa.us
* Fix progress reporting of CLUSTER / VACUUM FULLAlvaro Herrera2019-09-13
| | | | | | | | | | | | | | | | | | The progress state was being clobbered once the first index completed being rebuilt, causing the final phases of the operation not show anything in the progress view. This was inadvertently broken in 03f9e5cba0ee, which added progress tracking for REINDEX. (The reason this bugfix is this small is that I had already noticed this problem when writing monitoring for CREATE INDEX, and had already worked around it, as can be seen in discussion starting at https://postgr.es/m/20190329150218.GA25010@alvherre.pgsql Fixing the problem is just a matter of fixing one place touched by the REINDEX monitoring.) Reported by: Álvaro Herrera Author: Álvaro Herrera Discussion: https://postgr.es/m/20190801184333.GA21369@alvherre.pgsql
* Add tab completion for CREATE OR REPLACE in psql.Fujii Masao2019-09-13
| | | | | Author: Shenhao Wang Discussion: https://postgr.es/m/63580B24E208E3429D94153A03C68E0901AA8002D5@G08CNEXMBPEKD02.g08.fujitsu.local
* Fix nbtree page split rmgr desc routine.Peter Geoghegan2019-09-12
| | | | | | | | | | | | Include newitemoff in rmgr desc output for nbtree page split records. In passing, correct an obsolete comment that claimed that newitemoff is only logged for _L variant nbtree page split WAL records. Both issues were oversights in commit 2c03216d831, which revamped the WAL format. Author: Peter Geoghegan Backpatch: 9.5-, where the WAL format was revamped.
* Fix usage of whole-row variables in WCO and RLS policy expressions.Tom Lane2019-09-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | Since WITH CHECK OPTION was introduced, ExecInitModifyTable has initialized WCO expressions with the wrong plan node as parent -- that is, it passed its input subplan not the ModifyTable node itself. Up to now we thought this was harmless, but bug #16006 from Vinay Banakar shows it's not: if the input node is a SubqueryScan then ExecInitWholeRowVar can get confused into doing the wrong thing. (The fact that ExecInitWholeRowVar contains such logic is certainly a horrid kluge that doesn't deserve to live, but figuring out another way to do that is a task for some other day.) Andres had already noticed the wrong-parent mistake and fixed it in commit 148e632c0, but not being aware of any user-visible consequences, he quite reasonably didn't back-patch. This patch is simply a back-patch of 148e632c0, plus addition of a test case based on bug #16006. I also added the test case to v12/HEAD, even though the bug is already fixed there. Back-patch to all supported branches. 9.4 lacks RLS policies so the new test case doesn't work there, but I'm pretty sure a test could be devised based on using a whole-row Var in a plain WITH CHECK OPTION condition. (I lack the cycles to do so myself, though.) Andres Freund and Tom Lane Discussion: https://postgr.es/m/16006-99290d2e4642cbd5@postgresql.org Discussion: https://postgr.es/m/20181205225213.hiwa3kgoxeybqcqv@alap3.anarazel.de
* Reorder two nbtree.h function prototypes.Peter Geoghegan2019-09-12
| | | | | Make the function prototype order consistent with the definition order in nbtinsert.c.
* Remove redundant _bt_truncate() comment paragraph.Peter Geoghegan2019-09-12
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* Merge two assertions to make comment clearerAlvaro Herrera2019-09-12
| | | | | | Authored by Tom Lane, after a gripe from James Coleman. Discussion: https://postgr.es/m/CAAaqYe9GD__4Crm=ddz+-XXcNhfY_V5gFYdLdmkFNq=2VHO56Q@mail.gmail.com
* Improve coverage of psql for backslash commands with \if and \elifMichael Paquier2019-09-12
| | | | | | | | | This adds tests to cover more code paths to ignore backslash commands in false branches when using \if|\elif|\else, and improves the coverage of \elif. Author: Fabien Coelho Discussion: https://postgr.es/m/alpine.DEB.2.21.1908281618520.28828@lancre
* Rearrange postmaster's startup sequence for better syslogger results.Tom Lane2019-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a second try at what commit 57431a911 tried to do, namely, launch the syslogger before we open postmaster sockets so that our messages about the sockets end up in the syslogger files. That commit fell foul of a bunch of subtle issues caused by trying to launch a postmaster child process before creating shared memory. Rather than messing with that interaction, let's postpone opening the sockets till after we launch the syslogger. This would not have been terribly safe before commit 7de19fbc0, because we relied on socket opening to detect whether any competing postmasters were using the same port number. But now that we choose IPC keys without regard to the port number, there's no interaction to worry about. Also delay creation of the external PID file (if requested) till after the sockets are open, since external code could plausibly be relying on that ordering of events. And postpone most of the work of RemovePgTempFiles() so that that potentially-slow processing still happens after we make the external PID file. We have to be a bit careful about that last though: as noted in the discussion subsequent to bug #15804, EXEC_BACKEND builds still have to clear the parameter-file temp dir before launching the syslogger. Patch by me; thanks to Michael Paquier for review/testing. Discussion: https://postgr.es/m/15804-3721117bf40fb654@postgresql.org
* Fix comment in psql's describe.cMichael Paquier2019-09-11
| | | | | | | | | | | Procedures are supported since v11 and \dfp can be used since this version, but it was not mentioned as a supported option in the description of describeFunctions() which handles \df in psql. Extracted from a larger patch. Author: Fabien Coelho Discussion: https://postgr.es/m/alpine.DEB.2.21.1908281618520.28828@lancre
* Expand properly list of TAP tests used for prove in vcregress.plMichael Paquier2019-09-11
| | | | | | | | | | | | | | | Depending on the system used, t/*.pl may not be expanded into a list of tests which can be consumed by prove when attempting to run TAP tests on a given path. Fix that by using glob() directly in the script, to make sure that a complete list of tests is provided. This has not proved to be an issue with MSVC as the list was properly expanded, but it is on Linux with perl's system(). This is extracted from a larger patch. Author: Tom Lane Discussion: https://postgr.es/m/6628.1567958876@sss.pgh.pa.us Backpatch-through: 9.4
* Allow setting statistics target for extended statisticsTomas Vondra2019-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | When building statistics, we need to decide how many rows to sample and how accurate the resulting statistics should be. Until now, it was not possible to explicitly define statistics target for extended statistics objects, the value was always computed from the per-attribute targets with a fallback to the system-wide default statistics target. That's a bit inconvenient, as it ties together the statistics target set for per-column and extended statistics. In some cases it may be useful to require larger sample / higher accuracy for extended statics (or the other way around), but with this approach that's not possible. So this commit introduces a new command, allowing to specify statistics target for individual extended statistics objects, overriding the value derived from per-attribute targets (and the system default). ALTER STATISTICS stat_name SET STATISTICS target_value; When determining statistics target for an extended statistics object we first look at this explicitly set value. When this value is -1, we fall back to the old formula, looking at the per-attribute targets first and then the system default. This means the behavior is backwards compatible with older PostgreSQL releases. Author: Tomas Vondra Discussion: https://postgr.es/m/20190618213357.vli3i23vpkset2xd@development Reviewed-by: Kirk Jamison, Dean Rasheed
* Reduce overhead of scanning the backend[] array in LISTEN/NOTIFY.Tom Lane2019-09-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | Up to now, async.c scanned its whole array of per-backend state whenever it needed to find listening backends. That's expensive if MaxBackends is large, so extend the data structure with list links that thread the active entries together. A downside of this change is that asyncQueueUnregister (unregister a listening backend at backend exit) now requires exclusive not shared lock, and it can take awhile if there are many other listening backends. We could improve the latter issue by using a doubly- not singly-linked list, but it's probably not worth the storage space; typical usage patterns for LISTEN/NOTIFY have fairly long-lived listeners. In return for that, Exec_ListenPreCommit (initially register a listening backend), SignalBackends, and asyncQueueAdvanceTail get significantly faster when MaxBackends is much larger than the number of listening backends. If most of the potential backend slots are listening, we don't win, but that's a case where the actual interprocess-signal overhead is going to swamp these considerations anyway. Martijn van Oosterhout, hacked a bit more by me Discussion: https://postgr.es/m/CADWG95vtRBFDdrx1JdT1_9nhOFw48KaeTev6F_LtDQAFVpSPhA@mail.gmail.com
* Restructure libpq code to remove some duplicityAlvaro Herrera2019-09-10
| | | | | | | | | | There was some duplicate code to run SHOW transaction_read_only to determine whether the server is read-write or read-only. Reduce it by adding another state to the state machine. Author: Hari Babu Kommi Reviewed-by: Takayuki Tsunakawa, Álvaro Herrera Discussion: https://postgr.es/m/CAJrrPGe_qgdbbN+yBgEVpd+YLHXXjTruzk6RmTMhqrFig+32ag@mail.gmail.com
* Add _bt_binsrch() scantid assertion to nbtree.Peter Geoghegan2019-09-09
| | | | | | | | | | Assert that _bt_binsrch() binary searches with scantid set in insertion scankey cannot be performed on leaf pages. Leaf-level binary searches where scantid is set must use _bt_binsrch_insert() instead. _bt_binsrch_insert() is likely to have additional responsibilities in the future, such as searching within GIN-style posting lists using scantid. It seems like a good idea to tighten things up now.
* Be more careful about port selection in src/test/ldap/.Tom Lane2019-09-09
| | | | | | | | | | | | | Don't just assume that the next port is free; it might not be, or if we're really unlucky it might even be out of the TCP range. Do it honestly with two get_free_port() calls instead. This is surely a pretty low-probability problem, but I think it explains a buildfarm failure seen today, so let's fix it. Back-patch to v11 where this script was added. Discussion: https://postgr.es/m/25124.1568052346@sss.pgh.pa.us
* Prevent msys2 conversion of "cmd /c" switch to a file pathAndrew Dunstan2019-09-09
| | | | | | | | | | Modern versions of msys2 have changed the treatment of "cmd /c" so that the runtime will try to convert the switch to a native file path. This patch adds a setting to inhibit that behaviour. Discussion: https://postgr.es/m/3227042f-cfcc-745a-57dd-fb8c471f8ddf@2ndQuadrant.com Backpatch to all live branches.
* Reorder EPQ work, to fix rowmark related bugs and improve efficiency.Andres Freund2019-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In ad0bda5d24ea I changed the EvalPlanQual machinery to store substitution tuples in slot, instead of using plain HeapTuples. The main motivation for that was that using HeapTuples will be inefficient for future tableams. But it turns out that that conversion was buggy for non-locking rowmarks - the wrong tuple descriptor was used to create the slot. As a secondary issue 5db6df0c0 changed ExecLockRows() to begin EPQ earlier, to allow to fetch the locked rows directly into the EPQ slots, instead of having to copy tuples around. Unfortunately, as Tom complained, that forces some expensive initialization to happen earlier. As a third issue, the test coverage for EPQ was clearly insufficient. Fixing the first issue is unfortunately not trivial: Non-locked row marks were fetched at the start of EPQ, and we don't have the type information for the rowmarks available at that point. While we could change that, it's not easy. It might be worthwhile to change that at some point, but to fix this bug, it seems better to delay fetching non-locking rowmarks when they're actually needed, rather than eagerly. They're referenced at most once, and in cases where EPQ fails, might never be referenced. Fetching them when needed also increases locality a bit. To be able to fetch rowmarks during execution, rather than initialization, we need to be able to access the active EPQState, as that contains necessary data. To do so move EPQ related data from EState to EPQState, and, only for EStates creates as part of EPQ, reference the associated EPQState from EState. To fix the second issue, change EPQ initialization to allow use of EvalPlanQualSlot() to be used before EvalPlanQualBegin() (but obviously still requiring EvalPlanQualInit() to have been done). As these changes made struct EState harder to understand, e.g. by adding multiple EStates, significantly reorder the members, and add a lot more comments. Also add a few more EPQ tests, including one that fails for the first issue above. More is needed. Reported-By: yi huang Author: Andres Freund Reviewed-By: Tom Lane Discussion: https://postgr.es/m/CAHU7rYZo_C4ULsAx_LAj8az9zqgrD8WDd4hTegDTMM1LMqrBsg@mail.gmail.com https://postgr.es/m/24530.1562686693@sss.pgh.pa.us Backpatch: 12-, where the EPQ changes were introduced
* Fix handling of non-key columns get_index_column_opclass()Alexander Korotkov2019-09-09
| | | | | | | | | | | f2e40380 introduces support of non-key attributes in GiST indexes. Then if get_index_column_opclass() is asked by gistproperty() to get an opclass of non-key column, it returns garbage past oidvector value. This commit fixes that by making get_index_column_opclass() return InvalidOid in this case. Discussion: https://postgr.es/m/20190902231948.GA5343%40alvherre.pgsql Author: Nikita Glukhov, Alexander Korotkov Backpatch-through: 12
* Improve new AND CHAIN testsPeter Eisentraut2019-09-09
| | | | | | | Tweak the tests so that we're not just testing the default setting of transaction_read_only. Reported-by: fn ln <emuser20140816@gmail.com>
* Fix RelationIdGetRelation calls that weren't bothering with error checks.Tom Lane2019-09-08
| | | | | | | | | | | | Some of these are quite old, but that doesn't make them not bugs. We'd rather report a failure via elog than SIGSEGV. While at it, uniformly spell the error check as !RelationIsValid(rel) rather than a bare rel == NULL test. The machine code is the same but it seems better to be consistent. Coverity complained about this today, not sure why, because the mistake is in fact old.
* Fix handling of NULL distances in KNN-GiSTAlexander Korotkov2019-09-08
| | | | | | | | | | | | | | In order to implement NULL LAST semantic GiST previously assumed distance to the NULL value to be Inf. However, our distance functions can return Inf and NaN for non-null values. In such cases, NULL LAST semantic appears to be broken. This commit fixes that by introducing separate array of null flags for distances. Backpatch to all supported versions. Discussion: https://postgr.es/m/CAPpHfdsNvNdA0DBS%2BwMpFrgwT6C3-q50sFVGLSiuWnV3FqOJuQ%40mail.gmail.com Author: Alexander Korotkov Backpatch-through: 9.4
* Fix handling Inf and Nan values in GiST pairing heap comparatorAlexander Korotkov2019-09-08
| | | | | | | | | | | | | | | | Previously plain float comparison was used in GiST pairing heap. Such comparison doesn't provide proper ordering for value sets containing Inf and Nan values. This commit fixes that by usage of float8_cmp_internal(). Note, there is remaining problem with NULL distances, which are represented as Inf in pairing heap. It would be fixes in subsequent commit. Backpatch to all supported versions. Reported-by: Andrey Borodin Discussion: https://postgr.es/m/CAPpHfdsNvNdA0DBS%2BwMpFrgwT6C3-q50sFVGLSiuWnV3FqOJuQ%40mail.gmail.com Author: Alexander Korotkov Reviewed-by: Heikki Linnakangas Backpatch-through: 9.4
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