Prior to 9.0, pg_dump handled comments on large objects by dumping a bunch
of COMMENT commands into a single BLOB COMMENTS archive object. With
sufficiently many such comments, some of the commands would likely get
split across bufferloads when restoring, causing failures in
direct-to-database restores (though no problem would be evident in text
output). This is the same type of issue we have with table data dumped as
INSERT commands, and it can be fixed in the same way, by using a mini SQL
lexer to figure out where the command boundaries are. Fortunately, the
COMMENT commands are no more complex to lex than INSERTs, so we can just
re-use the existing lexer for INSERTs.
Per bug #10611 from Jacek Zalewski. Back-patch to all active branches.
It's critical that the backend's idea of LOBLKSIZE match the way data has
actually been divided up in pg_largeobject. While we don't provide any
direct way to adjust that value, doing so is a one-line source code change
and various people have expressed interest recently in changing it. So,
just as with TOAST_MAX_CHUNK_SIZE, it seems prudent to record the value in
pg_control and cross-check that the backend's compiled-in setting matches
the on-disk data.
Also tweak the code in inv_api.c so that fetches from pg_largeobject
explicitly verify that the length of the data field is not more than
LOBLKSIZE. Formerly we just had Asserts() for that, which is no protection
at all in production builds. In some of the call sites an overlength data
value would translate directly to a security-relevant stack clobber, so it
seems worth one extra runtime comparison to be sure.
In the back branches, we can't change the contents of pg_control; but we
can still make the extra checks in inv_api.c, which will offer some amount
of protection against running with the wrong value of LOBLKSIZE.
Previously there's been a mix between 'slotname' and 'slot_name'. It's
not nice to be unneccessarily inconsistent in a new feature. As a post
beta1 initdb now is required in the wake of eeca4cd35e, fix the
inconsistencies.
Most the changes won't affect usage of replication slots because the
majority of changes is around function parameter names. The prominent
exception to that is that the recovery.conf parameter
'primary_slotname' is now named 'primary_slot_name'.
Commit 5035701e07 improved xlog.c's method
for creating a database system identifier, but I neglected to fix the
copy of that code appearing in pg_resetxlog.c. Spotted by Andres Freund.
The bug was caused by omitting 'I:' from the short argument list to
getopt_long(). To make similar bugs in the future less likely reorder
options in --help, long and short option lists to be in the same,
alphabetical within groups, order.
Report and fix by Michael Paquier, some additional reordering by me.
Let's complain about e.g an invalid path or permission problem sooner rather
than later. Before this patch, we would only try to open the output file
after receiving the first decoded message from the server.
In yesterday's commit 2dc4f011fd, I tried
to force buffering of stdout/stderr in initdb to be what it is by
default when the program is run interactively on Unix (since that's how
most manual testing is done). This tripped over the fact that Windows
doesn't support _IOLBF mode. We dealt with that a long time ago in
syslogger.c by falling back to unbuffered mode on Windows. Export that
solution in port.h and use it in initdb.
Back-patch to 8.4, like the previous commit.
Don't close stdout on SIGHUP. Also, when a SIGHUP is received, close the
file immediately, rather than only after receiving some more data from
the server. Rename a variable, to avoid mentally dealing with double
negatives (not unsynced means synced).
Since this program may print to either stdout or stderr, the relative
ordering of its messages depends on the buffering behavior of those files.
Force stdout to be line-buffered and stderr to be unbuffered, ensuring
that the behavior will match standard Unix interactive behavior, even
when stdout and stderr are rerouted to a file.
Per complaint from Tomas Vondra. The particular case he pointed out is
new in HEAD, but issues of the same sort could arise in any branch with
other error messages, so back-patch to all branches.
I'm unsure whether we might not want to do this in other client programs
as well. For the moment, just fix initdb.
Historically we've printed a complaint for a bad locale setting, but then
fallen back to the environment default. Per discussion, this is not such
a great idea, because rectifying an erroneous locale choice post-initdb
(perhaps long after data has been loaded) could be enormously expensive.
Better to complain and give the user a chance to double-check things.
The behavior was particularly bad if the bad setting came from environment
variables rather than a bogus command-line switch: in that case not only
was there a fallback to C/SQL_ASCII, but the printed complaint was quite
unhelpful. It's hard to be entirely sure what variables setlocale looked
at, but we can at least give a hint where the problem might be.
Per a complaint from Tomas Vondra.
The leak is fairly small and rare, but a leak nevertheless.
Per Coverity report. Backpatch to 9.2, where pg_receivexlog was added.
pg_basebackup shares the code, but it always exits on error, so there is
no real leak.
Commit d298b50a3b by Heikki Linnakangas
requested that the version check message be updated at next release, suggesting
that the appropriate text would be “9.3 or later”. The logic used for the check
indicates that the correct text for 9.4 is “9.3 or 9.4”, since the logic would
cause this to fail for later releases.
This was accidentally broken in commits cfa1b4a711/5e8e794e3b.
It saves a line or so to call ftello unconditionally in _CloseArchive,
but we have to expect that it might fail if we're not in hasSeek mode.
Per report from Bernd Helmle.
In passing, improve _getFilePos to print an appropriate message if
ftello fails unexpectedly, rather than just a vague complaint about
"ftell mismatch".
It's easy to forget using SYSTEMQUOTEs when constructing command strings
for system() or popen(). Even if we fix all the places missing it now, it is
bound to be forgotten again in the future. Introduce wrapper functions that
do the the extra quoting for you, and get rid of SYSTEMQUOTEs in all the
callers.
We previosly used SYSTEMQUOTEs in all the hard-coded command strings, and
this doesn't change the behavior of those. But user-supplied commands, like
archive_command, restore_command, COPY TO/FROM PROGRAM calls, as well as
pgbench's \shell, will now gain an extra pair of quotes. That is desirable,
but if you have existing scripts or config files that include an extra
pair of quotes, those might need to be adjusted.
Reviewed by Amit Kapila and Tom Lane
Some popen() calls were missing SYSTEMQUOTEs, which caused initdb and
pg_upgrade to fail on Windows, if the installation path contained both
spaces and @ signs.
Patch by Nikhil Deshpande. Backpatch to all supported versions.
feasible to display tables that have both many columns and some large
data in some columns (such as pg_stats).
Emre Hasegeli with review and rewriting from Sergey Muraviov and
reviewed by Greg Stark
Commit 7d0f493f19 added infrastructure
to perform tests in assorted src/bin/ subdirectories, but forgot to
teach "make clean" to clean up the detritus the tests leave behind.
Before 9.4, such an aggregate couldn't be declared, because its final
function would have to have polymorphic result type but no polymorphic
argument, which CREATE FUNCTION would quite properly reject. The
ordered-set-aggregate patch found a workaround: allow the final function
to be declared as accepting additional dummy arguments that have types
matching the aggregate's regular input arguments. However, we failed
to notice that this problem applies just as much to regular aggregates,
despite the fact that we had a built-in regular aggregate array_agg()
that was known to be undeclarable in SQL because its final function
had an illegal signature. So what we should have done, and what this
patch does, is to decouple the extra-dummy-arguments behavior from
ordered-set aggregates and make it generally available for all aggregate
declarations. We have to put this into 9.4 rather than waiting till
later because it slightly alters the rules for declaring ordered-set
aggregates.
The patch turned out a bit bigger than I'd hoped because it proved
necessary to record the extra-arguments option in a new pg_aggregate
column. I'd thought we could just look at the final function's pronargs
at runtime, but that didn't work well for variadic final functions.
It's probably just as well though, because it simplifies life for pg_dump
to record the option explicitly.
While at it, fix array_agg() to have a valid final-function signature,
and add an opr_sanity test to notice future deviations from polymorphic
consistency. I also marked the percentile_cont() aggregates as not
needing extra arguments, since they don't.
Previously it wasn't clear from --help that -F, -R, -z, -0 only
controlled psql unaligned output.
Initial patch from Jov <amutu@amutu.com>, adjustments by me
According to the Single Unix Spec and assorted man pages, you're supposed
to use the constants named AF_xxx when setting ai_family for a getaddrinfo
call. In a few places we were using PF_xxx instead. Use of PF_xxx
appears to be an ancient BSD convention that was not adopted by later
standardization. On BSD and most later Unixen, it doesn't matter much
because those constants have equivalent values anyway; but nonetheless
this code is not per spec.
In the same vein, replace PF_INET by AF_INET in one socket() call, which
wasn't even consistent with the other socket() call in the same function
let alone the remainder of our code.
Per investigation of a Cygwin trouble report from Marco Atzeri. It's
probably a long shot that this will fix his issue, but it's wrong in
any case.
In psql \d+, display oids only when they exist, and display replication
identity only when it is non-default. Also document the defaults for
replication identity for system and non-system tables. Update
regression output.
Add vacuumdb option --analyze-in-stages which runs ANALYZE three times
with different configuration settings, adopting the logic from the
analyze_new_cluster.sh script that pg_upgrade generates. That way,
users of pg_dump/pg_restore can also use that functionality.
Change pg_upgrade to create the script so that it calls vacuumdb instead
of implementing the logic itself.
Until now, when executing an aggregate function as a window function
within a window with moving frame start (that is, any frame start mode
except UNBOUNDED PRECEDING), we had to recalculate the aggregate from
scratch each time the frame head moved. This patch allows an aggregate
definition to include an alternate "moving aggregate" implementation
that includes an inverse transition function for removing rows from
the aggregate's running state. As long as this can be done successfully,
runtime is proportional to the total number of input rows, rather than
to the number of input rows times the average frame length.
This commit includes the core infrastructure, documentation, and regression
tests using user-defined aggregates. Follow-on commits will update some
of the built-in aggregates to use this feature.
David Rowley and Florian Pflug, reviewed by Dean Rasheed; additional
hacking by me
There's no really compelling reason to refuse to do these read-only,
non-server-starting options as root, and there's at least one good
reason to allow -C: pg_ctl uses -C to find out the true data directory
location when pointed at a config-only directory. On Windows, this is
done before dropping administrator privileges, which means that pg_ctl
fails for administrators if and only if a config-only layout is used.
Since the root-privilege check is done so early in startup, it's a bit
awkward to check for these switches. Make the somewhat arbitrary
decision that we'll only skip the root check if -C is the first switch.
This is not just to make the code a bit simpler: it also guarantees that
we can't misinterpret a --boot mode switch. (While AuxiliaryProcessMain
doesn't currently recognize any such switch, it might have one in the
future.) This is no particular problem for pg_ctl, and since the whole
behavior is undocumented anyhow, it's not a documentation issue either.
(--describe-config only works as the first switch anyway, so this is
no restriction for that case either.)
Back-patch to 9.2 where pg_ctl first began to use -C.
MauMau, heavily edited by me
This is needed because Windows services may get started with a different
current directory than where pg_ctl is executed. We want relative -D
paths to be interpreted relative to pg_ctl's CWD, similarly to what
happens on other platforms.
In support of this, move the backend's make_absolute_path() function
into src/port/path.c (where it probably should have been long since)
and get rid of the rather inferior version in pg_regress.
Kumar Rajeev Rastogi, reviewed by MauMau
It is possible for a view or materialized view to depend on a table's
primary key, if the view query relies on functional dependency to
abbreviate a GROUP BY list. This is problematic for pg_dump since we
ordinarily want to dump view definitions in the pre-data section but
indexes in post-data. pg_dump knows how to deal with this situation for
regular views, by breaking the view's ON SELECT rule apart from the view
proper. But it had not been taught what to do about materialized views,
and in fact mistakenly dumped them as regular views in such cases, as
seen in bug #9616 from Jesse Denardo.
If we had CREATE OR REPLACE MATERIALIZED VIEW, we could fix this in a
manner analogous to what's done for regular views; but we don't yet,
and we'd not back-patch such a thing into 9.3 anyway. As a hopefully-
temporary workaround, break the circularity by postponing the matview
into post-data altogether when this case occurs.
Display "replica identity" only for \d plus mode, exclude system schema
objects, and display all possible values, not just non-default,
non-index ones.
Clear errno before calling readdir() and handle old MinGW errno bug
while adding full test coverage for readdir/closedir failures.
Backpatch through 8.4.
Previously, psql would print the "COPY nnn" command status only for COPY
commands executed server-side. Now it will print that for frontend copies
too (including \copy). However, we continue to suppress the command status
for COPY TO STDOUT, since in that case the copy data has been routed to the
same place that the command status would go, and there is a risk of the
status line being mistaken for another line of COPY data. Doing that would
break existing scripts, and it doesn't seem worth the benefit --- this case
seems fairly analogous to SELECT, for which we also suppress the command
status.
Kumar Rajeev Rastogi, with substantial review by Amit Khandekar
Commit 08146775ac changed do_copy() to
temporarily scribble on pset.cur_cmd_source. That was a mighty ugly bit of
code in any case, but in particular it broke handleCopyIn's ability to tell
whether it was reading from the current script source file (in which case
pset.lineno should be incremented for each line of COPY data), or from
someplace else (in which case it shouldn't). The former case still worked,
the latter not so much. The visible effect was that line numbers reported
for errors in a script file would be wrong if there were an earlier \copy
that was reading anything other than inline-in-the-script-file data.
To fix, introduce another pset field that holds the file do_copy wants the
COPY code to use. This is a little bit ugly, but less so than passing the
file down explicitly through several layers that aren't COPY-specific.
Extracted from a larger patch by Kumar Rajeev Rastogi; that patch also
changes printing of COPY command tags, which is not a bug fix and shouldn't
get back-patched. This particular idea was from a suggestion by Amit
Khandekar, if I'm reading the thread correctly.
Back-patch to 9.2 where the faulty code was introduced.
In order for this to work, walsenders need the optional ability to
connect to a database, so the "replication" keyword now allows true
or false, for backward-compatibility, and the new value "database"
(which causes the "dbname" parameter to be respected).
walsender needs to loop not only when idle but also when sending
decoded data to the user and when waiting for more xlog data to decode.
This means that there are now three separate loops inside walsender.c;
although some refactoring has been done here, this is still a bit ugly.
Andres Freund, with contributions from Álvaro Herrera, and further
review by me.
Return '4' and report a meaningful error message when a non-existent or
invalid data directory is passed. Previously, pg_ctl would just report
the server was not running.
Patch by me and Amit Kapila
Report from Peter Eisentraut
Instead of having read_post_opts() depend on the memory allocated for
the config file (which is now getting free'd), pg_strdup() for
post_opts and exec_path (similar to how it's being done elsewhere).
Noted by Thom Brown.
The new, small, free_readfile managed to have bug in it which could
cause it to try and free something it shouldn't, and fix the case
where it was being called with an invalid pointer leading to a
segfault.
Noted by Bruce, issues introduced and fixed by me.
This feature, building on previous commits, allows the write-ahead log
stream to be decoded into a series of logical changes; that is,
inserts, updates, and deletes and the transactions which contain them.
It is capable of handling decoding even across changes to the schema
of the effected tables. The output format is controlled by a
so-called "output plugin"; an example is included. To make use of
this in a real replication system, the output plugin will need to be
modified to produce output in the format appropriate to that system,
and to perform filtering.
Currently, information can be extracted from the logical decoding
system only via SQL; future commits will add the ability to stream
changes via walsender.
Andres Freund, with review and other contributions from many other
people, including Álvaro Herrera, Abhijit Menon-Sen, Peter Gheogegan,
Kevin Grittner, Robert Haas, Heikki Linnakangas, Fujii Masao, Abhijit
Menon-Sen, Michael Paquier, Simon Riggs, Craig Ringer, and Steve
Singer.
This option makes pg_dump, pg_dumpall and pg_restore inject an IF EXISTS
clause to each DROP command they emit. (In pg_dumpall, the clause is
not added to individual objects drops, but rather to the CREATE DATABASE
commands, as well as CREATE ROLE and CREATE TABLESPACE.)
This allows for a better user dump experience when using --clean in case
some objects do not already exist. Per bug #7873 by Dave Rolsky.
Author: Pavel Stěhule
Reviewed-by: Jeevan Chalke, Álvaro Herrera, Josh Kupershmidt
A number of issues were identified by the Coverity scanner and are
addressed in this patch. None of these appear to be security issues
and many are mostly cosmetic changes.
Short comments for each of the changes follows.
Correct the semi-colon placement in be-secure.c regarding SSL retries.
Remove a useless comparison-to-NULL in proc.c (value is dereferenced
prior to this check and therefore can't be NULL).
Add checking of chmod() return values to initdb.
Fix a couple minor memory leaks in initdb.
Fix memory leak in pg_ctl- involves free'ing the config file contents.
Use an int to capture fgetc() return instead of an enum in pg_dump.
Fix minor memory leaks in pg_dump.
(note minor change to convertOperatorReference()'s API)
Check fclose()/remove() return codes in psql.
Check fstat(), find_my_exec() return codes in psql.
Various ECPG memory leak fixes.
Check find_my_exec() return in ECPG.
Explicitly ignore pqFlush return in libpq error-path.
Change PQfnumber() to avoid doing an strdup() when no changes required.
Remove a few useless check-against-NULL's (value deref'd beforehand).
Check rmtree(), malloc() results in pg_regress.
Also check get_alternative_expectfile() return in pg_regress.
A new MAX_RATE option allows imposing a limit to the network transfer
rate from the server side. This is useful to limit the stress that
taking a base backup has on the server.
pg_basebackup is now able to specify a value to the server, too.
Author: Antonin Houska
Patch reviewed by Stefan Radomski, Andres Freund, Zoltán Böszörményi,
Fujii Masao, and Álvaro Herrera.
Tablespaces can be relocated in plain backup mode by specifying one or
more -T olddir=newdir options.
Author: Steeve Lennmark <steevel@handeldsbanken.se>
Reviewed-by: Peter Eisentraut <peter_e@gmx.net>
Coverity identified a number of places in which it couldn't prove that a
string being copied into a fixed-size buffer would fit. We believe that
most, perhaps all of these are in fact safe, or are copying data that is
coming from a trusted source so that any overrun is not really a security
issue. Nonetheless it seems prudent to forestall any risk by using
strlcpy() and similar functions.
Fixes by Peter Eisentraut and Jozef Mlich based on Coverity reports.
In addition, fix a potential null-pointer-dereference crash in
contrib/chkpass. The crypt(3) function is defined to return NULL on
failure, but chkpass.c didn't check for that before using the result.
The main practical case in which this could be an issue is if libc is
configured to refuse to execute unapproved hashing algorithms (e.g.,
"FIPS mode"). This ideally should've been a separate commit, but
since it touches code adjacent to one of the buffer overrun changes,
I included it in this commit to avoid last-minute merge issues.
This issue was reported by Honza Horak.
Security: CVE-2014-0065 for buffer overruns, CVE-2014-0066 for crypt()
We used to have externs for getopt() and its API variables scattered
all over the place. Now that we find we're going to need to tweak the
variable declarations for Cygwin, it seems like a good idea to have
just one place to tweak.
In this commit, the variables are declared "#ifndef HAVE_GETOPT_H".
That may or may not work everywhere, but we'll soon find out.
Andres Freund
Adjust handleCopyOut() to stop trying to write data once it's failed
one time. For typical cases such as out-of-disk-space or broken-pipe,
additional attempts aren't going to do anything but waste time, and
in any case clean truncation of the output seems like a better behavior
than randomly dropping blocks in the middle.
Also remove dubious (and misleadingly documented) attempt to force our way
out of COPY_OUT state if libpq didn't do that. If we did have a situation
like that, it'd be a bug in libpq and would be better fixed there, IMO.
We can hope that commit fa4440f516 took care
of any such problems, anyway.
Also fix longstanding bug in handleCopyIn(): PQputCopyEnd() only supports
a non-null errormsg parameter in protocol version 3, and will actively
fail if one is passed in version 2. This would've made our attempts
to get out of COPY_IN state after a failure into infinite loops when
talking to pre-7.4 servers.
Back-patch the COPY_OUT state change business back to 9.2 where it was
introduced, and the other two fixes into all supported branches.
If an error occurs in the foreground (backup) process of pg_basebackup,
and we exit in a controlled way, the background process (streaming
xlog process) would stay around and keep streaming.
This results in spurious empty lines in the server log. Instead, add
the newlines only when printing out the --echo output. In some cases,
this was already done, leading to two newlines being printed. Clean
that up as well.
From: Fabrízio de Royes Mello <fabriziomello@gmail.com>
Make ftello error-checking consistent to all calls and remove a
bit of ftello-related code which has been #if 0'd out since 2001.
Note that we are not concerned with the ftello() call under
snprintf() failing as it is just building a string to call
exit_horribly() with; printing -1 in such a case is fine.
Rather than reset errno (or just hope that its cleared already),
check just the result of the ftello for < 0 to determine if there
was an issue.
Oversight by me, pointed out by Tom.
This prevents pg_basebackup from generating excessive output when
dumping large clusters. The status is now updated once / second,
still making it possible to see that there is progress happening,
but limiting the total bandwidth.
Mika Eloranta, reviewed by Sawada Masahiko and Oskari Saarenmaa
When using verbose mode for pg_basebackup, in tar format sent to
stdout, we'd print an unitialized buffer as the filename.
Reported by Pontus Lundkvist
Improve pg_dump by checking results on various fgetc() calls which
previously were unchecked, ditto for ftello. Also clean up a couple
of very minor memory leaks by waiting to allocate structures until
after the initial check(s).
Issues spotted by Coverity.
Commit a5ff502fce was a brick shy of a load
in the backend lexer too, not just psql. Per further testing of bug #9068.
In passing, improve related comments.
Replication slots are a crash-safe data structure which can be created
on either a master or a standby to prevent premature removal of
write-ahead log segments needed by a standby, as well as (with
hot_standby_feedback=on) pruning of tuples whose removal would cause
replication conflicts. Slots have some advantages over existing
techniques, as explained in the documentation.
In a few places, we refer to the type of replication slots introduced
by this patch as "physical" slots, because forthcoming patches for
logical decoding will also have slots, but with somewhat different
properties.
Andres Freund and Robert Haas
Various places were supposing that errno could be expected to hold still
within an ereport() nest or similar contexts. This isn't true necessarily,
though in some cases it accidentally failed to fail depending on how the
compiler chanced to order the subexpressions. This class of thinko
explains recent reports of odd failures on clang-built versions, typically
missing or inappropriate HINT fields in messages.
Problem identified by Christian Kruse, who also submitted the patch this
commit is based on. (I fixed a few issues in his patch and found a couple
of additional places with the same disease.)
Back-patch as appropriate to all supported branches.
Move allocation to after we check the remote server version, to avoid
a possible, very minor, memory leak. This makes us more consistent
throughout as most places in pg_dump are done in the same way (due, in
part, to previous fixes like this).
Spotted by the Coverity scanner.
During parallel pg_dump, a worker process closing the connection caused
a minor memory leak (particularly minor as we are likely about to exit
anyway). Instead, free the memory in this case prior to returning NULL
to indicate connection closed.
Spotting by the Coverity scanner.
Back patch to 9.3 where this was introduced.
There was a bug in the psql's meta command \conninfo. When the
IP address was specified in the hostaddr and psql used it to create
a connection (i.e., psql -d "hostaddr=xxx"), \conninfo could not
display that address. This is because \conninfo got the connection
information only from PQhost() which could not return hostaddr.
This patch adds PQhostaddr(), and changes \conninfo so that it
can display not only the host name that PQhost() returns but also
the IP address which PQhostaddr() returns.
The bug has existed since 9.1 where \conninfo was introduced.
But it's too late to add new libpq function into the released versions,
so no backpatch.
krb5 has been deprecated since 8.3, and the recommended way to do
Kerberos authentication is using the GSSAPI authentication method
(which is still fully supported).
libpq retains the ability to identify krb5 authentication, but only
gives an error message about it being unsupported. Since all authentication
is initiated from the backend, there is no need to keep it at all
in the backend.
The psql Makefile was not creating $(datadir) before installing
psqlrc.sample there.
In most cases, the directory would be created in some other way, but for
the documented from-source client-only installation procedure, it could
fail.
Reported-by: Mike Blackwell <mike.blackwell@rrd.com>
The + modifier of \do didn't use to do anything, but now it adds an oprcode
column. This is useful both as an additional form of documentation of what
the operator does, and to save a step when finding out properties of the
underlying function.
Marko Tiikkaja, reviewed by Rushabh Lathia, adjusted a bit by me
Primarily, explain where to find the system-wide psqlrc file, per recent
gripe from John Sutton. Do some general wordsmithing and improve the
markup, too.
Also adjust psqlrc.sample so its comments about file location are somewhat
trustworthy. (Not sure why we bother with this file when it's empty,
but whatever.)
Back-patch to 9.2 where the startup file naming scheme was last changed.
Several previous commits have added columns to various \d queries without
updating their translate_columns[] arrays, leading to potentially incorrect
translations in NLS-enabled builds. Offenders include commit 893686762
(added prosecdef to \df+), c9ac00e6e (added description to \dc+) and
3b17efdfd (added description to \dC+). Fix those cases back to 9.3 or
9.2 as appropriate.
Since this is evidently more easily missed than one would like, in HEAD
also add an Assert that the supplied array is long enough. This requires
an API change for printQuery(), so it seems inappropriate for back
branches, but presumably all future changes will be tested in HEAD anyway.
In HEAD and 9.3, also clean up a whole lot of sloppiness in the emitted
SQL for \dy (event triggers): lack of translatability due to failing to
pass words-to-be-translated through gettext_noop(), inadequate schema
qualification, and sloppy formatting resulting in unnecessarily ugly
-E output.
Peter Eisentraut and Tom Lane, per bug #8702 from Sergey Burladyan
CREATE EVENT TRIGGER forgot to mark the event trigger as a member of its
extension, and pg_dump didn't pay any attention anyway when deciding
whether to dump the event trigger. Per report from Moshe Jacobson.
Given the obvious lack of testing here, it's rather astonishing that
ALTER EXTENSION ADD/DROP EVENT TRIGGER work, but they seem to.
There was an apparent attempt to limit the target database for
pg_restore to version 7.1.0 or later. Due to a leading zero this
was interpreted as an octal number, which allowed targets with
version numbers down to 2.87.36. The lowest actual release above
that was 6.0.0, so that was effectively the limit.
Since the success of the restore attempt will depend primarily on
on what statements were generated by the dump run, we don't want
pg_restore trying to guess whether a given target should be allowed
based on version number. Allow a connection to any version. Since
it is very unlikely that anyone would be using a recent version of
pg_restore to restore to a pre-6.0 database, this has little to no
practical impact, but it makes the code less confusing to read.
Issue reported and initial patch suggestion from Joel Jacobson
based on an article by Andrey Karpov reporting on issues found by
PVS-Studio static code analyzer. Final patch based on analysis by
Tom Lane. Back-patch to all supported branches.
This patch introduces generic support for ordered-set and hypothetical-set
aggregate functions, as well as implementations of the instances defined in
SQL:2008 (percentile_cont(), percentile_disc(), rank(), dense_rank(),
percent_rank(), cume_dist()). We also added mode() though it is not in the
spec, as well as versions of percentile_cont() and percentile_disc() that
can compute multiple percentile values in one pass over the data.
Unlike the original submission, this patch puts full control of the sorting
process in the hands of the aggregate's support functions. To allow the
support functions to find out how they're supposed to sort, a new API
function AggGetAggref() is added to nodeAgg.c. This allows retrieval of
the aggregate call's Aggref node, which may have other uses beyond the
immediate need. There is also support for ordered-set aggregates to
install cleanup callback functions, so that they can be sure that
infrastructure such as tuplesort objects gets cleaned up.
In passing, make some fixes in the recently-added support for variadic
aggregates, and make some editorial adjustments in the recent FILTER
additions for aggregates. Also, simplify use of IsBinaryCoercible() by
allowing it to succeed whenever the target type is ANY or ANYELEMENT.
It was inconsistent that it dealt with other polymorphic target types
but not these.
Atri Sharma and Andrew Gierth; reviewed by Pavel Stehule and Vik Fearing,
and rather heavily editorialized upon by Tom Lane
Previously, lookups of non-existent user names could return "Success";
it will now return "User does not exist" by resetting errno. This also
centralizes the user name lookup code in libpgport.
Report and analysis by Nicolas Marchildon; patch by me
WAL records of hint bit updates is useful to tools that want to examine
which pages have been modified. In particular, this is required to make
the pg_rewind tool safe (without checksums).
This can also be used to test how much extra WAL-logging would occur if
you enabled checksums, without actually enabling them (which you can't
currently do without re-initdb'ing).
Sawada Masahiko, docs by Samrat Revagade. Reviewed by Dilip Kumar, with
further changes by me.
When wal_level=logical, we'll log columns from the old tuple as
configured by the REPLICA IDENTITY facility added in commit
07cacba983. This makes it possible
a properly-configured logical replication solution to correctly
follow table updates even if they change the chosen key columns,
or, with REPLICA IDENTITY FULL, even if the table has no key at
all. Note that updates which do not modify the replica identity
column won't log anything extra, making the choice of a good key
(i.e. one that will rarely be changed) important to performance
when wal_level=logical is configured.
Each insert, update, or delete to a catalog table will also log
the CMIN and/or CMAX values of stamped by the current transaction.
This is necessary because logical decoding will require access to
historical snapshots of the catalog in order to decode some data
types, and the CMIN/CMAX values that we may need in order to judge
row visibility may have been overwritten by the time we need them.
Andres Freund, reviewed in various versions by myself, Heikki
Linnakangas, KONDO Mitsumasa, and many others.
pg_dumpall's charter is to be able to recreate a database cluster's
contents in a virgin installation, but it was failing to honor that
contract if the cluster had any ALTER DATABASE SET
default_transaction_read_only settings. By including a SET command
for the connection for each connection opened by pg_dumpall output,
errors are avoided and the source cluster is successfully
recreated.
There was discussion of whether to also set this for the connection
applying pg_dump output, but it was felt that it was both less
appropriate in that context, and far easier to work around.
Backpatch to all supported branches.
Ensure that the invocation command for postgres or pg_ctl runservice
double-quotes the executable's pathname; failure to do this leads to
trouble when the path contains spaces.
Also, ensure that the path ends in ".exe" in both cases and uses
backslashes rather than slashes as directory separators. The latter issue
is reported to confuse some third-party tools such as Symantec Backup Exec.
Also, rewrite the function to avoid buffer overrun issues by using a
PQExpBuffer instead of a fixed-size static buffer. Combinations of
very long executable pathnames and very long data directory pathnames
could have caused trouble before, for example.
Back-patch to all active branches, since this code has been like this
for a long while.
Naoya Anzai and Tom Lane, reviewed by Rajeev Rastogi
Previously, -d option for pg_isready was broken. When the name of the
database was specified by -d option, pg_isready failed with an error.
When the conninfo specified by -d option contained the setting of the
host name but not Numeric IP address (i.e., hostaddr), pg_isready
displayed wrong connection message. -d option could not handle a valid
URI prefix at all. This commit fixes these bugs of pg_isready.
Backpatch to 9.3, where pg_isready was introduced.
Per report from Josh Berkus and Robert Haas.
Original patch by Fabrízio de Royes Mello, heavily modified by me.
Formerly the planner had a hard-wired rule of thumb for guessing the amount
of space consumed by an aggregate function's transition state data. This
estimate is critical to deciding whether it's OK to use hash aggregation,
and in many situations the built-in estimate isn't very good. This patch
adds a column to pg_aggregate wherein a per-aggregate estimate can be
provided, overriding the planner's default, and infrastructure for setting
the column via CREATE AGGREGATE.
It may be that additional smarts will be required in future, perhaps even
a per-aggregate estimation function. But this is already a step forward.
This is extracted from a larger patch to improve the performance of numeric
and int8 aggregates. I (tgl) thought it was worth reviewing and committing
this infrastructure separately. In this commit, all built-in aggregates
are given aggtransspace = 0, so no behavior should change.
Hadi Moshayedi, reviewed by Pavel Stehule and Tomas Vondra
In --inserts and especially --column-inserts mode, we can get a useful
speedup by generating the common prefix of all a table's INSERT commands
just once, and then printing the prebuilt string for each row. This avoids
multiple invocations of fmtId() and other minor fooling around.
David Rowley
The previous coding was fairly unreadable and drew double-free warnings
from clang. I believe the double free was actually not reachable, because
PQconnectionNeedsPassword is coded to not return true if a password was
provided, so that the loop can't iterate more than twice. Nonetheless
it seems worth rewriting. No back-patch since this is just cosmetic.
pg_index.indisreplident had at one time in its development been called
indisidentity. describe.c got missed when it was renamed.
Bug introduced in commit 07cacba983.
Andres Freund
This is a similar fix as c6ec8793aa
9.2. This should never happen in 9.3 and newer since the special case
cannot happen there, but this patch synchronizes up the code so there
is no confusion on why they're different. An empty block is as harmless
in 9.3 as it was in 9.2, and can safely be ignored.
Pending patches for logical replication will use this to determine
which columns of a tuple ought to be considered as its candidate key.
Andres Freund, with minor, mostly cosmetic adjustments by me
The previous commit was intended to make psql show the full path name when
doing a \s (history save), but it was very badly implemented and would show
confusing if not outright wrong information in many situations; for
instance if the path name given to \s is absolute, or if \cd commands
involving relative paths have been issued. Consensus seems to be that
we don't especially need this functionality in \s, and certainly not in \s
alone. So revert rather than trying to fix it up. Per gripe from
Ian Barwick.
Although the bogus behavior exists in all supported versions, I'm not
back-patching, because the work created for translators (by change of
a translatable message) would probably outweigh the value of what is
after all a mostly-cosmetic change.
The parsing of WAL filenames of segments larger than > 255 was broken,
making pg_receivexlog unable to restart streaming after stopping it.
The bug was introduced by the changes in 9.3 to represent WAL segment number
as a 64-bit integer instead of two ints, log and seg. To fix, replace the
plain sscanf call with XLogFromFileName macro, which does the conversion
from log+seg to a 64-bit integer correcly.
Reported by Mika Eloranta.
This prevents the recently-added probe for shm_open() from crashing
on platforms that are impolite enough to deliver a signal rather than
returning ENOSYS for an unimplemented kernel call. At least on the
one known example (HPUX 10.20), ignoring SIGSYS does result in the
desired behavior of getting an ENOSYS error return instead.
Per discussion, we might later wish to do this in the backend as well,
but for now it seems sufficient to do it in initdb.
When we are using a C99-compliant vsnprintf implementation (which should be
most places, these days) it is worth the trouble to make use of its report
of how large the buffer needs to be to succeed. This patch adjusts
stringinfo.c and some miscellaneous usages in pg_dump to do that, relying
on the logic recently added in libpgcommon's psprintf.c. Since these
places want to know the number of bytes written once we succeed, modify the
API of pvsnprintf() to report that.
There remains near-duplicate logic in pqexpbuffer.c, but since that code
is in libpq, psprintf.c's approach of exit()-on-error isn't appropriate
for use there. Also note that I didn't bother touching the multitude
of places that call (v)snprintf without any attempt to provide a resizable
buffer.
Release-note-worthy incompatibility: the API of appendStringInfoVA()
changed. If there's any third-party code that's calling that directly,
it will need tweaking along the same lines as in this patch.
David Rowley and Tom Lane
Since an increasing number of views and foreign tables are now able
to be updated, complete with any table, view, or foreign table in
the relevant contexts. This avoids the need to use a complex
query that may be both confusing to end-users and nonperformant
to construct the list of possible completions.
Dean Rasheed, persuant to a complaint from Bernd Helme and a
suggestion from Peter Eisentraut
asprintf(), aside from not being particularly portable, has a fundamentally
badly-designed API; the psprintf() function that was added in passing in
the previous patch has a much better API choice. Moreover, the NetBSD
implementation that was borrowed for the previous patch doesn't work with
non-C99-compliant vsnprintf, which is something we still have to cope with
on some platforms; and it depends on va_copy which isn't all that portable
either. Get rid of that code in favor of an implementation similar to what
we've used for many years in stringinfo.c. Also, move it into libpgcommon
since it's not really libpgport material.
I think this patch will be enough to turn the buildfarm green again, but
there's still cosmetic work left to do, namely get rid of pg_asprintf()
in favor of using psprintf(). That will come in a followon patch.
Continuing 63f32f3416, libpgcommon should
depend on libpgport, but not vice versa. But wait_result_to_str() in
wait_error.c depends on pstrdup() in libpgcommon. So move exec.c and
wait_error.c from libpgport to libpgcommon. Also switch the link order
in the place that's actually used by the failing ecpg builds.
The function declarations have been left in port.h for now. That should
perhaps be separated sometime.
Now that msgfmt is run with -c by default, older versions of gettext are
complaining about the PO headers Last-Translator and Language-Team
still having their default values. Newer gettext versions fail to catch
this because of a bug (https://savannah.gnu.org/bugs/?40261), which is
why this hasn't been noticed before.
Copy updated versions of affected translation files from the
pgtranslations repository, were those files have been fixed.
Add asprintf(), pg_asprintf(), and psprintf() to simplify string
allocation and composition. Replacement implementations taken from
NetBSD.
Reviewed-by: Álvaro Herrera <alvherre@2ndquadrant.com>
Reviewed-by: Asif Naeem <anaeem.it@gmail.com>
If POSIX shared memory is supported and works, we prefer it.
Otherwise, we prefer System V, except on Windows, where we use
the implementation specific to that platform.
DISCARD ALL will now discard cached sequence information, as well.
Fabrízio de Royes Mello, reviewed by Zoltán Böszörményi, with some
further tweaks by me.
The cancel handler was uselessly set up even before the first connection
was opened. By setting it up afterwards, the user can use Ctrl+C to
abort psql if the initial connection attempt hangs.
Reviewed-by: Dean Rasheed <dean.a.rasheed@gmail.com>
Reviewed-by: Ryan Kelly <rpkelly22@gmail.com>
When a timeline history file is fetched from server, it is initially created
with a temporary file name, and renamed to place. However, the temporary
file name was constructed using an uninitialized buffer. Usually that meant
that the file was created in current directory instead of the target, which
usually goes unnoticed, but if the target is on a different filesystem than
the current dir, the rename() would fail. Fix that.
The second issue is that pg_receivexlog would not take .partial files into
account when determining when scanning the target directory for existing
WAL files. If the timeline has switched in the server several times in the
last WAL segment, and pg_receivexlog is restarted, it would choose a too
old starting point. That's not a problem as long as the old WAL segment
exists in the server and can be streamed over, but will cause a failure if
it's not.
Backpatch to 9.3, where this timeline handling code was written.
Analysed by Andrew Gierth, bug #8453, based on a bug report on IRC.
There's no inherent reason why an aggregate function can't be variadic
(even VARIADIC ANY) if its transition function can handle the case.
Indeed, this patch to add the feature touches none of the planner or
executor, and little of the parser; the main missing stuff was DDL and
pg_dump support.
It is true that variadic aggregates can create the same sort of ambiguity
about parameters versus ORDER BY keys that was complained of when we
(briefly) had both one- and two-argument forms of string_agg(). However,
the policy formed in response to that discussion only said that we'd not
create any built-in aggregates with varying numbers of arguments, not that
we shouldn't allow users to do it. So the logical extension of that is
we can allow users to make variadic aggregates as long as we're wary about
shipping any such in core.
In passing, this patch allows aggregate function arguments to be named, to
the extent of remembering the names in pg_proc and dumping them in pg_dump.
You can't yet call an aggregate using named-parameter notation. That seems
like a likely future extension, but it'll take some work, and it's not what
this patch is really about. Likewise, there's still some work needed to
make window functions handle VARIADIC fully, but I left that for another
day.
initdb forced because of new aggvariadic field in Aggref parse nodes.
We already did this for -t (--table) in 9.3, but missed the other similar
options. For consistency, allow all of them to be specified multiple times.
Unfortunately it's too late to sneak this into 9.3, so commit to master
only.
This keeps the usual trigger file name unchanged from 9.2, avoiding nasty
issues if you use a pre-9.3 pg_ctl binary with a 9.3 server or vice versa.
The fallback behavior of creating a full checkpoint before starting up is now
triggered by a file called "fallback_promote". That can be useful for
debugging purposes, but we don't expect any users to have to resort to that
and we might want to remove that in the future, which is why the fallback
mechanism is undocumented.
For simple views which are automatically updatable, this patch allows
the user to specify what level of checking should be done on records
being inserted or updated. For 'LOCAL CHECK', new tuples are validated
against the conditionals of the view they are being inserted into, while
for 'CASCADED CHECK' the new tuples are validated against the
conditionals for all views involved (from the top down).
This option is part of the SQL specification.
Dean Rasheed, reviewed by Pavel Stehule
This allows reads to continue without any blocking while a REFRESH
runs. The new data appears atomically as part of transaction
commit.
Review questioned the Assert that a matview was not a system
relation. This will be addressed separately.
Reviewed by Hitoshi Harada, Robert Haas, Andres Freund.
Merged after review with security patch f3ab5d4.
In pg_basebackup.c:reached_end_position(), we're reading from an
internal pipe with our own background process but we're possibly
reading more bytes than will actually fit into our buffer due to
an off-by-one error. As we're reading from an internal pipe
there's no real risk here, but it's good form to not depend on
such convenient arrangements.
Bug spotted by the Coverity scanner.
Back-patch to 9.2 where this showed up.
In pg_dump.c:getEventTriggers, check what major version we are on
before calling createPQExpBuffer() to avoid leaking that bit of
memory.
Leak discovered by the Coverity scanner.
Back-patch to 9.3 where support for dumping event triggers was
added.
When creating the symlink for the xlog directory, free the string
which stores the link location. Not really an issue but it doesn't
hurt to be good about this- prior cleanups have fixed similar
issues.
Leak found by the Coverity scanner.
Not back-patching as I don't see it being worth the code churn.
In receivelog.c:writeTimeLineHistoryFile(), we were not properly
closing the open'd file descriptor in error cases. While this
wouldn't matter much if we were about to exit due to such an
error, that's not the case with pg_receivexlog as it can be a
long-running process and these errors are non-fatal.
This resource leak was found by the Coverity scanner.
Back-patch to 9.3 where this issue first appeared.
In streamutil.c:GetConnection(), upgrade failure to parse the
connection string to an exit(1) instead of simply returning NULL.
Most callers already immediately exited, but pg_receivexlog would
loop on this case, continually trying to re-parse the connection
string (which can't be changed after pg_receivexlog has started).
GetConnection() was already expected to exit(1) in some cases
(eg: failure to allocate memory or if unable to determine the
integer_datetimes flag), so this change shouldn't surprise anyone.
Began looking at this due to the Coverity scanner complaining that
we were leaking err_msg in this case- no longer an issue since we
just exit(1) immediately.
The command strings read by the child processes during parallel
pg_dump, after being read and handled, were not being free'd.
This patch corrects this relatively minor memory leak.
Leak found by the Coverity scanner.
Back patch to 9.3 where parallel pg_dump was introduced.
In 9.3, there's no particular limit on the number of bgworkers;
instead, we just count up the number that are actually registered,
and use that to set MaxBackends. However, that approach causes
problems for Hot Standby, which needs both MaxBackends and the
size of the lock table to be the same on the standby as on the
master, yet it may not be desirable to run the same bgworkers in
both places. 9.3 handles that by failing to notice the problem,
which will probably work fine in nearly all cases anyway, but is
not theoretically sound.
A further problem with simply counting the number of registered
workers is that new workers can't be registered without a
postmaster restart. This is inconvenient for administrators,
since bouncing the postmaster causes an interruption of service.
Moreover, there are a number of applications for background
processes where, by necessity, the background process must be
started on the fly (e.g. parallel query). While this patch
doesn't actually make it possible to register new background
workers after startup time, it's a necessary prerequisite.
Patch by me. Review by Michael Paquier.
Treat TOAST index just the same as normal one and get the OID
of TOAST index from pg_index but not pg_class.reltoastidxid.
This change allows us to handle multiple TOAST indexes, and
which is required infrastructure for upcoming
REINDEX CONCURRENTLY feature.
Patch by Michael Paquier, reviewed by Andres Freund and me.
SnapshotNow scans have the undesirable property that, in the face of
concurrent updates, the scan can fail to see either the old or the new
versions of the row. In many cases, we work around this by requiring
DDL operations to hold AccessExclusiveLock on the object being
modified; in some cases, the existing locking is inadequate and random
failures occur as a result. This commit doesn't change anything
related to locking, but will hopefully pave the way to allowing lock
strength reductions in the future.
The major issue has held us back from making this change in the past
is that taking an MVCC snapshot is significantly more expensive than
using a static special snapshot such as SnapshotNow. However, testing
of various worst-case scenarios reveals that this problem is not
severe except under fairly extreme workloads. To mitigate those
problems, we avoid retaking the MVCC snapshot for each new scan;
instead, we take a new snapshot only when invalidation messages have
been processed. The catcache machinery already requires that
invalidation messages be sent before releasing the related heavyweight
lock; else other backends might rely on locally-cached data rather
than scanning the catalog at all. Thus, making snapshot reuse
dependent on the same guarantees shouldn't break anything that wasn't
already subtly broken.
Patch by me. Review by Michael Paquier and Andres Freund.
When there's a comment on an index that was created with UNIQUE or PRIMARY
KEY constraint syntax, we need to label the comment as depending on the
constraint not the index, since only the constraint object actually appears
in the dump. This incorrect dependency can lead to parallel pg_restore
trying to restore the comment before the index has been created, per bug
#8257 from Lloyd Albin.
This patch fixes pg_dump to produce the right dependency in dumps made
in the future. Usually we also try to hack pg_restore to work around
bogus dependencies, so that existing (wrong) dumps can still be restored in
parallel mode; but that doesn't seem practical here since there's no easy
way to relate the constraint dump entry to the comment after the fact.
Andres Freund
In binary upgrade mode, we need to recreate and then drop dropped
columns so that all the columns get the right attribute number. This is
true for foreign tables as well as for native tables. For foreign
tables we have been getting the first part right but not the second,
leading to bogus columns in the upgraded database. Fix this all the way
back to 9.1, where foreign tables were introduced.
Tom Lane
Noah Misch
Fujii Masao
Andres Freund
Heikki Linnakangas
Peter Eisentraut
Simon Riggs
Bruce Momjian
Greg Stark
Robert Haas
Stephen Frost
Alvaro Herrera
Magnus Hagander
Andrew Dunstan
Kevin Grittner
Tatsuo Ishii