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* Pass the source text for a parallel query to the workers.Robert Haas2017-02-22
| | | | | | | | | With this change, you can see the query that a parallel worker is executing in pg_stat_activity, and if the worker crashes you can see what query it was executing when it crashed. Rafia Sabih, reviewed by Kuntal Ghosh and Amit Kapila and slightly revised by me.
* Shut down Gather's children before shutting down Gather itself.Robert Haas2017-02-22
| | | | | | | | | | | | | It turns out that the original shutdown order here does not work well. Multiple people attempting to develop further parallel query patches have discovered that they need to do cleanup before the DSM goes away, and you can't do that if the parent node gets cleaned up first. Patch by me, reviewed by KaiGai Kohei and Dilip Kumar. Discussion: http://postgr.es/m/CA+TgmoY6bOc1YnhcAQnMfCBDbsJzROQ3sYxSAL-SYB5tMJcTKg@mail.gmail.com Discussion: http://postgr.es/m/9A28C8860F777E439AA12E8AEA7694F8012AEB82@BPXM15GP.gisp.nec.co.jp Discussion: http://postgr.es/m/CA+TgmoYuPOc=+xrG1v0fCsoLbKAab9F1ddOeaaiLMzKOiBar1Q@mail.gmail.com
* Suppress unused-variable warning.Tom Lane2017-02-21
| | | | | | Rearrange so we don't have an unused variable in disable-cassert case. Discussion: https://postgr.es/m/CAMkU=1x63f2QyFTeas83xJqD+Hm1PBuok1LrzYzS-OngDzYOVA@mail.gmail.com
* Fix sloppy handling of corner-case errors in fd.c.Tom Lane2017-02-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several places in fd.c had badly-thought-through handling of error returns from lseek() and close(). The fact that those would seldom fail on valid FDs is probably the reason we've not noticed this up to now; but if they did fail, we'd get quite confused. LruDelete and LruInsert actually just Assert'd that lseek never fails, which is pretty awful on its face. In LruDelete, we indeed can't throw an error, because that's likely to get called during error abort and so throwing an error would probably just lead to an infinite loop. But by the same token, throwing an error from the close() right after that was ill-advised, not to mention that it would've left the LRU state corrupted since we'd already unlinked the VFD from the list. I also noticed that really, most of the time, we should know the current seek position and it shouldn't be necessary to do an lseek here at all. As patched, if we don't have a seek position and an lseek attempt doesn't give us one, we'll close the file but then subsequent re-open attempts will fail (except in the somewhat-unlikely case that a FileSeek(SEEK_SET) call comes between and allows us to re-establish a known target seek position). This isn't great but it won't result in any state corruption. Meanwhile, having an Assert instead of an honest test in LruInsert is really dangerous: if that lseek failed, a subsequent read or write would read or write from the start of the file, not where the caller expected, leading to data corruption. In both LruDelete and FileClose, if close() fails, just LOG that and mark the VFD closed anyway. Possibly leaking an FD is preferable to getting into an infinite loop or corrupting the VFD list. Besides, as far as I can tell from the POSIX spec, it's unspecified whether or not the file has been closed, so treating it as still open could be the wrong thing anyhow. I also fixed a number of other places that were being sloppy about behaving correctly when the seekPos is unknown. Also, I changed FileSeek to return -1 with EINVAL for the cases where it detects a bad offset, rather than throwing a hard elog(ERROR). It seemed pretty inconsistent that some bad-offset cases would get a failure return while others got elog(ERROR). It was missing an offset validity check for the SEEK_CUR case on a closed file, too. Back-patch to all supported branches, since all this code is fundamentally identical in all of them. Discussion: https://postgr.es/m/2982.1487617365@sss.pgh.pa.us
* Add tests for two-phase commitAlvaro Herrera2017-02-21
| | | | | | | | | | There's some ongoing performance work on this area, so let's make sure we don't break things. Extracted from a larger patch originally by Stas Kelvich. Authors: Stas Kelvich, Nikhil Sontakke, Michael Paquier Discussion: https://postgr.es/m/CAMGcDxfsuLLOg=h5cTg3g77Jjk-UGnt=RW7zK57zBSoFsapiWA@mail.gmail.com
* Fix whitespacePeter Eisentraut2017-02-21
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* Fix typo in comment.Fujii Masao2017-02-22
| | | | neha khatri
* Fix connection leak in DROP SUBSCRIPTION command.Fujii Masao2017-02-22
| | | | | Previously the command forgot to close the connection to the publisher when it failed to drop the replication slot.
* Make walsender always initialize the buffers.Fujii Masao2017-02-22
| | | | | | | | | | | | | Walsender uses the local buffers for each outgoing and incoming message. Previously when creating replication slot, walsender forgot to initialize one of them and which can cause the segmentation fault error. To fix this issue, this commit changes walsender so that it always initialize them before it executes the requested replication command. Back-patch to 9.4 where replication slot was introduced. Problem report and initial patch by Stas Kelvich, modified by me. Report: https://www.postgresql.org/message-id/A1E9CB90-1FAC-4CAD-8DBA-9AA62A6E97C5@postgrespro.ru
* Remove confusing comment about unsupported feature.Fujii Masao2017-02-22
| | | | | The initial table synchronization feature has not been supported yet, but there was the confusing header comment about it in logical/worker.c.
* Use less-generic table name in new regression test case.Tom Lane2017-02-21
| | | | | | | | | Creating global objects named "foo" isn't an especially wise thing, but especially not in a test script that has already used that name for something else, and most especially not in a script that runs in parallel with other scripts that use that name :-( Per buildfarm.
* Make more use of castNode()Peter Eisentraut2017-02-21
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* Drop support for Python 2.3Peter Eisentraut2017-02-21
| | | | | | | | | | | There is no specific reason for this right now, but keeping support for old Python versions around indefinitely increases the maintenance burden. The oldest supported Python version is now Python 2.4, which is still shipped in RHEL/CentOS 5 by default. In configure, add a check for the required Python version and give a friendly error message for an old version, instead of relying on an obscure build error later on.
* Improve error message for misuse of TZ, tz, OF formatting patterns.Tom Lane2017-02-20
| | | | | | | | | | Be specific about which pattern is being complained of, and avoid saying "it's not supported in to_date", which is just confusing if the error is actually coming out of to_timestamp. We can phrase it as "is only supported in to_char", instead. Also, use the term "formatting field" not "format pattern", because other error messages in the same file prefer that terminology. (This isn't terribly consistent with the documentation, so maybe we should change all these error messages?)
* Make src/interfaces/libpq/test clean up after itself.Tom Lane2017-02-19
| | | | | It failed to remove a .o file during "make clean", and it lacked a .gitignore file entirely.
* Dept of second thoughts: rename new perl script.Tom Lane2017-02-19
| | | | | | | It didn't take long at all for me to become irritated that the original choice of name for this script resulted in "warning" showing up in several places in build logs, because I tend to grep for that. Change the script name to avoid that.
* Adjust PL/Tcl regression test to dodge a possible bug or zone dependency.Tom Lane2017-02-19
| | | | | | | | | | | One case in the PL/Tcl tests is observed to fail on RHEL5 with a Turkish time zone setting. It's not clear if this is an old Tcl bug or something odd about the zone data, but in any case that test is meant to see if the Tcl [clock] command works at all, not what its corner-case behaviors are. Therefore we have no need to test exactly which week a Sunday midnight is considered to fall into. Probe the following Tuesday instead. Discussion: https://postgr.es/m/797.1487517822@sss.pgh.pa.us
* Suppress "unused variable" warnings with older versions of flex.Tom Lane2017-02-19
| | | | | | | | | | | | | | Versions of flex before 2.5.36 might generate code that results in an "unused variable" warning, when using %option reentrant. Historically we've worked around that by specifying -Wno-error, but that's an unsatisfying solution. The official "fix" for this was just to insert a dummy reference to the variable, so write a small perl script that edits the generated C code similarly. The MSVC side of this is untested, but the buildfarm should soon reveal if I broke that. Discussion: https://postgr.es/m/25456.1487437842@sss.pgh.pa.us
* Make partitions automatically inherit OIDs.Robert Haas2017-02-19
| | | | | | | | | | Previously, if the parent was specified as WITH OIDS, each child also had to be explicitly specified as WITH OIDS. Amit Langote, per a report from Simon Riggs. Some additional work on the documentation changes by me. Discussion: http://postgr.es/m/CANP8+jJBpWocfKrbJcaf3iBt9E3U=WPE_NC8YE6rye+YJ1sYnQ@mail.gmail.com
* Add optimizer and executor support for parallel index-only scans.Robert Haas2017-02-19
| | | | | | | | | | | | | Commit 5262f7a4fc44f651241d2ff1fa688dd664a34874 added similar support for parallel index scans; this extends that work to index-only scans. As with parallel index scans, this requires support from the index AM, so currently parallel index-only scans will only be possible for btree indexes. Rafia Sabih, reviewed and tested by Rahila Syed, Tushar Ahuja, and Amit Kapila Discussion: http://postgr.es/m/CAOGQiiPEAs4C=TBp0XShxBvnWXuzGL2u++Hm1=qnCpd6_Mf8Fw@mail.gmail.com
* Make dsa_allocate interface more like MemoryContextAlloc.Robert Haas2017-02-19
| | | | | | | | | | | | | | | | A new function dsa_allocate_extended now takes flags which indicate that huge allocations should be permitted, that out-of-memory conditions should not throw an error, and/or that the returned memory should be zero-filled, just like MemoryContextAllocateExtended. Commit 9acb85597f1223ac26a5b19a9345849c43d0ff54, which added dsa_allocate0, was broken because it failed to account for the possibility that dsa_allocate() might return InvalidDsaPointer. This fixes that problem along the way. Thomas Munro, with some comment changes by me. Discussion: http://postgr.es/m/CA+Tgmobt7CcF_uQP2UQwWmu4K9qCHehMJP9_9m1urwP8hbOeHQ@mail.gmail.com
* Fix help message for pg_basebackup -RMagnus Hagander2017-02-18
| | | | | | The recovery.conf file that's generated is specifically for replication, and not needed (or wanted) for regular backup restore, so indicate that in the message.
* Optimize query for information_schema.constraint_column_usagePeter Eisentraut2017-02-17
| | | | | | | | | | The way the old query was written prevented some join optimizations because the join conditions were hidden inside a CASE expression. With a large number of constraints, the query became unreasonably slow. The new query performs much better. From: Alexey Bashtanov <bashtanov@imap.cc> Reviewed-by: Ashutosh Bapat <ashutosh.bapat@enterprisedb.com>
* pg_dump: Message style improvementsPeter Eisentraut2017-02-17
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* Document usage of COPT environment variable for adjusting configure flags.Tom Lane2017-02-17
| | | | | | | Also add to the existing rather half-baked description of PROFILE, which does exactly the same thing, but I think people use it differently. Discussion: https://postgr.es/m/16461.1487361849@sss.pgh.pa.us
* pg_dump: Fix typo in queryPeter Eisentraut2017-02-17
| | | | | This could lead to incorrect dumping of language privileges in some cases, which is probably a rare situation.
* Remove redundant coverage targetPeter Eisentraut2017-02-17
| | | | | This was probably forgotten to be removed when general recursion support was added.
* Fix typo on commentPeter Eisentraut2017-02-16
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* Add new function dsa_allocate0.Robert Haas2017-02-16
| | | | | | | This does the same thing as dsa_allocate, except that the memory is guaranteed to be zero-filled on return. Dilip Kumar, adjusted by me.
* Avoid crash in ALTER TABLE not_partitioned DETACH PARTITION.Robert Haas2017-02-16
| | | | Amit Langote, reviewed and slightly changed by me.
* Formatting and docs corrections for logical decoding output plugins.Tom Lane2017-02-15
| | | | | | | | | Make the typedefs for output plugins consistent with project style; they were previously not even consistent with each other as to layout or inclusion of parameter names. Make the documentation look the same, and fix errors therein (missing and misdescribed parameters). Back-patch because of the documentation bugs.
* Make sure that hash join's bulk-tuple-transfer loops are interruptible.Tom Lane2017-02-15
| | | | | | | | | | | | | | | | | | The loops in ExecHashJoinNewBatch(), ExecHashIncreaseNumBatches(), and ExecHashRemoveNextSkewBucket() are all capable of iterating over many tuples without ever doing a CHECK_FOR_INTERRUPTS, so that the backend might fail to respond to SIGINT or SIGTERM for an unreasonably long time. Fix that. In the case of ExecHashJoinNewBatch(), it seems useful to put the added CHECK_FOR_INTERRUPTS into ExecHashJoinGetSavedTuple() rather than directly in the loop, because that will also ensure that both principal code paths through ExecHashJoinOuterGetTuple() will do a CHECK_FOR_INTERRUPTS, which seems like a good idea to avoid surprises. Back-patch to all supported branches. Tom Lane and Thomas Munro Discussion: https://postgr.es/m/6044.1487121720@sss.pgh.pa.us
* Fix tab completion for "ALTER SYSTEM SET variable ...".Tom Lane2017-02-15
| | | | | | | | | | | | | It wouldn't complete "TO" after the variable name, which is certainly minor enough. But since we do complete "TO" after "SET variable ...", and since this case used to work pre-9.6, I think this is a bug. Also, fix the query used to collect the variable names; whoever last touched it evidently didn't understand how the pieces are supposed to fit together. It accidentally worked anyway, because readline ignores irrelevant completions, but it was randomly unlike the ones around it, and could be a source of actual bugs if someone copied it as a prototype for another query.
* Fix YA unwanted behavioral difference with operator_precedence_warning.Tom Lane2017-02-15
| | | | | | | | | | | | | | | | Jeff Janes noted that the error cursor position shown for some errors would vary when operator_precedence_warning is turned on. We'd prefer that option to have no undocumented effects, so this isn't desirable. To fix, make sure that an AEXPR_PAREN node has the same exprLocation as its child node. (Note: it would be a little cheaper to use @2 here instead of an exprLocation call, but there are cases where that wouldn't produce the identical answer, so don't do it like that.) Back-patch to 9.5 where this feature was introduced. Discussion: https://postgr.es/m/CAMkU=1ykK+VhhcQ4Ky8KBo9FoaUJH3f3rDQB8TkTXi-ZsBRUkQ@mail.gmail.com
* Add optimizer and executor support for parallel index scans.Robert Haas2017-02-15
| | | | | | | | | | | | In combination with 569174f1be92be93f5366212cc46960d28a5c5cd, which taught the btree AM how to perform parallel index scans, this allows parallel index scan plans on btree indexes. This infrastructure should be general enough to support parallel index scans for other index AMs as well, if someone updates them to support parallel scans. Amit Kapila, reviewed and tested by Anastasia Lubennikova, Tushar Ahuja, and Haribabu Kommi, and me.
* Replace min_parallel_relation_size with two new GUCs.Robert Haas2017-02-15
| | | | | | | | | | | | | | | | | | | | | | | | | | When min_parallel_relation_size was added, the only supported type of parallel scan was a parallel sequential scan, but there are pending patches for parallel index scan, parallel index-only scan, and parallel bitmap heap scan. Those patches introduce two new types of complications: first, what's relevant is not really the total size of the relation but the portion of it that we will scan; and second, index pages and heap pages shouldn't necessarily be treated in exactly the same way. Typically, the number of index pages will be quite small, but that doesn't necessarily mean that a parallel index scan can't pay off. Therefore, we introduce min_parallel_table_scan_size, which works out a degree of parallelism for scans based on the number of table pages that will be scanned (and which is therefore equivalent to min_parallel_relation_size for parallel sequential scans) and also min_parallel_index_scan_size which can be used to work out a degree of parallelism based on the number of index pages that will be scanned. Amit Kapila and Robert Haas Discussion: http://postgr.es/m/CAA4eK1KowGSYYVpd2qPpaPPA5R90r++QwDFbrRECTE9H_HvpOg@mail.gmail.com Discussion: http://postgr.es/m/CAA4eK1+TnM4pXQbvn7OXqam+k_HZqb0ROZUMxOiL6DWJYCyYow@mail.gmail.com
* Fix wrong articles in pg_proc descriptions.Robert Haas2017-02-15
| | | | | | | This technically should involve a catversion bump, but that seems pedantic, so I skipped it. Report and patch by David Christensen.
* libpq: Make target_session_attrs=read-write consume empty result.Robert Haas2017-02-15
| | | | | | | Otherwise, the leftover empty result can cause problems in some situations. Michael Paquier and Ashutosh Bapat, per a report from Higuchi Daisuke
* pg_upgrade: Fix problems caused by renaming pg_resetxlog.Robert Haas2017-02-15
| | | | | | | | Commit 85c11324cabaddcfaf3347df78555b30d27c5b5a renamed pg_resetxlog to pg_resetwal, but didn't make pg_upgrade smart enough to cope with the situation. Michael Paquier, per a complaint from Jeff Janes
* Add CREATE COLLATION IF NOT EXISTS clausePeter Eisentraut2017-02-15
| | | | | | The core of the functionality was already implemented when pg_import_system_collations was added. This just exposes it as an option in the SQL command.
* btree: Support parallel index scans.Robert Haas2017-02-15
| | | | | | | | | | | | | This isn't exposed to the optimizer or the executor yet; we'll add support for those things in a separate patch. But this puts the basic mechanism in place: several processes can attach to a parallel btree index scan, and each one will get a subset of the tuples that would have been produced by a non-parallel scan. Each index page becomes the responsibility of a single worker, which then returns all of the TIDs on that page. Rahila Syed, Amit Kapila, Robert Haas, reviewed and tested by Anastasia Lubennikova, Tushar Ahuja, and Haribabu Kommi.
* Fix typo in comment.Robert Haas2017-02-14
| | | | Higuchi Daisuke
* Allow parallel workers to execute subplans.Robert Haas2017-02-14
| | | | | | | | | | | | | | | This doesn't do anything to make Param nodes anything other than parallel-restricted, so this only helps with uncorrelated subplans, and it's not necessarily very cheap because each worker will run the subplan separately (just as a Hash Join will build a separate copy of the hash table in each participating process), but it's a first step toward supporting cases that are more likely to help in practice, and is occasionally useful on its own. Amit Kapila, reviewed and tested by Rafia Sabih, Dilip Kumar, and me. Discussion: http://postgr.es/m/CAA4eK1+e8Z45D2n+rnDMDYsVEb5iW7jqaCH_tvPMYau=1Rru9w@mail.gmail.com
* Split index xlog headers from other private index headers.Robert Haas2017-02-14
| | | | | | | | | | | | | The xlog-specific headers need to be included in both frontend code - specifically, pg_waldump - and the backend, but the remainder of the private headers for each index are only needed by the backend. By splitting the xlog stuff out into separate headers, pg_waldump pulls in fewer backend headers, which is a good thing. Patch by me, reviewed by Michael Paquier and Andres Freund, per a complaint from Dilip Kumar. Discussion: http://postgr.es/m/CA+TgmoZ=F=GkxV0YEv-A8tb+AEGy_Qa7GSiJ8deBKFATnzfEug@mail.gmail.com
* Minor fixes for WAL consistency checking.Robert Haas2017-02-14
| | | | | | Michael Paquier, reviewed and slightly revised by me. Discussion: http://postgr.es/m/CAB7nPqRzCQb=vdfHvMtP0HMLBHU6z1aGdo4GJsUP-HP8jx+Pkw@mail.gmail.com
* Don't disallow dropping NOT NULL for a list partition key.Robert Haas2017-02-14
| | | | | | | Range partitioning doesn't support nulls in the partitioning columns, but list partitioning does. Amit Langote, per a complaint from Amul Sul
* Remove duplicate code in planner.c.Tom Lane2017-02-14
| | | | | | | I noticed while hacking on join UNION transforms that planner.c's function get_base_rel_indexes() just duplicates the functionality of get_relids_in_jointree(). It doesn't even have the excuse of being older code :-(. Drop it and use the latter function instead.
* Replace reference to "xlog-method" with "wal-method" in error message.Fujii Masao2017-02-15
| | | | | Commit 62e8b38 renamed "--xlog-method" option for pg_basebackup to "--wal-method", but forgot to update the error message mentioning that option.
* Remove contrib/tsearch2.Robert Haas2017-02-13
| | | | | | | | | | | | This module was intended to ease migrations of applications that used the pre-8.3 version of text search to the in-core version introduced in that release. However, since all pre-8.3 releases of the database have been out of support for more than 5 years at this point, we expect that few people are depending on it at this point. If some people still need it, nothing prevents it from being maintained as a separate extension, outside of core. Discussion: http://postgr.es/m/CA+Tgmob5R8aDHiFRTQsSJbT1oreKg2FOSBrC=2f4tqEH3dOMAg@mail.gmail.com
* Ignore tablespace ACLs when ignoring schema ACLs.Noah Misch2017-02-12
| | | | | | | | | | | The ALTER TABLE ALTER TYPE implementation can issue DROP INDEX and CREATE INDEX to refit existing indexes for the new column type. Since this CREATE INDEX is an implementation detail of an index alteration, the ensuing DefineIndex() should skip ACL checks specific to index creation. It already skips the namespace ACL check. Make it skip the tablespace ACL check, too. Back-patch to 9.2 (all supported versions). Reviewed by Tom Lane.
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