These options already exist, but you need to specify a column list for
them, which can be cumbersome. We already have the possibility of all
columns for FORCE QUOTE, so this is simply extending that facility to
FORCE_NULL and FORCE_NOT_NULL.
Author: Zhang Mingli
Reviewed-By: Richard Guo, Kyatoro Horiguchi, Michael Paquier.
Discussion: https://postgr.es/m/CACJufxEnVqzOFtqhexF2+AwOKFrV8zHOY3y=p+gPK6eB14pn_w@mail.gmail.com
ANALYZE on a table with inheritance children analyzes all the child
tables in a loop. When stepping to next child table, it updated the
child rel ID value in the command progress stats, but did not reset
the 'sample_blks_total' and 'sample_blks_scanned' counters.
acquire_sample_rows() updates 'sample_blks_total' as soon as the scan
starts and 'sample_blks_scanned' after processing the first block, but
until then, pg_stat_progress_analyze would display a bogus combination
of the new child table relid with old counter values from the
previously processed child table. Fix by resetting 'sample_blks_total'
and 'sample_blks_scanned' to zero at the same time that
'current_child_table_relid' is updated.
Backpatch to v13, where pg_stat_progress_analyze view was introduced.
Reported-by: Justin Pryzby
Discussion: https://www.postgresql.org/message-id/20230122162345.GP13860%40telsasoft.com
Under some circumstances, concurrent MERGE operations could lead to
inconsistent results, that varied according the plan chosen. This was
caused by a lack of rowmarks on the source relation, which meant that
EvalPlanQual rechecking was not guaranteed to return the same source
tuples when re-running the join query.
Fix by ensuring that preprocess_rowmarks() sets up PlanRowMarks for
all non-target relations used in MERGE, in the same way that it does
for UPDATE and DELETE.
Per bug #18103. Back-patch to v15, where MERGE was introduced.
Dean Rasheed, reviewed by Richard Guo.
Discussion: https://postgr.es/m/18103-c4386baab8e355e3%40postgresql.org
Add "-gmt 1" to our test invocations of the Tcl "clock" command,
so that they do not consult the timezone environment. While it
doesn't really matter which timezone is used here, it does
matter that the command not fall over entirely. We've now
discovered that at least on FreeBSD, "clock scan" will fail if
/etc/localtime is missing. It seems worth making the test
insensitive to that.
Per Tomas Vondras' buildfarm animal dikkop. Thanks to
Thomas Munro for the diagnosis.
Discussion: https://postgr.es/m/316d304a-1dcd-cea1-3d6c-27f794727a06@enterprisedb.com
As of Xcode 15 (macOS Sonoma), the linker complains about duplicate
references to the same library. We see warnings about libpgport and
libpgcommon being duplicated in many client executables. This is a
consequence of the hack introduced in commit 6b7ef076b to list
libpgport before libpq while not removing it from $(LIBS).
(Commit 8396447cd later applied the same rule to libpgcommon.)
The concern in 6b7ef076b was to ensure that the client executable
wouldn't unintentionally depend on pgport functions from libpq.
That concern is obsolete on any platform for which we can do symbol
export control, because if we can then the pgport functions in libpq
won't be exposed anyway. Hence, we can fix this problem by just
removing libpgport and libpgcommon from $(libpq_pgport), and letting
clients depend on the occurrences in $(LIBS).
In the back branches, do that only on macOS (which we know has
symbol export control). In HEAD, let's be more aggressive and
remove the extra libraries everywhere. The only still-supported
platforms that lack export control are MinGW/Cygwin, and it
doesn't seem worth sweating over ABI stability details for those
(or if somebody does care, it'd probably be possible to perform
symbol export control for those too). As well as being simpler,
this might give some microscopic improvement in build time.
The meson build system is not changed here, as it doesn't have
this particular disease, though it does have some related issues
that we'll fix separately.
Discussion: https://postgr.es/m/467042.1695766998@sss.pgh.pa.us
Commit 7d3b7011b added a link to the statistics functions, which at the
time were anchored under the section for statistics views. aebe989477
added a separate section for statistics functions, but the link was not
updated to point to the new anchor. Fix by changing the xref.
Backpatch to all supported branches.
Author: Peter Smith <peter.b.smith@fujitsu.com>
Discussion: https://postgr.es/m/CAHut+Ptr0jKzNNtWnssLq+3jNhbyaBseqf6NPrWHk08mQFRoTg@mail.gmail.com
Backpatch-through: 11
Improve find_base_rel() and find_base_rel_ignore_join() so that they
raise an ERROR if they ever receive a negative relid value in
non-cassert builds. If either of these functions had ever received a
negative relid then they'd have attempted to access memory that does not
belong to simple_rel_array.
Because no evidence has been presented of actual cases where bugs have
caused this to happen, here we take a lightweight approach to checking
for negative values and simply cast both values to uint32 before
performing the comparison. This will cause any negative relids to be
seen as greater than simple_rel_array_size which will ERROR rather than
attempt to access a negative simple_rel_array element. Obviously, the
run-time error is better than a crash, so it makes sense to protect
against this, especially when it can be done without adding any
additional run-time overhead.
There is a slight change here if the functions are ever called with a
relid of 0. This will pass the bounds check, but that array entry
should be NULL (along with the corresponding simple_rte_array entry), so
won't pass the "if (rel)" condition and still fall through and raise an
ERROR.
Author: Ranier Vilela
Reviewed-by: Ashutosh Bapat, David Rowley
Discussion: https://postgr.es/m/CAEudQArQSghBu2gLojg4o_tnHj_x2HcS%3D%2BwewL3NJS8z0VnK%2Bg%40mail.gmail.com
nbtree's mark/restore processing failed to correctly handle an edge case
involving array key advancement and related search-type scan key state.
Scans with ScalarArrayScalarArrayOpExpr quals requiring mark/restore
processing (for a merge join) could incorrectly conclude that an
affected array/scan key must not have advanced during the time between
marking and restoring the scan's position.
As a result of all this, array key handling within btrestrpos could skip
a required call to _bt_preprocess_keys(). This confusion allowed later
primitive index scans to overlook tuples matching the true current array
keys. The scan's search-type scan keys would still have spurious values
corresponding to the final array element(s) -- not values matching the
first/now-current array element(s).
To fix, remember that "array key wraparound" has taken place during the
ongoing btrescan in a flag variable stored in the scan's state, and use
that information at the point where btrestrpos decides if another call
to _bt_preprocess_keys is required.
Oversight in commit 70bc5833, which taught nbtree to handle array keys
during mark/restore processing, but missed this subtlety. That commit
was itself a bug fix for an issue in commit 9e8da0f7, which taught
nbtree to handle ScalarArrayOpExpr quals natively.
Author: Peter Geoghegan <pg@bowt.ie>
Discussion: https://postgr.es/m/CAH2-WzkgP3DDRJxw6DgjCxo-cu-DKrvjEv_ArkP2ctBJatDCYg@mail.gmail.com
Backpatch: 11- (all supported branches).
This code was sloppy about comparison of index columns that
are expressions. It didn't reliably reject cases where one
index has an expression where the other has a plain column,
and it could index off the start of the attmap array, leading
to a Valgrind complaint (though an actual crash seems unlikely).
I'm not sure that the expression-vs-column sloppiness leads
to any visible problem in practice, because the subsequent
comparison of the two expression lists would reject cases
where the indexes have different numbers of expressions
overall. Maybe we could falsely match indexes having the
same expressions in different column positions, but it'd
require unlucky contents of the word before the attmap array.
It's not too surprising that no problem has been reported
from the field. Nonetheless, this code is clearly wrong.
Per bug #18135 from Alexander Lakhin. Back-patch to all
supported branches.
Discussion: https://postgr.es/m/18135-532f4a755e71e4d2@postgresql.org
Previously, one of the values in the struct was returned as the return
value, and another was returned via an output parameter. In
preparation for returning more stuff, consolidate both values into a
struct returned via an output parameter.
Melanie Plageman, reviewed by Andres Freund and by me.
Discussion: https://postgr.es/m/CAAKRu_br124qsGJieuYA0nGjywEukhK1dKBfRdby_4yY3E9SXA%40mail.gmail.com
For a reader unfamiliar with the postgres code it might take some
grepping to find where elevels are defined. This adds a reference
to elog.h in the text like how SQLSTATE errorcodes are referenced
to errcodes.h on the same page.
Author: Kuwamura Masaki <kuwamura@db.is.i.nagoya-u.ac.jp>
Discussion: https://postgr.es/m/CAMyC8qqp1UDA9zothnJ9CbUYByytwpALS3LkdZ6bs1w5kZw5Xg@mail.gmail.com
Tid Range scans were added back in bb437f995. That commit forgot to add
handling for TidRangePaths in print_path().
Only people building with OPTIMIZER_DEBUG might have noticed this, which
likely is the reason it's taken 4 years for anyone to notice.
Author: Andrey Lepikhov
Reported-by: Andrey Lepikhov
Discussion: https://postgr.es/m/379082d6-1b6a-4cd6-9ecf-7157d8c08635@postgrespro.ru
Backpatch-through: 14, where bb437f995 was introduced
The comment claimed that pg_resetwal updates the pg_control file if it
is of an old version. This has apparently never been true. Also, in
c3c09be34b, another comment was added elsewhere that this currently
does not happen. So this comment is wrong and redundant and can be
removed.
Reviewed-by: Aleksander Alekseev <aleksander@timescale.com>
Discussion: https://www.postgresql.org/message-id/flat/0f3ab4a1-ae80-56e8-3426-6b4a02507687@eisentraut.org
This commit changes the query jumbling of CallStmt so as its IN/OUT
parameters are able to show up as constants with a parameter symbol in
pg_stat_statements, like:
CALL proc1($1, $2);
CALL proc2($1, $2, $3);
The transformed FuncExpr is used in the query ID computation instead of
the FuncCall generated by the parser, so as it is sensitive to the OID
of the procedure and its list of input arguments. The output arguments
are handled in a separate list in CallStmt, which is also included in
the computation.
Tests are added to pg_stat_statements to show how this affects CALL with
IN/OUT parameters as well as overloaded functions.
Like 638d42a3c5 or 31de7e60da, this improves the monitoring of
workloads with a lot of CALL statements, preventing unnecessary bloat
when these use different input (or event output) values.
Author: Sami Imseih
Discussion: https://postgr.es/m/B44FA29D-EBD0-4DD9-ABC2-16F1CB087074@amazon.com
This commit removes unnecessary ExecExprFreeContext() calls in
ExecEnd* routines because the actual cleanup is managed by
FreeExecutorState(). With no callers remaining for
ExecExprFreeContext(), this commit also removes the function.
This commit also drops redundant ExecClearTuple() calls, because
ExecResetTupleTable() in ExecEndPlan() already takes care of
resetting and dropping all TupleTableSlots initialized with
ExecInitScanTupleSlot() and ExecInitExtraTupleSlot().
After these modifications, the ExecEnd*() routines for ValuesScan,
NamedTuplestoreScan, and WorkTableScan became redundant. So, this
commit removes them.
Reviewed-by: Robert Haas
Discussion: https://postgr.es/m/CA+HiwqFGkMSge6TgC9KQzde0ohpAycLQuV7ooitEEpbKB0O_mg@mail.gmail.com
"in_streaming" is a flag used to track if an instance of pgoutput is
streaming changes. When pgoutput is started, the flag was always reset,
switched it back and forth in the stream start/stop callbacks.
Before this commit, it was a global variable, which is confusing as it
is actually attached to a state of PGOutputData. Per my analysis, using
a global variable did not lead to an active bug like in 54ccfd6586,
but it makes the code more consistent. Note that we cannot backpatch
this change anyway as it requires the addition of a new field to
PGOutputData, exposed in pgoutput.h.
Author: Hou Zhijie
Reviewed-by: Amit Kapila, Michael Paquier, Peter Smith
Discussion: https://postgr.es/m/OS0PR01MB571690EF24F51F51EFFCBB0E94FAA@OS0PR01MB5716.jpnprd01.prod.outlook.com
This unifies some repetitive code.
Note: I didn't push the "not found" error message into the new
function, even though all existing callers would be able to make use
of it. Using the existing error handling as-is would probably require
exposing the Relation type via tupdesc.h, which doesn't seem
desirable. (Or even if we changed it to just report the OID, it would
inject the concept of a relation containing the tuple descriptor into
tupdesc.h, which might be a layering violation. Perhaps some further
improvements could be considered here separately.)
Discussion: https://www.postgresql.org/message-id/flat/52a125e4-ff9a-95f5-9f61-b87cf447e4da%40eisentraut.org
When performing inlining LLVM unfortunately "leaks" types (the
types survive and are usable, but a new round of inlining will
recreate new structurally equivalent types). This accumulation
will over time amount to a memory leak which for some queries
can be large enough to trigger the OOM process killer.
To avoid accumulation of types, all IR related data is stored
in an LLVMContextRef which is dropped and recreated in order
to release all types. Dropping and recreating incurs overhead,
so it will be done only after 100 queries. This is a heuristic
which might be revisited, but until we can get the size of the
context from LLVM we are flying a bit blind.
This issue has been reported several times, there may be more
references to it in the archives on top of the threads linked
below.
Backpatching of this fix will be handled once it has matured
in master for a bit.
Reported-By: Justin Pryzby <pryzby@telsasoft.com>
Reported-By: Kurt Roeckx <kurt@roeckx.be>
Reported-By: Jaime Casanova <jcasanov@systemguards.com.ec>
Reported-By: Lauri Laanmets <pcspets@gmail.com>
Author: Andres Freund and Daniel Gustafsson
Discussion: https://postgr.es/m/7acc8678-df5f-4923-9cf6-e843131ae89d@www.fastmail.com
Discussion: https://postgr.es/m/20201218235607.GC30237@telsasoft.com
Discussion: https://postgr.es/m/CAPH-tTxLf44s3CvUUtQpkDr1D8Hxqc2NGDzGXS1ODsfiJ6WSqA@mail.gmail.com
Commit b059d2f456 introduced llvm_types_module and accidentally
exported it. As there is no usecase for accessing this variable
externally, this makes it static.
Author: Andres Freund <andres@anarazel.de>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/20221101055132.pjjsvlkeo4stbjkq@awork3.anarazel.de
The pgoutput module uses a global variable (publish_no_origin) to cache
the action for the origin filter, but we didn't reset the flag when
shutting down the output plugin, so subsequent retries may access the
previous publish_no_origin value.
We fix this by storing the flag in the output plugin's private data.
Additionally, the patch removes the currently unused origin string from the
structure.
For the back branch, to avoid changing the exposed structure, we eliminated the
global variable and instead directly used the origin string for change
filtering.
Author: Hou Zhijie
Reviewed-by: Amit Kapila, Michael Paquier
Backpatch-through: 16
Discussion: http://postgr.es/m/OS0PR01MB571690EF24F51F51EFFCBB0E94FAA@OS0PR01MB5716.jpnprd01.prod.outlook.com
As coded, the module's Makefile would fail to set a value for PYTHON as
it checked if the variable is defined. When compiling without
--with-python, PYTHON is defined and set to an empty value, so the
existing check is not able to do its work.
This commit switches the rule to check if the value is empty rather than
defined, allowing the generation of unaccent.rules even if --with-python
is not used as long as "python" exists. BISON and FLEX do the same in
pgxs.mk, for instance.
Thinko in f85a485f89.
Author: Japin Li
Discussion: https://postgr.es/m/MEYP282MB1669F86C0DC7B4DC48489CB0B6C3A@MEYP282MB1669.AUSP282.PROD.OUTLOOK.COM
Backpatch-through: 13
We started to use this linker switch in commit 9df308697 of
2004-07-13, which was in the OS X 10.3 era. Apparently it's been a
no-op since around OS X 10.9. Apple's most recent toolchain version
actively complains about it, so it's time to get rid of it.
Discussion: https://postgr.es/m/467042.1695766998@sss.pgh.pa.us
Yet another bug in the ilk of commits a7ee7c851 and 741b88435. In
741b88435, we took care to clear the memorized location of the
downlink when we split the parent page, because splitting the parent
page can move the downlink. But we missed that even *updating* a tuple
on the parent can move it, because updating a tuple on a gist page is
implemented as a delete+insert, so the updated tuple gets moved to the
end of the page.
This commit fixes the bug in two different ways (belt and suspenders):
1. Clear the downlink when we update a tuple on the parent page, even
if it's not split. This the same approach as in commits a7ee7c851
and 741b88435.
I also noticed that gistFindCorrectParent did not clear the
'downlinkoffnum' when it stepped to the right sibling. Fix that
too, as it seems like a clear bug even though I haven't been able
to find a test case to hit that.
2. Change gistFindCorrectParent so that it treats 'downlinkoffnum'
merely as a hint. It now always first checks if the downlink is
still at that location, and if not, it scans the page like before.
That's more robust if there are still more cases where we fail to
clear 'downlinkoffnum' that we haven't yet uncovered. With this,
it's no longer necessary to meticulously clear 'downlinkoffnum',
so this makes the previous fixes unnecessary, but I didn't revert
them because it still seems nice to clear it when we know that the
downlink has moved.
Also add the test case using the same test data that Alexander
posted. I tried to reduce it to a smaller test, and I also tried to
reproduce this with different test data, but I was not able to, so
let's just include what we have.
Backpatch to v12, like the previous fixes.
Reported-by: Alexander Lakhin
Discussion: https://www.postgresql.org/message-id/18129-caca016eaf0c3702@postgresql.org
There was a mismatch between the const qualifiers for
excludeDirContents in src/backend/backup/basebackup.c and
src/bin/pg_rewind/filemap.c, which led to a quick search for similar
cases. We should make excludeDirContents match, but the rest of the
changes seem like a good idea as well.
Author: David Steele <david@pgmasters.net>
Discussion: https://www.postgresql.org/message-id/flat/669a035c-d23d-2f38-7ff0-0cb93e01d610@pgmasters.net
As implemented in 5891c7a8ed, setting "force" to true in
pgstat_report_wal() causes the routine to not wait for the pgstat
shmem lock if it cannot be acquired, in which case the WAL and I/O
statistics finish by not being flushed. The origin of the confusion
comes from pgstat_flush_wal() and pgstat_flush_io(), that use "nowait"
as sole argument. The I/O stats are new in v16.
This is the opposite behavior of what has been used in
pgstat_report_stat(), where "force" is the opposite of "nowait". In
this case, when "force" is true, the routine sets "nowait" to false,
which would cause the routine to wait for the pgstat shmem lock,
ensuring that the stats are always flushed. When "force" is false,
"nowait" is set to true, and the stats would only not be flushed if the
pgstat shmem lock can be acquired, returning immediately without
flushing the stats if the lock cannot be acquired.
This commit changes pgstat_report_wal() so as "force" has the same
behavior as in pgstat_report_stat(). There are currently three callers
of pgstat_report_wal():
- Two in the checkpointer where force=true during a shutdown and the
main checkpointer loop. Now the code behaves so as the stats are always
flushed.
- One in the main loop of the bgwriter, where force=false. Now the code
behaves so as the stats would not be flushed if the pgstat shmem lock
could not be acquired.
Before this commit, some stats on WAL and I/O could have been lost after
a shutdown, for example.
Reported-by: Ryoga Yoshida
Author: Ryoga Yoshida, Michael Paquier
Discussion: https://postgr.es/m/f87a4d7be70530606b864fd1df91718c@oss.nttdata.com
Backpatch-through: 15
bae868ca removed a check that was still needed. If you had an
xl_tot_len at the end of a page that was too small for a record header,
but not big enough to span onto the next page, we'd immediately perform
the CRC check using a bogus large length. Because of arbitrary coding
differences between the CRC implementations on different platforms,
nothing very bad happened on common modern systems. On systems using
the _sb8.c fallback we could segfault.
Restore that check, add a new assertion and supply a test for that case.
Back-patch to 12, like bae868ca.
Tested-by: Tom Lane <tgl@sss.pgh.pa.us>
Tested-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/CA%2BhUKGLCkTT7zYjzOxuLGahBdQ%3DMcF%3Dz5ZvrjSOnW4EDhVjT-g%40mail.gmail.com
Andrew Dunstan