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checkExtensionMembership() set the DUMP_COMPONENT_SECLABEL and DUMP_COMPONENT_POLICY flags for extension member objects, even though we lack any infrastructure for tracking extensions' initial settings of these properties. This is not OK. The result was that a dump would always include commands to set these properties for extension objects that have them, with at least three negative consequences: 1. The restoring user might not have privilege to set these properties on these objects. 2. The properties might be incorrect/irrelevant for the version of the extension that's installed in the destination database. 3. The dump itself might fail, in the case of RLS properties attached to extension tables that the dumping user lacks privilege to LOCK. (That's because we must get at least AccessShareLock to ensure that we don't fail while trying to decompile the RLS expressions.) When and if somebody cares to invent initial-state infrastructure for extensions' RLS policies and security labels, we could think about finding another way around problem #3. But in the absence of such infrastructure, this whole thing is just wrong and we shouldn't do it. (Note: this applies only to ordinary dumps; binary-upgrade dumps still dump and restore extension member objects separately, with all properties.) Tom Lane and Jacob Champion. Back-patch to all supported branches. Discussion: https://postgr.es/m/00d46a48-3324-d9a0-49bf-e7f0f11d1038@timescale.com
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Remove a redundant comment, and document pg_class.reltablespace properly in catalogs.sgml. After commits a36c84c, 8725958 and others. Backpatch to 12. Discussion: https://postgr.es/m/202403191013.w2kr7wqlamqz@alvherre.pgsql
Thanks to commits ea18eb7, b6ee30e, and 19a829a, the 002_blocks.pl test now consistently passes, so we can remove this temporary debugging code. This reverts commit 5ddf997. Discussion: https://postgr.es/m/20240314210010.GA3056455%40nathanxps13
Shows a measurable speedup when processing UTF-8 data, such as with the new builtin collation provider. Discussion: https://postgr.es/m/163f4e2190cdf67f67016044e503c5004547e5a9.camel@j-davis.com Reviewed-by: Peter Eisentraut
This commit limits the maximum value of wal_summary_keep_time to INT_MAX / SECS_PER_MINUTE to avoid overflow when it is converted to seconds. In passing, use the HOURS_PER_DAY, MINS_PER_HOUR, and SECS_PER_MINUTE macros in the code for this GUC instead of hard- coding those values. Discussion: https://postgr.es/m/20240314210010.GA3056455%40nathanxps13
In combination with to_regtype, this allows converting a string to the "canonicalized" form emitted by format_type. That usage requires parsing the string twice, which is slightly annoying but not really too expensive. We considered alternatives such as returning a record type, but that way was notationally uglier than this, and possibly less flexible. Like to_regtype(), we'd rather that this return NULL for any bad input, but the underlying type-parsing logic isn't yet capable of not throwing syntax errors. Adjust the documentation for both functions to point that out. In passing, fix up a couple of nearby entries in the System Catalog Information Functions table that had not gotten the word about our since-v13 convention for displaying function usage examples. David Wheeler and Erik Wienhold, reviewed by Pavel Stehule, Jim Jones, and others. Discussion: https://postgr.es/m/DF2324CA-2673-4ABE-B382-26B5770B6AA3@justatheory.com
This essentially reverts commit 69eb643, which added a fast path in Catalog::ParseData, but neglected to preserve the behavior of adding a line_number field in each hash. That makes it impossible for genbki.pl to provide any localization of error reports, which is bad enough; but actually the affected error reports failed entirely, producing useless bleats like "use of undefined value in sprintf". 69eb643 claimed to get a 15% speedup, but I'm not sure I believe that: the time to rebuild the bki files changes by less than 1% for me. In any case, making debugging of mistakes in .dat files more difficult would not be justified by even an order of magnitude speedup here; it's just not that big a chunk of the total build time. Per report from David Wheeler. Although it's also broken in v16, I don't think this is worth a back-patch, since we're very unlikely to touch the v16 catalog data again. Discussion: https://postgr.es/m/19238.1710953049@sss.pgh.pa.us
TIDStore is a data structure designed to efficiently store large sets of TIDs. For TID storage, it employs a radix tree, where the key is a block number, and the value is a bitmap representing offset numbers. The TIDStore can be created on a DSA area and used by multiple backend processes simultaneously. There are potential future users such as tidbitmap.c, though it's very likely the interface will need to evolve as we come to understand the needs of different kinds of users. For example, we can support updating the offset bitmap of existing values. Currently, the TIDStore is not used for anything yet, aside from the test code. But an upcoming patch will use it. This includes a unit test module, in src/test/modules/test_tidstore. Co-authored-by: John Naylor Discussion: https://postgr.es/m/CAD21AoAfOZvmfR0j8VmZorZjL7RhTiQdVttNuC4W-Shdc2a-AA%40mail.gmail.com
…-R option. Commit cca97ce allowed dbname in pg_basebackup connstring and in this commit we allow it to be written in postgresql.auto.conf when -R option is used. The database name in the connection string will be used by the logical replication slot synchronization on standby. The dbname will be recorded only if specified explicitly in the connection string or environment variable. Masahiko Sawada hasn't reviewed the code in detail but endorsed the idea. Author: Vignesh C, Kuroda Hayato Reviewed-by: Amit Kapila Discussion: https://postgr.es/m/CAB8KJ=hdKdg+UeXhReeHpHA6N6v3e0qFF+ZsPFHk9_ThWKf=2A@mail.gmail.com
This introduces the following SQL/JSON functions for querying JSON data using jsonpath expressions: JSON_EXISTS(), which can be used to apply a jsonpath expression to a JSON value to check if it yields any values. JSON_QUERY(), which can be used to to apply a jsonpath expression to a JSON value to get a JSON object, an array, or a string. There are various options to control whether multi-value result uses array wrappers and whether the singleton scalar strings are quoted or not. JSON_VALUE(), which can be used to apply a jsonpath expression to a JSON value to return a single scalar value, producing an error if it multiple values are matched. Both JSON_VALUE() and JSON_QUERY() functions have options for handling EMPTY and ERROR conditions, which can be used to specify the behavior when no values are matched and when an error occurs during jsonpath evaluation, respectively. Author: Nikita Glukhov <n.gluhov@postgrespro.ru> Author: Teodor Sigaev <teodor@sigaev.ru> Author: Oleg Bartunov <obartunov@gmail.com> Author: Alexander Korotkov <aekorotkov@gmail.com> Author: Andrew Dunstan <andrew@dunslane.net> Author: Amit Langote <amitlangote09@gmail.com> Author: Peter Eisentraut <peter@eisentraut.org> Author: Jian He <jian.universality@gmail.com> Reviewers have included (in no particular order): Andres Freund, Alexander Korotkov, Pavel Stehule, Andrew Alsup, Erik Rijkers, Zihong Yu, Himanshu Upadhyaya, Daniel Gustafsson, Justin Pryzby, Álvaro Herrera, Jian He, Anton A. Melnikov, Nikita Malakhov, Peter Eisentraut, Tomas Vondra Discussion: https://postgr.es/m/cd0bb935-0158-78a7-08b5-904886deac4b@postgrespro.ru Discussion: https://postgr.es/m/20220616233130.rparivafipt6doj3@alap3.anarazel.de Discussion: https://postgr.es/m/abd9b83b-aa66-f230-3d6d-734817f0995d%40postgresql.org Discussion: https://postgr.es/m/CA+HiwqHROpf9e644D8BRqYvaAPmgBZVup-xKMDPk-nd4EpgzHw@mail.gmail.com Discussion: https://postgr.es/m/CA+HiwqE4XTdfb1nW=Ojoy_tQSRhYt-q_kb6i5d4xcKyrLC1Nbg@mail.gmail.com
The buildfarm animal parula has been sporadically failing in the partition_prune test for the past week or so. It appears like an auto-vacuum or auto-analyze has run on one of the partitions of the "ab" table, causing the plan to change. This is unexpected as the table is empty. Here we install some telemetry to find out if this is the case. This also joins in pg_index to see if something has gone wrong with the index which could result in the planner being unable to use that index. We can revert this once we've figured out the cause of the plan instability. Reported-by: Tom Lane Investigation-by: Tom Lane Discussion: https://postgr.es/m/4009739.1710878318%40sss.pgh.pa.us
The SASL exchange callback returned state in to output variables: done and success. This refactors that logic by introducing a new return variable of type SASLStatus which makes the code easier to read and understand, and prepares for future SASL exchanges which operate asynchronously. This was extracted from a larger patchset to introduce OAuthBearer authentication and authorization. Author: Jacob Champion <jacob.champion@enterprisedb.com> Discussion: https://postgr.es/m/d1b467a78e0e36ed85a09adf979d04cf124a9d4b.camel@vmware.com
This refactors the SASL init flow to set password_needed on the two SCRAM exchanges currently supported. The code already required this but was set up in such a way that all SASL exchanges required using a password, a restriction which may not hold for all exchanges (the example at hand being the proposed OAuthbearer exchange). This was extracted from a larger patchset to introduce OAuthBearer authentication and authorization. Author: Jacob Champion <jacob.champion@enterprisedb.com> Discussion: https://postgr.es/m/d1b467a78e0e36ed85a09adf979d04cf124a9d4b.camel@vmware.com
Presently, one of the lines in README.md has trailing whitespace, which was added by commit 363eb05 to maintain a line break that was in the non-Markdown version. Instead of changing .gitattributes, let's match this paragraph's style with the style of the following paragraph, thereby removing the trailing whitespace. Reported-by: Peter Eisentraut Reviewed-by: Daniel Gustafsson Discussion: https://postgr.es/m/c0a4e906-c6fe-4519-bd15-28dfcd03fdb2%40eisentraut.org
The old text claims that HOT completely removes old row versions. It was unclear whether it just meant the tuples themselves, or the tuples together with their line pointers. If it meant the former, it was wrong because we can remove dead row versions even when no HOT updates have occurred, so it's not describing a benefit of HOT. If it meant the latter, it was wrong because HOT doesn't allow reclaiming the root tuple's line pointer. This section does seems like it's intended to be more of an informal introduction to HOT than a precise technical description of every detail of how it works, but we still don't want it to say things that are just not true, so update the text enough to avoid that. Patch by me, reviewed by James Coleman (although he would have preferred more extensive changes) and Shubham Khanna. Discussion: http://postgr.es/m/CA+TgmobH6DPmR-u--Xgeg8cYUwhDhypNsv38nDrAJyf_xno=TQ@mail.gmail.com
The new table AM method free_rd_amcache is responsible for freeing all the memory related to rd_amcache and setting free_rd_amcache to NULL. If the new method is not specified, we still assume rd_amcache to be a single chunk of memory, which could be just pfree'd. Discussion: https://postgr.es/m/CAPpHfdurb9ycV8udYqM%3Do0sPS66PJ4RCBM1g-bBpvzUfogY0EA%40mail.gmail.com Reviewed-by: Matthias van de Meent, Mark Dilger, Pavel Borisov Reviewed-by: Nikita Malakhov, Japin Li
This allows table AM to return a native tuple slot even if VirtualTupleTableSlot is given as an input. Native tuple slots have knowledge about system attributes, which could be accessed in the future. table_multi_insert() method already can modify the input 'slots' array. Discussion: https://postgr.es/m/CAPpHfdurb9ycV8udYqM%3Do0sPS66PJ4RCBM1g-bBpvzUfogY0EA%40mail.gmail.com Reviewed-by: Matthias van de Meent, Mark Dilger, Pavel Borisov Reviewed-by: Nikita Malakhov, Japin Li
This allows us to abstract how/whether table AM uses transaction identifiers. A custom table AM can use a custom slot, which may not store xmin directly, but determine the tuple belonging to the current transaction in the other way. Discussion: https://postgr.es/m/CAPpHfdurb9ycV8udYqM%3Do0sPS66PJ4RCBM1g-bBpvzUfogY0EA%40mail.gmail.com Reviewed-by: Matthias van de Meent, Mark Dilger, Pavel Borisov Reviewed-by: Nikita Malakhov, Japin Li
This also enables hash join and hash aggregation on ltree columns. Tommy Pavlicek, reviewed by jian he Discussion: https://postgr.es/m/CAEhP-W9ZEoHeaP_nKnPCVd_o1c3BAUvq1gWHrq8EbkNRiS9CvQ@mail.gmail.com
Commit 9a83d56 added support for allowing pg_dumpall to dump roles without including passwords, which accidentally made dumps omit COMMENTs on roles. This fixes it by using pg_authid to get the comment. Backpatch to all supported versions. Patch simultaneously written independently by Álvaro and myself. Author: Álvaro Herrera <alvherre@alvh.no-ip.org> Author: Daniel Gustafsson <daniel@yesql.se> Reported-by: Bartosz Chroł <bartosz.chrol@handen.pl> Discussion: https://postgr.es/m/AS8P194MB1271CDA0ADCA7B75FCD8E767F7332@AS8P194MB1271.EURP194.PROD.OUTLOOK.COM Discussion: https://postgr.es/m/CAEP4nAz9V4H41_4ESJd1Gf0v%3DdevkqO1%3Dpo91jUw-GJSx8Hxqg%40mail.gmail.com Backpatch-through: v12
The error message being fixed was added in 6185c97. While at it, add an "a" to the sentence. Reported-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com> Discussion: https://postgr.es/m/20240322.095149.895185546948714852.horikyota.ntt%40gmail.com
The idea to use a union in the definition of RangeTblEntry is clearly not being pursued. Reviewed-by: Andrew Dunstan <andrew@dunslane.net> Discussion: https://www.postgresql.org/message-id/flat/4b27fc50-8cd6-46f5-ab20-88dbaadca645@eisentraut.org
Clarify that RangeTblEntry.lateral reflects whether LATERAL was specified in the statement (as opposed to whether lateralness is implicit). Also, the list of applicable entry types was incomplete. Reviewed-by: Andrew Dunstan <andrew@dunslane.net> Discussion: https://www.postgresql.org/message-id/flat/4b27fc50-8cd6-46f5-ab20-88dbaadca645@eisentraut.org
Reformat some comments in node field definitions to avoid long lines. This makes room for per-field annotations. Similar to 835d476. Reviewed-by: Andrew Dunstan <andrew@dunslane.net> Discussion: https://www.postgresql.org/message-id/flat/4b27fc50-8cd6-46f5-ab20-88dbaadca645@eisentraut.org
This is part of an effort to reduce the number of special cases in the automatically generated node support functions. This patch removes _jumbleRangeTblEntry() and instead adds per-field query_jumble_ignore annotations to match the behavior of the previous custom code. The pg_stat_statements test suite has some coverage of this. It gets rid of the switch on rtekind; this should be technically correct, since we do the equal and copy functions like this also. The list of fields to jumble has been checked and is considered correct as of 8b29a11. Reviewed-by: Andrew Dunstan <andrew@dunslane.net> Discussion: https://www.postgresql.org/message-id/flat/4b27fc50-8cd6-46f5-ab20-88dbaadca645@eisentraut.org
Put the fields alias and eref earlier in the struct, so that it matches the order in _outRangeTblEntry()/_readRangeTblEntry(). This helps if we ever want to fully automate out/read of RangeTblEntry. Also, it makes dumps in the debugger easier to read in the same way. Internally, this makes no difference. Reviewed-by: Andrew Dunstan <andrew@dunslane.net> Discussion: https://www.postgresql.org/message-id/flat/4b27fc50-8cd6-46f5-ab20-88dbaadca645@eisentraut.org
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Commit 61461a3 introduced new functions to libpq for cancelling queries. This replaces the usage of the old ones in postgres_fdw. This is done by introducing a new libpqsrv_cancel helper function. This function takes a timeout and can itself be interupted while it is sending a cancel request instead of being blocked. This new function is now also used by dblink. Finally, it also adds some test coverage for the cancel support in postgres_fdw. Author: Jelte Fennema-Nio <postgres@jeltef.nl> Discussion: https://postgr.es/m/CAGECzQT_VgOWWENUqvUV9xQmbaCyXjtRRAYO8W07oqashk_N+g@mail.gmail.com
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1. TruncateMultiXact() performs the SLRU truncations in a critical
section. Deleting the SLRU segments calls ForwardSyncRequest(), which
will try to compact the request queue if it's full
(CompactCheckpointerRequestQueue()). That in turn allocates memory,
which is not allowed in a critical section. Backtrace:
TRAP: failed Assert("CritSectionCount == 0 || (context)->allowInCritSection"), File: "../src/backend/utils/mmgr/mcxt.c", Line: 1353, PID: 920981
postgres: autovacuum worker template0(ExceptionalCondition+0x6e)[0x560a501e866e]
postgres: autovacuum worker template0(+0x5dce3d)[0x560a50217e3d]
postgres: autovacuum worker template0(ForwardSyncRequest+0x8e)[0x560a4ffec95e]
postgres: autovacuum worker template0(RegisterSyncRequest+0x2b)[0x560a50091eeb]
postgres: autovacuum worker template0(+0x187b0a)[0x560a4fdc2b0a]
postgres: autovacuum worker template0(SlruDeleteSegment+0x101)[0x560a4fdc2ab1]
postgres: autovacuum worker template0(TruncateMultiXact+0x2fb)[0x560a4fdbde1b]
postgres: autovacuum worker template0(vac_update_datfrozenxid+0x4b3)[0x560a4febd2f3]
postgres: autovacuum worker template0(+0x3adf66)[0x560a4ffe8f66]
postgres: autovacuum worker template0(AutoVacWorkerMain+0x3ed)[0x560a4ffe7c2d]
postgres: autovacuum worker template0(+0x3b1ead)[0x560a4ffecead]
postgres: autovacuum worker template0(+0x3b620e)[0x560a4fff120e]
postgres: autovacuum worker template0(+0x3b3fbb)[0x560a4ffeefbb]
postgres: autovacuum worker template0(+0x2f724e)[0x560a4ff3224e]
/lib/x86_64-linux-gnu/libc.so.6(+0x27c8a)[0x7f62cc642c8a]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x85)[0x7f62cc642d45]
postgres: autovacuum worker template0(_start+0x21)[0x560a4fd16f31]
To fix, bail out in CompactCheckpointerRequestQueue() without doing
anything, if it's called in a critical section. That covers the above
call path, as well as any other similar cases where
RegisterSyncRequest might be called in a critical section.
2. After fixing that, another problem became apparent: Autovacuum
process doing that truncation can deadlock with the checkpointer
process. TruncateMultiXact() sets "MyProc->delayChkptFlags |=
DELAY_CHKPT_START". If the sync request queue is full and cannot be
compacted, the process will repeatedly sleep and retry, until there is
room in the queue. However, if the checkpointer is trying to start a
checkpoint at the same time, and is waiting for the DELAY_CHKPT_START
processes to finish, the queue will never shrink.
More concretely, the autovacuum process is stuck here:
#0 0x00007fc934926dc3 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x000056220b24348b in WaitEventSetWaitBlock (set=0x56220c2e4b50, occurred_events=0x7ffe7856d040, nevents=1, cur_timeout=<optimized out>) at ../src/backend/storage/ipc/latch.c:1570
#2 WaitEventSetWait (set=0x56220c2e4b50, timeout=timeout@entry=10, occurred_events=<optimized out>, occurred_events@entry=0x7ffe7856d040, nevents=nevents@entry=1,
wait_event_info=wait_event_info@entry=150994949) at ../src/backend/storage/ipc/latch.c:1516
#3 0x000056220b243224 in WaitLatch (latch=<optimized out>, latch@entry=0x0, wakeEvents=wakeEvents@entry=40, timeout=timeout@entry=10, wait_event_info=wait_event_info@entry=150994949)
at ../src/backend/storage/ipc/latch.c:538
#4 0x000056220b26cf46 in RegisterSyncRequest (ftag=ftag@entry=0x7ffe7856d0a0, type=type@entry=SYNC_FORGET_REQUEST, retryOnError=true) at ../src/backend/storage/sync/sync.c:614
#5 0x000056220af9db0a in SlruInternalDeleteSegment (ctl=ctl@entry=0x56220b7beb60 <MultiXactMemberCtlData>, segno=segno@entry=11350) at ../src/backend/access/transam/slru.c:1495
#6 0x000056220af9dab1 in SlruDeleteSegment (ctl=ctl@entry=0x56220b7beb60 <MultiXactMemberCtlData>, segno=segno@entry=11350) at ../src/backend/access/transam/slru.c:1566
postgres#7 0x000056220af98e1b in PerformMembersTruncation (oldestOffset=<optimized out>, newOldestOffset=<optimized out>) at ../src/backend/access/transam/multixact.c:3006
postgres#8 TruncateMultiXact (newOldestMulti=newOldestMulti@entry=3221225472, newOldestMultiDB=newOldestMultiDB@entry=4) at ../src/backend/access/transam/multixact.c:3201
postgres#9 0x000056220b098303 in vac_truncate_clog (frozenXID=749, minMulti=<optimized out>, lastSaneFrozenXid=749, lastSaneMinMulti=3221225472) at ../src/backend/commands/vacuum.c:1917
postgres#10 vac_update_datfrozenxid () at ../src/backend/commands/vacuum.c:1760
postgres#11 0x000056220b1c3f76 in do_autovacuum () at ../src/backend/postmaster/autovacuum.c:2550
postgres#12 0x000056220b1c2c3d in AutoVacWorkerMain (startup_data=<optimized out>, startup_data_len=<optimized out>) at ../src/backend/postmaster/autovacuum.c:1569
and the checkpointer is stuck here:
#0 0x00007fc9348ebf93 in clock_nanosleep () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fc9348fe353 in nanosleep () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x000056220b40ecb4 in pg_usleep (microsec=microsec@entry=10000) at ../src/port/pgsleep.c:50
#3 0x000056220afb43c3 in CreateCheckPoint (flags=flags@entry=108) at ../src/backend/access/transam/xlog.c:7098
#4 0x000056220b1c6e86 in CheckpointerMain (startup_data=<optimized out>, startup_data_len=<optimized out>) at ../src/backend/postmaster/checkpointer.c:464
To fix, add AbsorbSyncRequests() to the loops where the checkpointer
waits for DELAY_CHKPT_START or DELAY_CHKPT_COMPLETE operations to
finish.
Backpatch to v14. Before that, SLRU deletion didn't call
RegisterSyncRequest, which avoided this failure. I'm not sure if there
are other similar scenarios on older versions, but we haven't had
any such reports.
Discussion: https://www.postgresql.org/message-id/ccc66933-31c1-4f6a-bf4b-45fef0d4f22e@iki.fi
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It seems that pgindent was not run after the error handling refactor in
commit a9e9a9f. This fixes that and
also addresses a few other things pgindent wanted to change in libpq.It seems that pgindent was not run after the error handling refactor in
commit a9e9a9f. This fixes that and
also addresses a few other things pgindent wanted to change in libpq.