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Source-Git-URL: git://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash: cda21c1d7b160b303dc21dfe9d4169f2c8064c60
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Due to simplistic quoting and confusion of database names with conninfo
strings, roles with the CREATEDB or CREATEROLE option could escalate to
superuser privileges when a superuser next ran certain maintenance
commands. The new coding rule for PQconnectdbParams() calls, documented
at conninfo_array_parse(), is to pass expand_dbname=true and wrap
literal database names in a trivial connection string. Escape
zero-length values in appendConnStrVal(). Back-patch to 9.1 (all
supported versions).
Nathan Bossart, Michael Paquier, and Noah Misch. Reviewed by Peter
Eisentraut. Reported by Nathan Bossart.
Security: CVE-2016-5424
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Rename these newly-extern functions with terms more typical of their new
neighbors. No functional changes; a subsequent commit will use them in
more places. Back-patch to 9.1 (all supported versions). Back branches
lack src/fe_utils, so instead rename the functions in place; the
subsequent commit will copy them into the other programs using them.
Security: CVE-2016-5424
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The incorrect quoting may have permitted arbitrary command execution.
At a minimum, it gave broader control over the command line to actors
supposed to have control over a single argument. Back-patch to 9.1 (all
supported versions).
Security: CVE-2016-5424
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These characters prematurely terminate Windows shell command processing,
causing the shell to execute a prefix of the intended command. The
chief alternative to rejecting these characters was to bypass the
Windows shell with CreateProcess(), but the ability to use such names
has little value. Back-patch to 9.1 (all supported versions).
This change formally revokes support for these characters in database
names and roles names. Don't document this; the error message is
self-explanatory, and too few users would benefit. A future major
release may forbid creation of databases and roles so named. For now,
check only at known weak points in pg_dumpall. Future commits will,
without notice, reject affected names from other frontend programs.
Also extend the restriction to pg_dumpall --dbname=CONNSTR arguments and
--file arguments. Unlike the effects on role name arguments and
database names, this does not reflect a broad policy change. A
migration to CreateProcess() could lift these two restrictions.
Reviewed by Peter Eisentraut.
Security: CVE-2016-5424
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Since -c plus -C requests dropping and recreating the target database
as a whole, not dropping individual objects in it, we should assume that
the public schema already exists and need not be created. The previous
coding considered only the state of the -c option, so it would emit
"CREATE SCHEMA public" anyway, leading to an unexpected error in restore.
Back-patch to 9.2. Older versions did not accept -c with -C so the
issue doesn't arise there. (The logic being patched here dates to 8.0,
cf commit 2193121fa, so it's not really wrong that it didn't consider
the case at the time.)
Note that versions before 9.6 will still attempt to emit REVOKE/GRANT
on the public schema; but that happens without -c/-C too, and doesn't
seem to be the focus of this complaint. I considered extending this
stanza to also skip the public schema's ACL, but that would be a
misfeature, as it'd break cases where users intentionally changed that
ACL. The real fix for this aspect is Stephen Frost's work to not dump
built-in ACLs, and that's not going to get back-ported.
Per bugs #13804 and #14271. Solution found by David Johnston and later
rediscovered by me.
Report: <20151207163520.2628.95990@wrigleys.postgresql.org>
Report: <20160801021955.1430.47434@wrigleys.postgresql.org>
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With the refactoring of pg_dump to handle components, getOwnedSeqs needs
to be a bit more intelligent regarding which components to dump when.
Specifically, we can't simply use the owning table's components as the
set of components to dump as the table might only be including certain
components while all components of the sequence should be dumped, for
example, when the table is a member of an extension while the sequence
is not.
Handle this by combining the set of components to be dumped for the
sequence explicitly and those to be dumped for the table when setting
the components to be dumped for the sequence.
Also add a number of regression tests around this to, hopefully, catch
any future changes which break the expected behavior.
Discovered by: Philippe BEAUDOIN
Reviewed by: Michael Paquier
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Source-Git-URL: git://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash: 3d71988dffd3c0798a8864c55ca4b7833b48abb1
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To ensure that "make installcheck" can be used safely against an existing
installation, we need to be careful about what global object names
(database, role, and tablespace names) we use; otherwise we might
accidentally clobber important objects. There's been a weak consensus that
test databases should have names including "regression", and that test role
names should start with "regress_", but we didn't have any particular rule
about tablespace names; and neither of the other rules was followed with
any consistency either.
This commit moves us a long way towards having a hard-and-fast rule that
regression test databases must have names including "regression", and that
test role and tablespace names must start with "regress_". It's not
completely there because I did not touch some test cases in rolenames.sql
that test creation of special role names like "session_user". That will
require some rethinking of exactly what we want to test, whereas the intent
of this patch is just to hit all the cases in which the needed renamings
are cosmetic.
There is no enforcement mechanism in this patch either, but if we don't
add one we can expect that the tests will soon be violating the convention
again. Again, that's not such a cosmetic change and it will require
discussion. (But I did use a quick-hack enforcement patch to find these
cases.)
Discussion: <16638.1468620817@sss.pgh.pa.us>
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Dump out the appropriate GRANT/REVOKE commands for databases and
tablespaces from pg_dumpall to replicate what the current state is.
This was broken during the changes to buildACLCommands for 9.6+
servers for pg_init_privs.
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The original specification for this called for the deserialization function
to have signature "deserialize(serialtype) returns transtype", which is a
security violation if transtype is INTERNAL (which it always would be in
practice) and serialtype is not (which ditto). The patch blithely overrode
the opr_sanity check for that, which was sloppy-enough work in itself,
but the indisputable reason this cannot be allowed to stand is that CREATE
FUNCTION will reject such a signature and thus it'd be impossible for
extensions to create parallelizable aggregates.
The minimum fix to make the signature type-safe is to add a second, dummy
argument of type INTERNAL. But to lock it down a bit more and make misuse
of INTERNAL-accepting functions less likely, let's get rid of the ability
to specify a "serialtype" for an aggregate and just say that the only
useful serialtype is BYTEA --- which, in practice, is the only interesting
value anyway, due to the usefulness of the send/recv infrastructure for
this purpose. That means we only have to allow "serialize(internal)
returns bytea" and "deserialize(bytea, internal) returns internal" as
the signatures for these support functions.
In passing fix bogus signature of int4_avg_combine, which I found thanks
to adding an opr_sanity check on combinefunc signatures.
catversion bump due to removing pg_aggregate.aggserialtype and adjusting
signatures of assorted built-in functions.
David Rowley and Tom Lane
Discussion: <27247.1466185504@sss.pgh.pa.us>
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Source-Git-URL: git://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash: 0c374f8d25ed31833a10d24252bc928d41438838
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We disable statement_timeout and lock_timeout during dump and restore, to
prevent any global settings that might exist from breaking routine backups.
Commit c6dda1f48 should have added idle_in_transaction_session_timeout to
that list, but failed to.
Another place where these timeouts get turned off is autovacuum. While
I doubt an idle timeout could fire there, it seems better to be safe than
sorry.
pg_dump issue noted by Bernd Helmle, the other one found by grepping.
Report: <352F9B77DB5D3082578D17BB@eje.land.credativ.lan>
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dumpAccessMethod() didn't get the memo that we now have a bitfield for
the components which should be dumped instead of a simple boolean.
Correct that by checking if the relevant bit is set for each component
being dumped out (and not dumping it out if it isn't set).
This corrects an issue where CREATE ACCESS METHOD commands were being
included in non-binary-upgrades when an extension included an access
method (as the bloom extensions does).
Also add a regression test to make sure that we only dump out the
ACCESS METHOD commands, when they are part of an extension, when doing
a binary upgrade.
Pointed out by Thom Brown.
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Adopt the same solution as in commit aa90e148ca70a235, but this time
let's put the ugliness inside the write_stderr() macro, instead of
expecting each call site to deal with it. Back-port that decision
into psql/common.c where I got the macro from in the first place.
Per gripe from Peter Eisentraut.
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Mostly these are just comments but there are a few in documentation
and a handful in code and tests. Hopefully this doesn't cause too much
unnecessary pain for backpatching. I relented from some of the most
common like "thru" for that reason. The rest don't seem numerous
enough to cause problems.
Thanks to Kevin Lyda's tool https://pypi.python.org/pypi/misspellings
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Formerly, Unix builds of pg_dump/pg_restore would trap SIGINT and similar
signals and set a flag that was tested in various data-transfer loops.
This was prone to errors of omission (cf commit 3c8aa6654); and even if
the client-side response was prompt, we did nothing that would cause
long-running SQL commands (e.g. CREATE INDEX) to terminate early.
Also, the master process would effectively do nothing at all upon receipt
of SIGINT; the only reason it seemed to work was that in typical scenarios
the signal would also be delivered to the child processes. We should
support termination when a signal is delivered only to the master process,
though.
Windows builds had no console interrupt handler, so they would just fall
over immediately at control-C, again leaving long-running SQL commands to
finish unmolested.
To fix, remove the flag-checking approach altogether. Instead, allow the
Unix signal handler to send a cancel request directly and then exit(1).
In the master process, also have it forward the signal to the children.
On Windows, add a console interrupt handler that behaves approximately
the same. The main difference is that a single execution of the Windows
handler can send all the cancel requests since all the info is available
in one process, whereas on Unix each process sends a cancel only for its
own database connection.
In passing, fix an old problem that DisconnectDatabase tends to send a
cancel request before exiting a parallel worker, even if nothing went
wrong. This is at least a waste of cycles, and could lead to unexpected
log messages, or maybe even data loss if it happened in pg_restore (though
in the current code the problem seems to affect only pg_dump). The cause
was that after a COPY step, pg_dump was leaving libpq in PGASYNC_BUSY
state, causing PQtransactionStatus() to report PQTRANS_ACTIVE. That's
normally harmless because the next PQexec() will silently clear the
PGASYNC_BUSY state; but in a parallel worker we might exit without any
additional SQL commands after a COPY step. So add an extra PQgetResult()
call after a COPY to allow libpq to return to PGASYNC_IDLE state.
This is a bug fix, IMO, so back-patch to 9.3 where parallel dump/restore
were introduced.
Thanks to Kyotaro Horiguchi for Windows testing and code suggestions.
Original-Patch: <7005.1464657274@sss.pgh.pa.us>
Discussion: <20160602.174941.256342236.horiguchi.kyotaro@lab.ntt.co.jp>
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Parallel dump did a totally pointless query to find out the name of each
table to be dumped, which it already knows. Parallel restore runs issued
lots of redundant SET commands because _doSetFixedOutputState() was invoked
once per TOC item rather than just once at connection start. While the
extra queries are insignificant if you're dumping or restoring large
tables, it still seems worth getting rid of them.
Also, give the responsibility for selecting the right client_encoding for
a parallel dump worker to setup_connection() where it naturally belongs,
instead of having ad-hoc code for that in CloneArchive(). And fix some
minor bugs like use of strdup() where pg_strdup() would be safer.
Back-patch to 9.3, mostly to keep the branches in sync in an area that
we're still finding bugs in.
Discussion: <5086.1464793073@sss.pgh.pa.us>
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Parallel restore from directory format failed to respond to control-C
in a timely manner, because there were no checkAborting() calls in the
code path that reads data from a file and sends it to the backend.
If any worker was in the midst of restoring data for a large table,
you'd just have to wait.
This fix doesn't do anything for the problem of aborting a long-running
server-side command, but at least it fixes things for data transfers.
Back-patch to 9.3 where parallel restore was introduced.
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This was effectively dead code, since the places that tested it could not
be reached after we entered the on-exit-cleanup routine that would set it.
It seems to have been a leftover from a design in which error abort would
try to send fresh commands to the workers --- a design which could never
have worked reliably, of course. Since the flag is not cross-platform, it
complicates reasoning about the code's behavior, which we could do without.
Although this is effectively just cosmetic, back-patch anyway, because
there are some actual bugs in the vicinity of this behavior.
Discussion: <15583.1464462418@sss.pgh.pa.us>
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The commentary in this file was in extremely sad shape. The author(s)
had clearly never heard of the project convention that a function header
comment should provide an API spec of some sort for that function. Much
of it was flat out wrong, too --- maybe it was accurate when written, but
if so it had not been updated to track subsequent code revisions. Rewrite
and rearrange to try to bring it up to speed, and annotate some of the
places where more work is needed. (I've refrained from actually fixing
anything of substance ... yet.)
Also, rename a couple of functions for more clarity as to what they do,
do some very minor code rearrangement, remove some pointless Asserts,
fix an incorrect Assert in readMessageFromPipe, and add a missing socket
close in one error exit from pgpipe(). The last would be a bug if we
tried to continue after pgpipe() failure, but since we don't, it's just
cosmetic at present.
Although this is only cosmetic, back-patch to 9.3 where parallel.c was
added. It's sufficiently invasive that it'll pose a hazard for future
back-patching if we don't.
Discussion: <25239.1464386067@sss.pgh.pa.us>
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Since we start the worker threads with _beginthreadex(), we should use
_endthreadex() to terminate them. We got this right in the normal-exit
code path, but not so much during an error exit from a worker.
In addition, be sure to apply CloseHandle to the thread handle after
each thread exits.
It's not clear that these oversights cause any user-visible problems,
since the pg_dump run is about to terminate anyway. Still, it's clearly
better to follow Microsoft's API specifications than ignore them.
Also a few cosmetic cleanups in WaitForTerminatingWorkers(), including
being a bit less random about where to cast between uintptr_t and HANDLE,
and being sure to clear the worker identity field for each dead worker
(not that false matches should be possible later, but let's be careful).
Original observation and patch by Armin Schöffmann, cosmetic improvements
by Michael Paquier and me. (Armin's patch also included closing sockets
in ShutdownWorkersHard(), but that's been dealt with already in commit
df8d2d8c4.) Back-patch to 9.3 where parallel pg_dump was introduced.
Discussion: <zarafa.570306bd.3418.074bf1420d8f2ba2@root.aegaeon.de>
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Getting a synchronized snapshot is not supported on a hot standby node,
and is by default taken when using -j with multiple sessions. Trying to
do so still failed, but with a server error that would also go in the
log. Instead, proprely detect this case and give a better error message.
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For some reason the code to emit a warning and switch to uncompressed
output was placed down in the guts of pg_backup_archiver.c. This is
definitely too late in the case of parallel operation (and I rather
wonder if it wasn't too late for other purposes as well). Put it in
pg_dump.c's option-processing logic, which seems a much saner place.
Also, the default behavior with custom or directory output format was
to emit the warning telling you the output would be uncompressed. This
seems unhelpful, so silence that case.
Back-patch to 9.3 where parallel dump was introduced.
Kyotaro Horiguchi, adjusted a bit by me
Report: <20160526.185551.242041780.horiguchi.kyotaro@lab.ntt.co.jp>
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The Windows coding of ShutdownWorkersHard() thought that setting termEvent
was sufficient to make workers exit after an error. But that only helps
if a worker is busy and passes through checkAborting(). An idle worker
will just sit, resulting in pg_dump failing to exit until the user gives up
and hits control-C. We should close the write end of the command pipe
so that idle workers will see socket EOF and exit, as the Unix coding was
already doing.
Back-patch to 9.3 where parallel pg_dump was introduced.
Kyotaro Horiguchi
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In the original design for parallel dump, worker processes reported errors
by sending them up to the master process, which would print the messages.
This is unworkably fragile for a couple of reasons: it risks deadlock if a
worker sends an error at an unexpected time, and if the master has already
died for some reason, the user will never get to see the error at all.
Revert that idea and go back to just always printing messages to stderr.
This approach means that if all the workers fail for similar reasons (eg,
bad password or server shutdown), the user will see N copies of that
message, not only one as before. While that's slightly annoying, it's
certainly better than not seeing any message; not to mention that we
shouldn't assume that only the first failure is interesting.
An additional problem in the same area was that the master failed to
disable SIGPIPE (at least until much too late), which meant that sending a
command to an already-dead worker would cause the master to crash silently.
That was bad enough in itself but was made worse by the total reliance on
the master to print errors: even if the worker had reported an error, you
would probably not see it, depending on timing. Instead disable SIGPIPE
right after we've forked the workers, before attempting to send them
anything.
Additionally, the master relies on seeing socket EOF to realize that a
worker has exited prematurely --- but on Windows, there would be no EOF
since the socket is attached to the process that includes both the master
and worker threads, so it remains open. Make archive_close_connection()
close the worker end of the sockets so that this acts more like the Unix
case. It's not perfect, because if a worker thread exits without going
through exit_nicely() the closures won't happen; but that's not really
supposed to happen.
This has been wrong all along, so back-patch to 9.3 where parallel dump
was introduced.
Report: <2458.1450894615@sss.pgh.pa.us>
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When pulling the list of roles to drop, exclude roles whose names
begin with "pg_" (as we do when we are dumping the roles out to
recreate them).
Also add regression tests to cover pg_dumpall -c and this specific
issue.
Noticed by Rushabh Lathia. Patch by me.
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All of the other tables used in the query in dumpTable(), which is
collecting column-level ACLs, are qualified, so we should be qualifying
the pg_init_privs, the related sub-select against pg_class and the
other queries added by the pg_dump catalog ACLs work.
Also, use ::regclass (or ::pg_catalog.regclass, where appropriate)
instead of using a poorly constructed query to get the OID for various
catalog tables.
Issues identified by Noah and Alvaro, patch by me.
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Source-Git-URL: git://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash: 17bf3e8564abf600274789fcc90e72532d5e7c05
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It emerges that some Perl versions before 5.8.9 have a bug with regexps
that use the /m flag and contain "$". This is the reason why jacana
is still failing on HEAD, and I was able to duplicate the failure on
prairiedog's host. There's no real need for "$" in these patterns,
since they are already matching through the statement-terminating
semicolons (or matching an explicit \n in some cases). So just
remove it.
Note: the reason jacana hasn't actually reported any failures in the
last little while is that the way the pg_dump TAP tests are set up, any
failure of this sort results in echoing the entire pg_dump dump output
to stderr. Since there were about a hundred such failures, that resulted
in a 30MB log file which choked the buildfarm upload script. There is
room for improvement here :-(.
Per off-list discussion with Andrew and Stephen.
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The tmp_check directory needs to be removed by "make clean",
and also ignored by .gitignore.
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Buildfarm member jacana appears to have an issue with running this
test. It's not entirely clear to me why, but rather than try to
fight with it, just disable it for now.
None of the other tests try to write out from psql directly as
this test does, so it seems likely that the rest of the tests will
be fine (as they have been on numerous other systems).
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We need to use a new branch due to the 9.5 addition of bypassrls
when adding in the clause to exclude pg_* roles from being dumped
by pg_dumpall.
Pointed out by Noah, patch by me.
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The Makefile for test_pg_dump shouldn't have a MODULES_big line
because there's no actual compiled bit for that extension. Hopefully
this will fix the Windows buildfarm members which were complaining.
In passing, also add the 'prove_installcheck' bit to the pg_dump and
test_pg_dump Makefiles, to get the buildfarm members to actually run
those tests.
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This TAP test suite will create a new cluster, populate it based on
the 'create_sql' values in the '%tests' hash, run all of the runs
defined in the '%pgdump_runs' hash, and then for each test in the
'%tests' hash, compare each run's output the the regular expression
defined for the test under the 'like' and 'unlike' functions, as
appropriate.
While this test suite covers a fair bit of ground (67% of pg_dump.c
and quite a bit of the other files in src/bin/pg_dump), there is
still quite a bit which remains to be added to provide better code
coverage. Still, this is quite a bit better than we had, and has
found a few bugs already (note that the CREATE TRANSFORM test is
commented out, as it is currently failing).
Idea for using the TAP system from Tom, though all of the code is mine.
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Reviewing the cases where we need to LOCK a given table during a dump,
it was pointed out by Tom that we really don't need to LOCK a table if
we are only looking to dump the ACL for it, or certain other
components. After reviewing the queries run for all of the component
pieces, a list of components were determined to not require LOCK'ing
of the table.
This implements a check to avoid LOCK'ing those tables.
Initial complaint from Rushabh Lathia, discussed with Robert and Tom,
the patch is mine.
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Do not try to dump objects which do not have ACLs when only ACLs are
being requested. This results in a significant performance improvement
as we can avoid querying for further information on these objects when
we don't need to.
When limiting the components to dump for an extension, consider what
components have been requested. Initially, we incorrectly hard-coded
the components of the extension objects to dump, which would mean that
we wouldn't dump some components even with they were asked for and in
other cases we would dump components which weren't requested.
Correct defaultACLs to use 'dump_contains' instead of 'dump'. The
defaultACL is considered a member of the namespace and should be
dumped based on the same set of components that the other objects in
the schema are, not based on what we're dumping for the namespace
itself (which might not include ACLs, if the namespace has just the
default or initial ACL).
Use DUMP_COMPONENT_ACL for from-initdb objects, to allow users to
change their ACLs, should they wish to. This just extends what we
are doing for the pg_catalog namespace to objects which are not
members of namespaces.
Due to column ACLs being treated a bit differently from other ACLs
(they are actually reset to NULL when all privileges are revoked),
adjust the query which gathers column-level ACLs to consider all of
the ACL-relevant columns.
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The query to grab the function/aggregate information is now joining
to pg_init_privs, so we can simplify (and correct) the WHERE clause
used to determine if a given function's ACL has changed from the
initial ACL on the function.
Bug found by Noah, patch by me.
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Move fmtReloptionsArray() from pg_dump.c to string_utils.c so that it
is available to other frontend code. In particular psql's \ev and \sv
commands need it to handle view reloptions. Also rename the function
to appendReloptionsArray(), which is a more accurate description of
what it does.
Author: Dean Rasheed
Reviewed-by: Peter Eisentraut
Discussion: http://www.postgresql.org/message-id/CAEZATCWZjCgKRyM-agE0p8ax15j9uyQoF=qew7D2xB6cF76T8A@mail.gmail.com
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forgotten in b6dacc173b6830c515d970698cead9a85663c553
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This was an oversight in commit 41ea0c23761ca108e2f08f6e3151e3cb1f9652a1.
Fabrízio de Royes Mello, per a report from Tushar Ahuja
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As reported by Michael Feld, pg_upgrade'ing an installation having
extensions with operator families that contain just a single operator class
failed to reproduce the extension membership of those operator families.
This caused no immediate ill effects, but would create problems when later
trying to do a plain dump and restore, because the seemingly-not-part-of-
the-extension operator families would appear separately in the pg_dump
output, and then would conflict with the families created by loading the
extension. This has been broken ever since extensions were introduced,
and many of the standard contrib extensions are affected, so it's a bit
astonishing nobody complained before.
The cause of the problem is a perhaps-ill-considered decision to omit
such operator families from pg_dump's output on the grounds that the
CREATE OPERATOR CLASS commands could recreate them, and having explicit
CREATE OPERATOR FAMILY commands would impede loading the dump script into
pre-8.3 servers. Whatever the merits of that decision when 8.3 was being
written, it looks like a poor tradeoff now. We can fix the pg_upgrade
problem simply by removing that code, so that the operator families are
dumped explicitly (and then will be properly made to be part of their
extensions).
Although this fixes the behavior of future pg_upgrade runs, it does nothing
to clean up existing installations that may have improperly-linked operator
families. Given the small number of complaints to date, maybe we don't
need to worry about providing an automated solution for that; anyone who
needs to clean it up can do so with manual "ALTER EXTENSION ADD OPERATOR
FAMILY" commands, or even just ignore the duplicate-opfamily errors they
get during a pg_restore. In any case we need this fix.
Back-patch to all supported branches.
Discussion: <20228.1460575691@sss.pgh.pa.us>
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Coverity complained about this resource leak (why now, I don't know,
since it's been like that a long time). Our general policy in pg_dump
is that PQExpBuffers are worth cleaning up, so do it here too. But
don't bother with a back-patch, because it seems unlikely that very
many databases contain enough FOREIGN SERVER objects to notice.
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This will prevent users from creating roles which begin with "pg_" and
will check for those roles before allowing an upgrade using pg_upgrade.
This will allow for default roles to be provided at initdb time.
Reviews by José Luis Tallón and Robert Haas
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Now that 'dump' is a bitmap, we can't simply set it to 'true'.
Noticed while debugging the prior issue.
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Pretty sure I removed this based on some incorrect thinking that it was
no longer possible to reach this point for a table which will not be
dumped, but that's clearly wrong.
Pointed out on IRC by Erik Rijkers.
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