Commit Graph

48732 Commits

Author SHA1 Message Date
Bruce Momjian 22023dd560 doc: mention inheritance's tableoid can be used in partitioning
Previously tableoid was not mentioned in the partition doc section.  We
only had a link to the "all the normal rules" of inheritance section.

Reported-by: michal.palenik@freemap.sk

Discussion: https://postgr.es/m/162627031219.693.11508199541771263335@wrigleys.postgresql.org

Backpatch-through: 10
2021-08-03 11:11:51 -04:00
Bruce Momjian 2c4fdfef50 doc: add example of using pg_dump with GNU split and gzip
This is only possible with GNU split, not other versions like BSD split.

Reported-by: jim@jdoherty.net

Discussion: https://postgr.es/m/162653459215.701.6323855956817776386@wrigleys.postgresql.org

Backpatch-through: 9.6
2021-08-03 10:57:32 -04:00
Tom Lane f260436459 Use elog, not Assert, to report failure to provide an outer snapshot.
As of commit 84f5c2908, executing SQL commands (via SPI or otherwise)
requires having either an active Portal, or a caller-established
active snapshot.  We were simply Assert'ing that that's the case.
But we've now had a couple different reports of people testing
extensions that didn't meet this requirement, and were confused by
the resulting crash.  Let's convert the Assert to a test-and-elog,
in hopes of making the issue clearer for extension authors.

Per gripes from Liu Huailing and RekGRpth.  Back-patch to v11,
like the prior commit.

Discussion: https://postgr.es/m/OSZPR01MB6215671E3C5956A034A080DFBEEC9@OSZPR01MB6215.jpnprd01.prod.outlook.com
Discussion: https://postgr.es/m/17035-14607d308ac8643c@postgresql.org
2021-07-31 11:50:14 -04:00
Dean Rasheed 5c62920fa9 Fix corner-case errors and loss of precision in numeric_power().
This fixes a couple of related problems that arise when raising
numbers to very large powers.

Firstly, when raising a negative number to a very large integer power,
the result should be well-defined, but the previous code would only
cope if the exponent was small enough to go through power_var_int().
Otherwise it would throw an internal error, attempting to take the
logarithm of a negative number. Fix this by adding suitable handling
to the general case in power_var() to cope with negative bases,
checking for integer powers there.

Next, when raising a (positive or negative) number whose absolute
value is slightly less than 1 to a very large power, the result should
approach zero as the power is increased. However, in some cases, for
sufficiently large powers, this would lose all precision and return 1
instead of 0. This was due to the way that the local_rscale was being
calculated for the final full-precision calculation:

  local_rscale = rscale + (int) val - ln_dweight + 8

The first two terms on the right hand side are meant to give the
number of significant digits required in the result ("val" being the
estimated result weight). However, this failed to account for the fact
that rscale is clipped to a maximum of NUMERIC_MAX_DISPLAY_SCALE
(1000), and the result weight might be less then -1000, causing their
sum to be negative, leading to a loss of precision. Fix this by
forcing the number of significant digits calculated to be nonnegative.
It's OK for it to be zero (when the result weight is less than -1000),
since the local_rscale value then includes a few extra digits to
ensure an accurate result.

Finally, add additional underflow checks to exp_var() and power_var(),
so that they consistently return zero for cases like this where the
result is indistinguishable from zero. Some paths through this code
already returned zero in such cases, but others were throwing overflow
errors.

Dean Rasheed, reviewed by Yugo Nagata.

Discussion: http://postgr.es/m/CAEZATCW6Dvq7+3wN3tt5jLj-FyOcUgT5xNoOqce5=6Su0bCR0w@mail.gmail.com
2021-07-31 11:27:02 +01:00
John Naylor d9589eb62a Fix range check in ECPG numeric to int conversion
The previous coding guarded against -INT_MAX instead of INT_MIN,
leading to -2147483648 being rejected as out of range.

Per bug #17128 from Kevin Sweet

Discussion: https://www.postgresql.org/message-id/flat/17128-55a8a879727a3e3a%40postgresql.org
Reviewed-by: Tom Lane
Backpatch to all supported branches
2021-07-30 15:59:10 -04:00
Fujii Masao d7ded08e6e Update minimum recovery point on truncation during WAL replay of abort record.
If a file is truncated, we must update minRecoveryPoint. Once a file is
truncated, there's no going back; it would not be safe to stop recovery
at a point earlier than that anymore.

Commit 7bffc9b7bf changed xact_redo_commit() so that it updates
minRecoveryPoint on truncation, but forgot to change xact_redo_abort().

Back-patch to all supported versions.

Reported-by: mengjuan.cmj@alibaba-inc.com
Author: Fujii Masao
Reviewed-by: Heikki Linnakangas
Discussion: https://postgr.es/m/b029fce3-4fac-4265-968e-16f36ff4d075.mengjuan.cmj@alibaba-inc.com
2021-07-29 01:35:00 +09:00
David Rowley c590904d50 Doc: Clarify lock levels taken during ATTACH PARTITION
It wasn't all that clear which lock levels, if any, would be held on the
DEFAULT partition during an ATTACH PARTITION operation.

Also, clarify which locks will be taken if the DEFAULT partition or the
table being attached are themselves partitioned tables.

Here I'm only backpatching to v12 as before then we obtained an ACCESS
EXCLUSIVE lock on the partitioned table.  It seems much less relevant to
mention which locks are taken on other tables when the partitioned table
itself is locked with an ACCESS EXCLUSIVE lock.

Author: Matthias van de Meent, David Rowley
Discussion: https://postgr.es/m/CAEze2WiTB6iwrV8W_J=fnrnZ7fowW3qu-8iQ8zCHP3FiQ6+o-A@mail.gmail.com
Backpatch-through: 12
2021-07-28 15:01:10 +12:00
Alvaro Herrera 6feb229f53
Set pg_setting.pending_restart when pertinent config lines are removed
This changes the behavior of examining the pg_file_settings view after
changing a config option that requires restart.  The user needs to know
that any change of such options does not take effect until a restart,
and this worked correctly if the line is edited without removing it.
However, for the case where the line is removed altogether, the flag
doesn't get set, because a flag was only set in set_config_option, but
that's not called for lines removed.  Repair.

(Ref.: commits 62d16c7fc5 and a486e35706)

Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/202107262302.xsfdfc5sb7sh@alvherre.pgsql
2021-07-27 15:44:12 -04:00
Fujii Masao de87c481f6 Avoid using ambiguous word "non-negative" in error messages.
The error messages using the word "non-negative" are confusing
because it's ambiguous about whether it accepts zero or not.
This commit improves those error messages by replacing it with
less ambiguous word like "greater than zero" or
"greater than or equal to zero".

Also this commit added the note about the word "non-negative" to
the error message style guide, to help writing the new error messages.

When postgres_fdw option fetch_size was set to zero, previously
the error message "fetch_size requires a non-negative integer value"
was reported. This error message was outright buggy. Therefore
back-patch to all supported versions where such buggy error message
could be thrown.

Reported-by: Hou Zhijie
Author: Bharath Rupireddy
Reviewed-by: Kyotaro Horiguchi, Fujii Masao
Discussion: https://postgr.es/m/OS0PR01MB5716415335A06B489F1B3A8194569@OS0PR01MB5716.jpnprd01.prod.outlook.com
2021-07-28 01:24:24 +09:00
Bruce Momjian 7626e9f2be pg_resetxlog: add option to set oldest xid & use by pg_upgrade
Add pg_resetxlog -u option to set the oldest xid in pg_control.
Previously -x set this value be -2 billion less than the -x value.
However, this causes the server to immediately scan all relation's
relfrozenxid so it can advance pg_control's oldest xid to be inside the
autovacuum_freeze_max_age range, which is inefficient and might disrupt
diagnostic recovery.  pg_upgrade will use this option to better create
the new cluster to match the old cluster.

Reported-by: Jason Harvey, Floris Van Nee

Discussion: https://postgr.es/m/20190615183759.GB239428@rfd.leadboat.com, 87da83168c644fd9aae38f546cc70295@opammb0562.comp.optiver.com

Author: Bertrand Drouvot

Backpatch-through: 9.6
2021-07-26 22:38:14 -04:00
Michael Paquier c4ef3b81b8 Fix a couple of memory leaks in src/bin/pg_basebackup/
These have been introduced by 7fbe0c8, and could happen for
pg_basebackup and pg_receivewal.

Per report from Coverity for the ones in walmethods.c, I have spotted
the ones in receivelog.c after more review.

Backpatch-through: 10
2021-07-26 11:14:14 +09:00
Fujii Masao 1bcfda30fb Make the standby server promptly handle interrupt signals.
This commit changes the startup process in the standby server so that
it handles the interrupt signals after waiting for wal_retrieve_retry_interval
on the latch and resetting it, before entering another wait on the latch.
This change causes the standby server to promptly handle interrupt signals.

Otherwise, previously, there was the case where the standby needs to
wait extra five seconds to shutdown when the shutdown request arrived
while the startup process was waiting for wal_retrieve_retry_interval
on the latch.

Author: Fujii Masao, but implementation idea is from Soumyadeep Chakraborty
Reviewed-by: Soumyadeep Chakraborty
Discussion: https://postgr.es/m/9d7e6ab0-8a53-ddb9-63cd-289bcb25fe0e@oss.nttdata.com

Per discussion of BUG #17073, back-patch to all supported versions.
Discussion: https://postgr.es/m/17073-1a5fdaed0fa5d4d0@postgresql.org
2021-07-25 11:16:02 +09:00
Tom Lane 899785b4f6 Fix check for conflicting session- vs transaction-level locks.
We have an implementation restriction that PREPARE TRANSACTION can't
handle cases where both session-lifespan and transaction-lifespan locks
are held on the same lockable object.  (That's because we'd otherwise
need to acquire a new PROCLOCK entry during post-prepare cleanup, which
is an operation that might fail.  The situation can only arise with odd
usages of advisory locks, so removing the restriction is probably not
worth the amount of effort it would take.)  AtPrepare_Locks attempted
to enforce this, but its logic was many bricks shy of a load, because
it only detected cases where the session and transaction locks had the
same lockmode.  Locks of different modes on the same object would lead
to the rather unhelpful message "PANIC: we seem to have dropped a bit
somewhere".

To fix, build a transient hashtable with one entry per locktag,
not one per locktag + mode, and use that to detect conflicts.

Per bug #17122 from Alexander Pyhalov.  This bug is ancient,
so back-patch to all supported branches.

Discussion: https://postgr.es/m/17122-04f3c32098a62233@postgresql.org
2021-07-24 18:35:52 -04:00
Tom Lane 4c8a14e8d9 Make printf("%s", NULL) print "(null)" instead of crashing.
We previously took a hard-line attitude that callers should never print
a null string pointer, and doing so is worthy of an assertion failure
or crash.  However, we've long since flushed out any easy-to-find bugs
of that nature.  What remains is a lot of code that perhaps could fail
that way in hard-to-reach corner cases.  For example, in something as
simple as
    ereport(ERROR,
            (errcode(ERRCODE_UNDEFINED_OBJECT),
             errmsg("constraint \"%s\" for table \"%s\" does not exist",
                    conname, get_rel_name(relid))));
one must wonder whether it's completely guaranteed that get_rel_name
cannot return NULL in this context.  If such a situation did occur,
the existing policy converts what might be a pretty minor bug into
a server crash condition.  This is not good for robustness.

Hence, let's follow the lead of glibc and print "(null)" instead
of failing.  We should, of course, still consider it a bug if that
behavior is reachable in ordinary use; but crashing seems less
desirable than not crashing.

This fix works across-the-board in v12 and up, where we always use
src/port/snprintf.c.  Before that, on most platforms we're at the mercy
of the local libc, but it appears that Solaris 10 is the only supported
platform where we'd still get a crash.  Most other platforms such as
*BSD, macOS, and Solaris 11 have adopted glibc's behavior at some
point.  (AIX and HPUX just print "" not "(null)", but that's close
enough.)  I've not checked what Windows' native printf would do, but
it doesn't matter because we've long used snprintf.c on that platform.

In v12 and up, also const-ify related code so that we're not casting
away const on the constant string.  This is just neatnik-ism, since
next to no compilers will warn about that.

Discussion: https://postgr.es/m/17098-b960f3616c861f83@postgresql.org
2021-07-24 13:41:17 -04:00
Thomas Munro b2f759e35f jit: Don't inline functions that access thread-locals.
Code inlined by LLVM can crash or fail with "Relocation type not
implemented yet!" if it tries to access thread local variables.  Don't
inline such code.

Back-patch to 11, where LLVM arrived.  Bug #16696.

Author: Dmitry Marakasov <amdmi3@amdmi3.ru>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/16696-29d944a33801fbfe@postgresql.org
2021-07-22 15:07:29 +12:00
John Naylor 4b39d5c69a Document "B" and "us" as accepted units in postgres.conf.sample
In postgresql.conf, memory and file size GUCs can be specified with "B"
(bytes) as of b06d8e58b. Likewise, time GUCs can be specified with "us"
(microseconds) as of caf626b2c. Update postgres.conf.sample to reflect
that fact.

Pavel Luzanov

Backpatch to v12, which is the earliest version that allows both of
these units. A separate commit will document the "B" case for v11.

Discussion: https://www.postgresql.org/message-id/flat/f10d16fc-8fa0-1b3c-7371-cb3a35a13b7a%40postgrespro.ru
2021-07-21 10:19:00 -04:00
Fujii Masao fe4941fdfc doc: Document that only superusers can use pg_import_system_collations().
Back-patch to v10 where pg_import_system_collations() was added.

Author: Atsushi Torikoshi
Reviewed-by: Fujii Masao
Discussion: https://postgr.es/m/b7f484692a3e283710032e68b7f40617@oss.nttdata.com
2021-07-21 13:54:35 +09:00
Tom Lane 85189f54a1 Fix corner-case uninitialized-variable issues in plpgsql.
If an error was raised during our initial attempt to check whether
a successfully-compiled expression is "simple", subsequent calls of
exec_stmt_execsql would suppose that stmt->mod_stmt was already computed
when it had not been.  This could lead to assertion failures in debug
builds; in production builds the effect would typically be to act as
if INTO STRICT had been specified even when it had not been.  Of course
that only matters if the subsequent attempt to execute the expression
succeeds, so that the problem can only be reached by fixing a failure
in some referenced, inline-able SQL function and then retrying the
calling plpgsql function in the same session.

(There might be even-more-obscure ways to change the expression's
behavior without changing the plpgsql function, but that one seems
like the only one people would be likely to hit in practice.)

The most foolproof way to fix this would be to arrange for
exec_prepare_plan to not set expr->plan until we've finished the
subsidiary simple-expression check.  But it seems hard to do that
without creating reference-count leak issues.  So settle for documenting
the hazard in a comment and fixing exec_stmt_execsql to test separately
for whether it's computed stmt->mod_stmt.  (That adds a test-and-branch
per execution, but hopefully that's negligible in context.)  In v11 and
up, also fix exec_stmt_call which had a variant of the same issue.

Per bug #17113 from Alexander Lakhin.  Back-patch to all
supported branches.

Discussion: https://postgr.es/m/17113-077605ce00e0e7ec@postgresql.org
2021-07-20 13:01:48 -04:00
Michael Paquier b9a0de15eb Fix some issues with WAL segment opening for pg_receivewal --compress
The logic handling the opening of new WAL segments was fuzzy when using
--compress if a partial, non-compressed, segment with the same base name
existed in the repository storing those files.  In this case, using
--compress would cause the code to first check for the existence and the
size of a non-compressed segment, followed by the opening of a new
compressed, partial, segment.  The code was accidentally working
correctly on most platforms as the buildfarm has proved, except
bowerbird where gzflush() could fail in this code path.  It is wrong
anyway to take the code path used pre-padding when creating a new
partial, non-compressed, segment, so let's fix it.

Note that this issue exists when users mix successive runs of
pg_receivewal with or without compression, as discovered with the tests
introduced by ffc9dda.

While on it, this refactors the code so as code paths that need to know
about the ".gz" suffix are down from four to one in walmethods.c, easing
a bit the introduction of new compression methods.  This addresses a
second issue where log messages generated for an unexpected failure
would not show the compressed segment name involved, which was
confusing, printing instead the name of the non-compressed equivalent.

Reported-by: Georgios Kokolatos
Discussion: https://postgr.es/m/YPDLz2x3o1aX2wRh@paquier.xyz
Backpatch-through: 10
2021-07-20 12:12:54 +09:00
Amit Kapila f2f459f182 Don't allow to set replication slot_name as ''.
We don't allow to create replication slot_name as an empty string ('') via
SQL API pg_create_logical_replication_slot() but it is allowed to be set
via Alter Subscription command. This will lead to apply worker repeatedly
keep trying to stream data via slot_name '' and the user is not allowed to
create the slot with that name.

Author: Japin Li
Reviewed-By: Ranier Vilela, Amit Kapila
Backpatch-through: 10, where it was introduced
Discussion: https://postgr.es/m/MEYP282MB1669CBD98E721C77CA696499B61A9@MEYP282MB1669.AUSP282.PROD.OUTLOOK.COM
2021-07-19 11:15:03 +05:30
Michael Paquier df12b625a6 doc: Mention CASCADE/RESTRICT for DROP STATISTICS
This grammar has no effect as there are no dependencies on statistics,
but it is supported by the parser.  This is more consistent with the
other DROP commands.

Author: Vignesh C
Discussion: https://postgr.es/m/CALDaNm1LA=yNmzcSfy+0oe6CEAgsxXRf_-UutE3ZncFi8QkFNQ@mail.gmail.com
Backpatch-through: 10
2021-07-19 12:39:57 +09:00
Tom Lane bb9beade25 Doc: document the current-transaction-modes GUCs.
We had documentation of default_transaction_isolation et al,
but for some reason not of transaction_isolation et al.
AFAICS this is just an ancient oversight, so repair.

Per bug #17077 from Yanliang Lei.

Discussion: https://postgr.es/m/17077-ade8e166a01e1374@postgresql.org
2021-07-17 11:52:54 -04:00
Alvaro Herrera 5992c94dc7
Fix pg_dump for disabled triggers on partitioned tables
pg_dump failed to preserve the 'enabled' flag (which can be not only
disabled, but also REPLICA or ALWAYS) for partitions which had it
changed from their respective parents.  Attempt to handle that by
including a definition for such triggers in the dump, but replace the
standard CREATE TRIGGER line with an ALTER TRIGGER line.

Backpatch to 11, where these triggers can exist.  In branches 11 and 12,
pick up a few test lines from commit b9b408c487 to verify that
pg_upgrade is okay with these arrangements.

Co-authored-by: Justin Pryzby <pryzby@telsasoft.com>
Co-authored-by: Álvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://postgr.es/m/20200930223450.GA14848@telsasoft.com
2021-07-16 17:29:22 -04:00
Alvaro Herrera 7584ec1f60
Preserve firing-on state when cloning row triggers to partitions
When triggers are cloned from partitioned tables to their partitions,
the 'tgenabled' flag (origin/replica/always/disable) was not propagated.
Make it so that the flag on the trigger on partition is initially set to
the same value as on the partitioned table.

Add a test case to verify the behavior.

Backpatch to 11, where this appeared in commit 86f575948c.

Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reported-by: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/20200930223450.GA14848@telsasoft.com
2021-07-16 13:01:43 -04:00
Michael Paquier b242e1d239 Fix unexpected error messages for various flavors of ALTER TABLE
Some commands of ALTER TABLE could fail with the following error:
ERROR:  "tab" is of the wrong type

This error is unexpected, as all the code paths leading to
ATWrongRelkindError() should use a supported set of relkinds to generate
correct error messages.  This commit closes the gap with such mistakes,
by adding all the missing relkind combinations.  Tests are added to
check all the problems found.  Note that some combinations are not used,
but these are left around as it could have an impact on applications
relying on this code.

2ed532e has done a much larger refactoring on HEAD to make such error
messages easier to manage in the long-term, so nothing is needed there.

Author: Kyotaro Horiguchi
Reviewed-by: Peter Eisentraut, Ahsan Hadi, Michael Paquier
Discussion: https://postgr.es/m/20210216.181415.368926598204753659.horikyota.ntt@gmail.com
Backpatch-through: 11
2021-07-14 17:15:26 +09:00
David Rowley 645c5d1193 Robustify tuplesort's free_sort_tuple function
41469253e went to the trouble of removing a theoretical bug from
free_sort_tuple by checking if the tuple was NULL before freeing it. Let's
make this a little more robust by also setting the tuple to NULL so that
should we be called again we won't end up doing a pfree on the already
pfree'd tuple. Per advice from Tom Lane.

Discussion: https://postgr.es/m/3188192.1626136953@sss.pgh.pa.us
Backpatch-through: 9.6, same as 41469253e
2021-07-13 13:30:26 +12:00
David Rowley 6f1c7a2d0f Fix theoretical bug in tuplesort
This fixes a theoretical bug in tuplesort.c which, if a bounded sort was
used in combination with a byval Datum sort (tuplesort_begin_datum), when
switching the sort to a bounded heap in make_bounded_heap(), we'd call
free_sort_tuple().  The problem was that when sorting Datums of a byval
type, the tuple is NULL and free_sort_tuple() would free the memory for it
regardless of that.  This would result in a crash.

Here we fix that simply by adding a check to see if the tuple is NULL
before trying to disassociate and free any memory belonging to it.

The reason this bug is only theoretical is that nowhere in the current
code base do we do tuplesort_set_bound() when performing a Datum sort.
However, let's backpatch a fix for this as if any extension uses the code
in this way then it's likely to cause problems.

Author: Ronan Dunklau
Discussion: https://postgr.es/m/CAApHDvpdoqNC5FjDb3KUTSMs5dg6f+XxH4Bg_dVcLi8UYAG3EQ@mail.gmail.com
Backpatch-through: 9.6, oldest supported version
2021-07-13 12:44:36 +12:00
Peter Eisentraut 9c3113e573 doc: Fix typo in function prototype 2021-07-12 22:17:18 +02:00
Heikki Linnakangas 4df5f6c26b Remove dead assignment to local variable.
This should have been removed in commit 7e30c186da, which split the loop
into two. Only the first loop uses the 'from' variable; updating it in
the second loop is bogus. It was never read after the first loop, so this
was harmless and surely optimized away by the compiler, but let's be tidy.

Backpatch to all supported versions.

Author: Ranier Vilela
Discussion: https://www.postgresql.org/message-id/CAEudQAoWq%2BAL3BnELHu7gms2GN07k-np6yLbukGaxJ1vY-zeiQ%40mail.gmail.com
2021-07-12 11:14:06 +03:00
Tom Lane 92340ba5a7 Lock the extension during ALTER EXTENSION ADD/DROP.
Although we were careful to lock the object being added or dropped,
we failed to get any sort of lock on the extension itself.  This
allowed the ALTER to proceed in parallel with a DROP EXTENSION,
which is problematic for a couple of reasons.  If both commands
succeeded we'd be left with a dangling link in pg_depend, which
would cause problems later.  Also, if the ALTER failed for some
reason, it might try to print the extension's name, and that could
result in a crash or (in older branches) a silly error message
complaining about extension "(null)".

Per bug #17098 from Alexander Lakhin.  Back-patch to all
supported branches.

Discussion: https://postgr.es/m/17098-b960f3616c861f83@postgresql.org
2021-07-11 12:54:24 -04:00
Jeff Davis 5b1621d2fb Fix assign_record_type_typmod().
If an error occurred in the wrong place, it was possible to leave an
unintialized entry in the hash table, leading to a crash. Fixed.

Also, be more careful about the order of operations so that an
allocation error doesn't leak memory in CacheMemoryContext or
unnecessarily advance NextRecordTypmod.

Backpatch through version 11. Earlier versions (prior to 35ea75632a)
do not exhibit the problem, because an uninitialized hash entry
contains a valid empty list.

Author: Sait Talha Nisanci <Sait.Nisanci@microsoft.com>
Reviewed-by: Andres Freund
Discussion: https://postgr.es/m/HE1PR8303MB009069D476225B9A9E194B8891779@HE1PR8303MB0090.EURPRD83.prod.outlook.com
Backpatch-through: 11
2021-07-10 10:28:15 -07:00
Tom Lane 03fc042eb6 Fix busted test for ldap_initialize.
Sigh ... I was expecting AC_CHECK_LIB to do something it didn't,
namely update LIBS.  This led to not finding ldap_initialize.
Fix by moving the probe for ldap_initialize.  In some sense this
is more correct anyway, since (at least for now) we care about
whether ldap_initialize exists in libldap not libldap_r.

Per buildfarm member elver and local testing.

Discussion: https://postgr.es/m/17083-a19190d9591946a7@postgresql.org
2021-07-10 13:19:31 -04:00
Dean Rasheed 357b66ef94 Fix numeric_mul() overflow due to too many digits after decimal point.
This fixes an overflow error when using the numeric * operator if the
result has more than 16383 digits after the decimal point by rounding
the result. Overflow errors should only occur if the result has too
many digits *before* the decimal point.

Discussion: https://postgr.es/m/CAEZATCUmeFWCrq2dNzZpRj5+6LfN85jYiDoqm+ucSXhb9U2TbA@mail.gmail.com
2021-07-10 12:47:45 +01:00
Tom Lane e82cde74d8 Un-break AIX build, take 2.
I incorrectly diagnosed the reason why hoverfly is unhappy.
Looking closer, it appears that it fails to link libldap
unless libssl is also present; so the problem was my
idea of clearing LIBS before making the check.  Revert
to essentially the original coding, except that instead
of failing when libldap_r isn't there, use libldap.

Per buildfarm member hoverfly.

Discussion: https://postgr.es/m/17083-a19190d9591946a7@postgresql.org
2021-07-09 16:59:08 -04:00
Tom Lane 83a8bf24ea Un-break AIX build.
In commit d0a02bdb8, I'd supposed that uniformly probing for
ldap_bind would make the intent clearer.  However, that seems
not to work on AIX, for obscure reasons (maybe it's a macro
there?).  Revert to the former behavior of probing
ldap_simple_bind for thread-safe cases and ldap_bind otherwise.

Per buildfarm member hoverfly.

Discussion: https://postgr.es/m/17083-a19190d9591946a7@postgresql.org
2021-07-09 14:15:41 -04:00
Tom Lane a5377e7f75 Update configure's probe for libldap to work with OpenLDAP 2.5.
The separate libldap_r is gone and libldap itself is now always
thread-safe.  Unfortunately there seems no easy way to tell by
inspection whether libldap is thread-safe, so we have to take
it on faith that libldap is thread-safe if there's no libldap_r.
That should be okay, as it appears that libldap_r was a standard
part of the installation going back at least 20 years.

Report and patch by Adrian Ho.  Back-patch to all supported
branches, since people might try to build any of them with
a newer OpenLDAP.

Discussion: https://postgr.es/m/17083-a19190d9591946a7@postgresql.org
2021-07-09 12:38:55 -04:00
Tom Lane 9c729bd308 Reject cases where a query in WITH rewrites to just NOTIFY.
Since the executor can't cope with a utility statement appearing
as a node of a plan tree, we can't support cases where a rewrite
rule inserts a NOTIFY into an INSERT/UPDATE/DELETE command appearing
in a WITH clause of a larger query.  (One can imagine ways around
that, but it'd be a new feature not a bug fix, and so far there's
been no demand for it.)  RewriteQuery checked for this, but it
missed the case where the DML command rewrites to *only* a NOTIFY.
That'd lead to crashes later on in planning.  Add the missed check,
and improve the level of testing of this area.

Per bug #17094 from Yaoguang Chen.  It's been busted since WITH
was introduced, so back-patch to all supported branches.

Discussion: https://postgr.es/m/17094-bf15dff55eaf2e28@postgresql.org
2021-07-09 11:02:26 -04:00
Thomas Munro c0385c6a7e Remove more obsolete comments about semaphores.
Commit 6753333f stopped using semaphores as the sleep/wake mechanism for
heavyweight locks, but some obsolete references to that scheme remained
in comments.  As with similar commit 25b93a29, back-patch all the way.

Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/CA%2BhUKGLafjB1uzXcy%3D%3D2L3cy7rjHkqOVn7qRYGBjk%3D%3DtMJE7Yg%40mail.gmail.com
2021-07-09 18:06:17 +12:00
David Rowley b186211393 Add missing Int64GetDatum macro in dbsize.c
I accidentally missed adding this when adjusting 55fe60938 for back
patching.  This adjustment was made for 9.6 to 13. 14 and master are not
affected.

Discussion: https://postgr.es/m/CAApHDvp=twCsGAGQG=A=cqOaj4mpknPBW-EZB-sd+5ZS5gCTtA@mail.gmail.com
2021-07-09 15:13:01 +12:00
David Rowley efc42a1e18 Fix incorrect return value in pg_size_pretty(bigint)
Due to how pg_size_pretty(bigint) was implemented, it's possible that when
given a negative number of bytes that the returning value would not match
the equivalent positive return value when given the equivalent positive
number of bytes.  This was due to two separate issues.

1. The function used bit shifting to convert the number of bytes into
larger units.  The rounding performed by bit shifting is not the same as
dividing.  For example -3 >> 1 = -2, but -3 / 2 = -1.  These two
operations are only equivalent with positive numbers.

2. The half_rounded() macro rounded towards positive infinity.  This meant
that negative numbers rounded towards zero and positive numbers rounded
away from zero.

Here we fix #1 by dividing the values instead of bit shifting.  We fix #2
by adjusting the half_rounded macro always to round away from zero.

Additionally, adjust the pg_size_pretty(numeric) function to be more
explicit that it's using division rather than bit shifting.  A casual
observer might have believed bit shifting was used due to a static
function being named numeric_shift_right.  However, that function was
calculating the divisor from the number of bits and performed division.
Here we make that more clear.  This change is just cosmetic and does not
affect the return value of the numeric version of the function.

Here we also add a set of regression tests both versions of
pg_size_pretty() which test the values directly before and after the
function switches to the next unit.

This bug was introduced in 8a1fab36a. Prior to that negative values were
always displayed in bytes.

Author: Dean Rasheed, David Rowley
Discussion: https://postgr.es/m/CAEZATCXnNW4HsmZnxhfezR5FuiGgp+mkY4AzcL5eRGO4fuadWg@mail.gmail.com
Backpatch-through: 9.6, where the bug was introduced.
2021-07-09 14:04:56 +12:00
Tom Lane bd2e68d0bf Avoid doing catalog lookups in postgres_fdw's conversion_error_callback.
As in 50371df26, this is a bad idea since the callback can't really
know what error is being thrown and thus whether or not it is safe
to attempt catalog accesses.  Rather than pushing said accesses into
the mainline code where they'd usually be a waste of cycles, we can
look at the query's rangetable instead.

This change does mean that we'll be printing query aliases (if any
were used) rather than the table or column's true name.  But that
doesn't seem like a bad thing: it's certainly a more useful definition
in self-join cases, for instance.  In any case, it seems unlikely that
any applications would be depending on this detail, so it seems safe
to change.

Patch by me.  Original complaint by Andres Freund; Bharath Rupireddy
noted the connection to conversion_error_callback.

Discussion: https://postgr.es/m/20210106020229.ne5xnuu6wlondjpe@alap3.anarazel.de
2021-07-06 12:36:13 -04:00
Tom Lane eda3b454a8 Doc: add info about timestamps with fractional-minute UTC offsets.
Our code has supported fractional-minute UTC offsets for ages, but
there was no mention of the possibility in the main docs, and only
a very indirect reference in Appendix B.  Improve that.

Discussion: https://postgr.es/m/162543102827.697.5755498651217979813@wrigleys.postgresql.org
2021-07-06 10:34:51 -04:00
Tom Lane 3edc2dbc00 Reduce overhead of cache-clobber testing in LookupOpclassInfo().
Commit 03ffc4d6d added logic to bypass all caching behavior in
LookupOpclassInfo when CLOBBER_CACHE_ALWAYS is enabled.  It doesn't
look like I stopped to think much about what that would cost, but
recent investigation shows that the cost is enormous: it roughly
doubles the time needed for cache-clobber test runs.

There does seem to be value in this behavior when trying to test
the opclass-cache loading logic itself, but for other purposes the
cost is excessive.  Hence, let's back off to doing this only when
debug_invalidate_system_caches_always is at least 3; or in older
branches, when CLOBBER_CACHE_RECURSIVELY is defined.

While here, clean up some other minor issues in LookupOpclassInfo.
Re-order the code so we aren't left with broken cache entries (leading
to later core dumps) in the unlikely case that we suffer OOM while
trying to allocate space for a new entry.  (That seems to be my
oversight in 03ffc4d6d.)  Also, in >= v13, stop allocating one array
entry too many.  That's evidently left over from sloppy reversion in
851b14b0c.

Back-patch to all supported branches, mainly to reduce the runtime
of cache-clobbering buildfarm animals.

Discussion: https://postgr.es/m/1370856.1625428625@sss.pgh.pa.us
2021-07-05 16:51:57 -04:00
Amit Kapila 73ede4da6b Doc: Hash Indexes.
A new chapter for Hash Indexes, designed to help users understand how
they work and when to use them.

Backpatch-through 10 where we have made hash indexes durable.

Author: Simon Riggs
Reviewed-By: Justin Pryzby, Amit Kapila
Discussion: https://postgr.es/m/CANbhV-HRjNPYgHo--P1ewBrFJ-GpZPb9_25P7=Wgu7s7hy_sLQ@mail.gmail.com
2021-07-05 10:01:28 +05:30
Michael Paquier fb38542cd8 doc: Mention requirement to --enable-tap-tests on section for TAP tests
Author: Greg Sabino Mullane
Discussion: https://postgr.es/m/CAKAnmmJYH2FBn_+Vwd2FD5SaKn8hjhAXOCHpZc6n4wXaUaW_SA@mail.gmail.com
Backpatch-through: 9.6
2021-07-04 20:59:19 +09:00
David Rowley 4a9960e0ad Doc: mention that VACUUM can't utilize over 1GB of RAM
Document that setting maintenance_work_mem to values over 1GB has no
effect on VACUUM.

Reported-by: Martín Marqués
Author: Laurenz Albe
Discussion: https://postgr.es/m/CABeG9LsZ2ozUMcqtqWu_-GiFKB17ih3p8wBHXcpfnHqhCnsc7A%40mail.gmail.com
Backpatch-through: 9.6, oldest supported release
2021-07-04 22:30:35 +12:00
Bruce Momjian 437d74f498 doc: adjust "cities" example to be consistent with other SQL
Reported-by: tom@crystae.net

Discussion: https://postgr.es/m/162345756191.14472.9754568432103008703@wrigleys.postgresql.org

Backpatch-through: 9.6
2021-07-02 20:42:46 -04:00
Tom Lane feff615573 Don't try to print data type names in slot_store_error_callback().
The existing code tried to do syscache lookups in an already-failed
transaction, which is problematic to say the least.  After some
consideration of alternatives, the best fix seems to be to just drop
type names from the error message altogether.  The table and column
names seem like sufficient localization.  If the user is unsure what
types are involved, she can check the local and remote table
definitions.

Having done that, we can also discard the LogicalRepTypMap hash
table, which had no other use.  Arguably, LOGICAL_REP_MSG_TYPE
replication messages are now obsolete as well; but we should
probably keep them in case some other use emerges.  (The complexity
of removing something from the replication protocol would likely
outweigh any savings anyhow.)

Masahiko Sawada and Bharath Rupireddy, per complaint from Andres
Freund.  Back-patch to v10 where this code originated.

Discussion: https://postgr.es/m/20210106020229.ne5xnuu6wlondjpe@alap3.anarazel.de
2021-07-02 16:04:54 -04:00
Andrew Dunstan 383c29d1e8
add missing tag from commit b8c4261e5e 2021-07-01 15:43:31 -04:00
Andrew Dunstan c71471c96f
Add new make targets world-bin and install-world-bin
These are the same as world and install-world respectively, but without
building or installing the documentation. There are many reasons for
wanting to be able to do this, including speed, lack of documentation
building tools, and wanting to build other formats of the documentation.
Plans for simplifying the buildfarm client code include using these
targets.

Backpatch to all live branches.

Discussion: https://postgr.es/m/6a421136-d462-b043-a8eb-e75b2861f3df@dunslane.net
2021-07-01 14:51:54 -04:00