Commit graph

4960 commits

Author SHA1 Message Date
Robert Haas
84be67181a pg_dumpall: Add a -E flag to set the encoding, like pg_dump has.
Michael Paquier, reviewed by Fabien Coelho

Discussion: http://postgr.es/m/CAB7nPqQcYWmrm2n-dVaMUhYPKFU_DxQwPuUGuC4ZF+8B=dS5xQ@mail.gmail.com
2017-09-01 12:24:20 -04:00
Peter Eisentraut
2073c641b4 pg_test_timing: Some NLS fixes
The string "% of total" was marked by xgettext to be a c-format, but it
is actually not, so mark up the source to prevent that.

Compute the column widths of the final display dynamically based on the
translated strings, so that translations don't mess up the display
accidentally.
2017-08-26 09:25:19 -04:00
Peter Eisentraut
99ce446ada pg_upgrade: Remove more dead code
related to 6ce6a61840

Reported-by: Christoph Berg <myon@debian.org>
2017-08-25 12:02:29 -04:00
Peter Eisentraut
e86ac70d6e Message translatability fixes 2017-08-25 11:52:31 -04:00
Stephen Frost
0cdc3e47be psql: Fix \gx when FETCH_COUNT is used
Set expanded output when requested through \gx in ExecQueryUsingCursor()
(used when FETCH_COUNT is set).

Discussion: https://www.postgresql.org/message-id/CB7A53AA-5645-4BDD-AB07-4D22CD9D8FF1%40gmx.net
Author: Tobias Bussmann
2017-08-24 16:20:50 -04:00
Peter Eisentraut
6ce6a61840 pg_upgrade: Remove dead code
Remove code meant for upgrading to a particular version of PostgreSQL
9.0.  Since pg_upgrade only supports upgrading to the current major
version, this code is no longer useful.
2017-08-24 15:29:35 -04:00
Peter Eisentraut
7e046e6e8a pg_upgrade: Message translatability and style fixes 2017-08-22 20:32:17 -04:00
Tom Lane
b1c2d76a2f Fix possible core dump in parallel restore when using a TOC list.
Commit 3eb9a5e7c unintentionally introduced an ordering dependency
into restore_toc_entries_prefork().  The existing coding of
reduce_dependencies() contains a check to skip moving a TOC entry
to the ready_list if it wasn't initially in the pending_list.
This used to suffice to prevent reduce_dependencies() from trying to
move anything into the ready_list during restore_toc_entries_prefork(),
because the pending_list stayed empty throughout that phase; but it no
longer does.  The problem doesn't manifest unless the TOC has been
reordered by SortTocFromFile, which is how I missed it in testing.

To fix, just add a test for ready_list == NULL, converting the call
with NULL from a poor man's sanity check into an explicit command
not to touch TOC items' list membership.  Clarify some of the comments
around this; in particular, note the primary purpose of the check for
pending_list membership, which is to ensure that we can't try to restore
the same item twice, in case a TOC list forces it to be restored before
its dependency count goes to zero.

Per report from Fabrízio de Royes Mello.  Back-patch to 9.3, like the
previous commit.

Discussion: https://postgr.es/m/CAFcNs+pjuv0JL_x4+=71TPUPjdLHOXA4YfT32myj_OrrZb4ohA@mail.gmail.com
2017-08-19 13:39:51 -04:00
Peter Eisentraut
cf851519d4 pg_dump: Support using synchronized snapshots on standbys
This became possible by commit
6c2003f8a1.  This just makes pg_dump aware
of it and updates the documentation.

Author: Petr Jelinek <petr.jelinek@2ndquadrant.com>
2017-08-16 19:46:50 -04:00
Peter Eisentraut
77d05706be Fix up some misusage of appendStringInfo() and friends
Change to appendStringInfoChar() or appendStringInfoString() where those
can be used.

Author: David Rowley <david.rowley@2ndquadrant.com>
Reviewed-by: Ashutosh Bapat <ashutosh.bapat@enterprisedb.com>
2017-08-15 23:34:39 -04:00
Peter Eisentraut
514731af58 pg_receivewal: Improve verbose mode
Some informational messages showed up even if verbose mode was not
used.  Move them to verbose mode.

Author: Michael Paquier <michael.paquier@gmail.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
2017-08-15 20:25:37 -04:00
Peter Eisentraut
0f0ee68e94 psql: Add tab completion for \pset pager
Author: Pavel Stehule <pavel.stehule@gmail.com>
2017-08-15 19:12:29 -04:00
Robert Haas
23d7680d04 pg_dump: Add a --load-via-partition-root option.
Rushabh Lathia, reviewed and somewhat revised by me.  Testing by
Rajkumar Raghuwanshi.

Discussion: http://postgr.es/m/CAGPqQf0C1he087bz9xRBOGZBuESYz9X=Fp8Ca_g+TfHgAff75g@mail.gmail.com
2017-08-14 22:54:41 -04:00
Tom Lane
21d304dfed Final pgindent + perltidy run for v10. 2017-08-14 17:29:33 -04:00
Peter Eisentraut
d4ede668d6 pg_upgrade: Clarify one message
Reported-by: Dennis Björklund <db@zigo.dhs.org>
2017-08-11 15:44:10 -04:00
Tom Lane
7968184429 Remove pgbench's restriction on placement of -M switch.
Previously the -M switch had to appear before any switch that directly
or indirectly specified a benchmarking script.  This was both confusing
and inadequately documented, as per gripe from Tatsuo Ishii.  We can
remove the restriction at the cost of making an extra pass over the
lists of SQL commands, which seems like a cheap price (the string scans
themselves likely cost much more).  The change is just to not extract
parameters from the SQL commands until we have finished parsing the
switches and know the final value of -M.

Per discussion, we'll treat this as a low-grade bug fix and sneak it
into v10, rather than holding it for v11.

Tom Lane, reviewed by Tatsuo Ishii and Fabien Coelho

Discussion: https://postgr.es/m/20170802.110328.1963639094551443169.t-ishii@sraoss.co.jp
Discussion: https://postgr.es/m/10208.1502465077@sss.pgh.pa.us
2017-08-11 15:19:40 -04:00
Peter Eisentraut
a1ef920e27 Remove uses of "slave" in replication contexts
This affects mostly code comments, some documentation, and tests.
Official APIs already used "standby".
2017-08-10 22:55:41 -04:00
Peter Eisentraut
f7668b2b35 Translation updates
Source-Git-URL: git://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash: 1a0b5e655d7871506c2b1c7ba562c2de6b6a55de
2017-08-07 13:55:34 -04:00
Peter Eisentraut
26d40ada3f Message style improvements 2017-08-04 18:31:32 -04:00
Tom Lane
3eb9a5e7c4 Fix pg_dump/pg_restore to emit REFRESH MATERIALIZED VIEW commands last.
Because we push all ACL (i.e. GRANT/REVOKE) restore steps to the end,
materialized view refreshes were occurring while the permissions on
referenced objects were still at defaults.  This led to failures if,
say, an MV owned by user A reads from a table owned by user B, even
if B had granted the necessary privileges to A.  We've had multiple
complaints about that type of restore failure, most recently from
Jordan Gigov.

The ideal fix for this would be to start treating ACLs as dependency-
sortable objects, rather than hard-wiring anything about their dump order
(the existing approach is a messy kluge dating to commit dc0e76ca3).
But that's going to be a rather major change, and it certainly wouldn't
lead to a back-patchable fix.  As a short-term solution, convert the
existing two-pass hack (ie, normal objects then ACLs) to a three-pass hack,
ie, normal objects then ACLs then matview refreshes.  Because this happens
in RestoreArchive(), it will also fix the problem when restoring from an
existing archive-format dump.

(Note this means that if a matview refresh would have failed under the
permissions prevailing at dump time, it'll fail during restore as well.
We'll define that as user error rather than something we should try
to work around.)

To avoid performance loss in parallel restore, we need the matview
refreshes to still be parallelizable.  Hence, clean things up enough
so that both ACLs and matviews are handled by the parallel restore
infrastructure, instead of reverting back to serial restore for ACLs.
There is still a final serial step, but it shouldn't normally have to
do anything; it's only there to try to recover if we get stuck due to
some problem like unresolved circular dependencies.

Patch by me, but it owes something to an earlier attempt by Kevin Grittner.
Back-patch to 9.3 where materialized views were introduced.

Discussion: https://postgr.es/m/28572.1500912583@sss.pgh.pa.us
2017-08-03 17:36:39 -04:00
Alvaro Herrera
9a3b5d3ad0 Fix build on zlib-less environments
Commit 4d57e83816 added support for getting I/O errors out of zlib,
but it introduced a portability problem for systems without zlib.
Repair by wrapping the zlib call inside #ifdef and restore the original
code in the other branch.

This serves to illustrate the inadequacy of the zlib abstraction in
pg_backup_archiver: there is no way to call gzerror() in that
abstraction.  This means that the several places that call GZREAD and
GZWRITE are currently doing error reporting wrongly, but ENOTIME to get
it fixed before next week's release set.

Backpatch to 9.4, like the commit that introduced the problem.
2017-08-03 14:54:28 -04:00
Peter Eisentraut
5ff3d73813 Add new files to nls.mk and add translation markers 2017-08-02 22:45:48 -04:00
Alvaro Herrera
4d57e83816 Fix pg_dump's errno checking for zlib I/O
Some error reports were reporting strerror(errno), which for some error
conditions coming from zlib are wrong, resulting in confusing reports
such as
  pg_restore: [compress_io] could not read from input file: Success
which makes no sense.  To correctly extract the error message we need to
use gzerror(), so let's do that.

This isn't as comprehensive or as neat as I would like, but at least it
should improve things in many common cases.  The zlib abstraction in
compress_io does not seem to be applied consistently enough; we could
perhaps improve that, but it seems master-only material, not a bug fix
for back-patching.

This problem goes back all the way, but I decided to apply back to 9.4
only, because older branches don't contain commit 14ea89366 which this
change depends on.

Authors: Vladimir Kunschikov, Álvaro Herrera
Discussion: https://postgr.es/m/1498120508308.9826@infotecs.ru
2017-08-02 18:26:59 -04:00
Peter Eisentraut
0b02e3f128 Fix typo
Author: Masahiko Sawada <sawada.mshk@gmail.com>
2017-07-31 17:22:47 -04:00
Stephen Frost
d2a51e3efc Fix function comment for dumpACL()
The comment for dumpACL() got neglected when initacls and initracls were
added and the discussion of what 'racls' is wasn't very clear either.

Per complaint from Tom.
2017-07-31 10:37:08 -04:00
Tom Lane
9dea962b3e Include publication owner's name in the output of \dRp+.
Without this, \dRp prints information that \dRp+ does not, which
seems pretty odd.

Daniel Gustafsson

Discussion: https://postgr.es/m/3641F19B-336A-431A-86CE-A80562505C5E@yesql.se
2017-07-28 17:44:48 -04:00
Tom Lane
8d304072a2 Fix psql tab completion for CREATE USER MAPPING.
After typing CREATE USER M..., it would not fill in MAPPING FOR,
even though that was clearly intended behavior.

Jeff Janes

Discussion: https://postgr.es/m/CAMkU=1wo2iQ6jWnN=egqOb5NxEPn0PpANEtKHr3uPooQ+nYPtw@mail.gmail.com
2017-07-27 14:13:15 -04:00
Tom Lane
77cb4a1d67 Standardize describe.c's behavior for no-matching-objects a bit more.
Most functions in this file are content to print an empty table if there
are no matching objects.  In some, the behavior is to loop over all
matching objects and print a table for each one; therefore, without any
extra logic, nothing at all would be printed if no objects match.
We accept that outcome in QUIET mode, but in normal mode it seems better
to print a helpful message.  The new \dRp+ command had not gotten that
memo; fix it.

listDbRoleSettings() is out of step on this, but I think it's better for
it to print a custom message rather than an empty table, because of the
possibility that the user is confused about what the pattern arguments mean
or which is which.  The original message wording was entirely useless for
clarifying that, though, not to mention being unlike the wordings used
elsewhere.  Improve the text, and also print the messages with psql_error
as is the general custom here.

listTables() is also out in left field, but since it's such a heavily
used function, I'm hesitant to change its behavior so much as to print
an empty table rather than a custom message.  People are probably used
to getting a message.  But we can make the wording more standardized and
helpful, and print it with psql_error rather than printing to stdout.

In both listDbRoleSettings and listTables, we play dumb and emit an
empty table, not a custom message, in QUIET mode.  That was true before
and I see no need to change it.

Several of the places printing such messages risked dumping core if
no pattern string had been provided; make them more wary.  (This case
is presently unreachable in describeTableDetails; but it shouldn't be
assuming that command.c will never pass it a null.  The text search
functions would only reach the case if a database contained no text
search objects, which is also currently impossible since we pin the
built-in objects, but again it seems unwise to assume that here.)

Daniel Gustafsson, tweaked a bit by me

Discussion: https://postgr.es/m/3641F19B-336A-431A-86CE-A80562505C5E@yesql.se
2017-07-27 13:30:59 -04:00
Tom Lane
1e2f941db1 Avoid use of sprintf/snprintf in describe.c.
Most places were already using the PQExpBuffer library for constructing
variable-length strings; bring the two stragglers into line.
describeOneTSParser was living particularly dangerously since it wasn't
even using snprintf().

Daniel Gustafsson

Discussion: https://postgr.es/m/3641F19B-336A-431A-86CE-A80562505C5E@yesql.se
2017-07-27 12:12:37 -04:00
Tom Lane
b884f629dc Sync listDbRoleSettings() with the rest of the world.
listDbRoleSettings() handled its server version check randomly differently
from every other comparable function in describe.c, not only as to code
layout but also message wording.  It also leaked memory, because its
PQExpBuffer management was also unlike everyplace else (and wrong).

Also fix an error-case leak in add_tablespace_footer().

In passing, standardize the format of function header comments in
describe.c --- we usually put "/*" alone on a line.

Daniel Gustafsson, memory leak fixes by me

Discussion: https://postgr.es/m/3641F19B-336A-431A-86CE-A80562505C5E@yesql.se
2017-07-27 11:57:29 -04:00
Tom Lane
dc4da3dc84 Fix very minor memory leaks in psql's command.c.
\drds leaked its second pattern argument if any, and \connect leaked
any empty-string or "-" arguments.  These are old bugs, but it's hard
to imagine any real use-case where the leaks could amount to anything
meaningful, so not bothering with a back-patch.

Daniel Gustafsson and Tom Lane

Discussion: https://postgr.es/m/3641F19B-336A-431A-86CE-A80562505C5E@yesql.se
2017-07-27 11:10:38 -04:00
Andrew Dunstan
efd7f8e365 Work around Msys weakness in Testlib.pm's command_like()
When output of IPC::Run::run () is redirected to scalar references, in
certain circumstances the Msys perl does not correctly detect that the
end of file has been seen, making the test hang indefinitely. One such
circumstance is when the command is 'pg_ctl start', and such a change
was made in commit f13ea95f9e. The workaround, which only applies on
MSys, is to redirect the output to temporary files and then read them in
when the process has finished.

Patch by me, reviewed and tweaked by Tom Lane.
2017-07-26 22:46:55 -04:00
Tom Lane
50d2426f5a Clean up SQL emitted by psql/describe.c.
Fix assorted places that had not bothered with the convention of
prefixing catalog and function names with "pg_catalog.".  That
could possibly result in query failure when running with a nondefault
search_path.  Also fix two places that weren't quoting OID literals.
I think the latter hasn't mattered much since about 7.3, but it's still
a bad idea to be doing it in 99 places and not in 2 others.

Also remove a useless EXISTS sub-select that someone had stuck into
describeOneTableDetails' queries for child tables.  We just got the OID
out of pg_class, so I hardly see how checking that it exists in pg_class
was doing anything helpful.

In passing, try to improve the emitted formatting of a couple of
these queries, though I didn't work really hard on that.  And merge
unnecessarily duplicative coding in some other places.

Much of this was new in HEAD, but some was quite old; back-patch
as appropriate.
2017-07-26 19:35:57 -04:00
Tom Lane
93f039b494 Fix pg_dump's handling of event triggers.
pg_dump with the --clean option failed to emit DROP EVENT TRIGGER
commands for event triggers.  In a closely related oversight,
it also did not emit ALTER OWNER commands for event triggers.
Since only superusers can create event triggers, the latter oversight
is of little practical consequence ... but if we're going to record
an owner for event triggers, then surely pg_dump should preserve it.

Per complaint from Greg Atkins.  Back-patch to 9.3 where event triggers
were introduced.

Discussion: https://postgr.es/m/20170722191142.yi4e7tzcg3iacclg@gmail.com
2017-07-22 20:20:09 -04:00
Robert Haas
a46fe6e8be pg_rewind: Fix some problems when copying files >2GB.
When incrementally updating a file larger than 2GB, the old code could
either fail outright (if the client asked the server for bytes beyond
the 2GB boundary) or fail to copy all the blocks that had actually
been modified (if the server reported a file size to the client in
excess of 2GB), resulting in data corruption.  Generally, such files
won't occur anyway, but they might if using a non-default segment size
or if there the directory contains stray files unrelated to
PostgreSQL.  Fix by a more prudent choice of data types.

Even with these improvements, this code still uses a mix of different
types (off_t, size_t, uint64, int64) to represent file sizes and
offsets, not all of which necessarily have the same width or
signedness, so further cleanup might be in order here.  However, at
least now they all have the potential to be 64 bits wide on 64-bit
platforms.

Kuntal Ghosh and Michael Paquier, with a tweak by me.

Discussion: http://postgr.es/m/CAGz5QC+8gbkz=Brp0TgoKNqHWTzonbPtPex80U0O6Uh_bevbaA@mail.gmail.com
2017-07-21 14:25:36 -04:00
Robert Haas
063ff9210c pg_rewind: Fix busted sanity check.
As written, the code would only fail the sanity check if none of the
columns returned by the server were of the expected type, but we want
it to fail if even one column is not of the expected type.

Discussion: http://postgr.es/m/CA+TgmoYuY5zW7JEs+1hSS1D=V5K8h1SQuESrq=bMNeo0B71Sfw@mail.gmail.com
2017-07-21 12:59:22 -04:00
Tom Lane
3cb29c42f9 Add static assertions about pg_control fitting into one disk sector.
When pg_control was first designed, sizeof(ControlFileData) was small
enough that a comment seemed like plenty to document the assumption that
it'd fit into one disk sector.  Now it's nearly 300 bytes, raising the
possibility that somebody would carelessly add enough stuff to create
a problem.  Let's add a StaticAssertStmt() to ensure that the situation
doesn't pass unnoticed if it ever occurs.

While at it, rename PG_CONTROL_SIZE to PG_CONTROL_FILE_SIZE to make it
clearer what that symbol means, and convert the existing runtime
comparisons of sizeof(ControlFileData) vs. PG_CONTROL_FILE_SIZE to be
static asserts --- we didn't have that technology when this code was
first written.

Discussion: https://postgr.es/m/9192.1500490591@sss.pgh.pa.us
2017-07-19 16:16:57 -04:00
Alvaro Herrera
837255cc81 pg_upgrade i18n: Fix "%s server/cluster" wording
The original wording was impossible to translate correctly.

Discussion: https://postgr.es/m/20170523002827.lzc2jkzh2gubclqb@alvherre.pgsql
2017-07-14 19:21:34 -04:00
Tom Lane
c95275fc20 Fix broken link-command-line ordering for libpgfeutils.
In the frontend Makefiles that pull in libpgfeutils, we'd generally
done it like this:

LDFLAGS += -L$(top_builddir)/src/fe_utils -lpgfeutils $(libpq_pgport)

That method is badly broken, as seen in bug #14742 from Chris Ruprecht.
The -L flag for src/fe_utils ends up being placed after whatever random
-L flags are in LDFLAGS already.  That puts us at risk of pulling in
libpgfeutils.a from some previous installation rather than the freshly
built one in src/fe_utils.  Also, the lack of an "override" is hazardous
if someone tries to specify some LDFLAGS on the make command line.

The correct way to do it is like this:

override LDFLAGS := -L$(top_builddir)/src/fe_utils -lpgfeutils $(libpq_pgport) $(LDFLAGS)

so that libpgfeutils, along with libpq, libpgport, and libpgcommon, are
guaranteed to be pulled in from the build tree and not from any referenced
system directory, because their -L flags will appear first.

In some places we'd been even lazier and done it like this:

LDFLAGS += -L$(top_builddir)/src/fe_utils -lpgfeutils -lpq

which is subtly wrong in an additional way: on platforms where we can't
restrict the symbols exported by libpq.so, it allows libpgfeutils to
latch onto libpgport and libpgcommon symbols from libpq.so, rather than
directly from those static libraries as intended.  This carries hazards
like those explained in the comments for the libpq_pgport macro.

In addition to fixing the broken libpgfeutils usages, I tried to
standardize on using $(libpq_pgport) like so:

override LDFLAGS := $(libpq_pgport) $(LDFLAGS)

even where libpgfeutils is not in the picture.  This makes no difference
right now but will hopefully discourage future mistakes of the same ilk.
And it's more like the way we handle CPPFLAGS in libpq-using Makefiles.

In passing, just for consistency, make pgbench include PTHREAD_LIBS the
same way everyplace else does, ie just after LIBS rather than in some
random place in the command line.  This might have practical effect if
there are -L switches in that macro on some platform.

It looks to me like the MSVC build scripts are not affected by this
error, but someone more familiar with them than I might want to double
check.

Back-patch to 9.6 where libpgfeutils was introduced.  In 9.6, the hazard
this error creates is that a reinstallation might link to the prior
installation's copy of libpgfeutils.a and thereby fail to absorb a
minor-version bug fix.

Discussion: https://postgr.es/m/20170714125106.9231.13772@wrigleys.postgresql.org
2017-07-14 12:26:53 -04:00
Heikki Linnakangas
8046465c2e Fix pg_basebackup output to stdout on Windows.
When writing a backup to stdout with pg_basebackup on Windows, put stdout
to binary mode. Any CR bytes in the output will otherwise be output
incorrectly as CR+LF.

In the passing, standardize on using "_setmode" instead of "setmode", for
the sake of consistency. They both do the same thing, but according to
MSDN documentation, setmode is deprecated.

Fixes bug #14634, reported by Henry Boehlert. Patch by Haribabu Kommi.
Backpatch to all supported versions.

Discussion: https://www.postgresql.org/message-id/20170428082818.24366.13134@wrigleys.postgresql.org
2017-07-14 16:02:53 +03:00
Heikki Linnakangas
09ed6c7e67 Remove unnecessary braces, to match the surrounding style.
Mostly in the new subscription-related commands. Backport the few that
were also present in older versions.

Thomas Munro

Discussion: https://www.postgresql.org/message-id/CAEepm=3CyW1QmXcXJXmqiJXtXzFDc8SvSfnxkEGD3Bkv2SrkeQ@mail.gmail.com
2017-07-12 12:30:50 +03:00
Alvaro Herrera
6c774caf0e Translation updates
Source-Git-URL: git://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash: c5a8de3653bb1af6b0eb41cc6bf090c5522df52b
2017-07-10 11:53:55 -04:00
Magnus Hagander
4808d69955 Fix out of date comment
Author: Masahiko Sawada <sawada.mshk@gmail.com>
2017-07-07 15:08:55 +03:00
Tom Lane
ff68e909ac Restore linking libpq into pg_ctl on Mingw builds.
Commit 1ae853654 missed this.  Per Andrew Dunstan.
2017-07-05 15:23:22 -04:00
Peter Eisentraut
1bac5f552a pg_ctl: Make failure to complete operation a nonzero exit
If an operation being waited for does not complete within the timeout,
then exit with a nonzero exit status.  This was previously handled
inconsistently.
2017-07-05 13:37:08 -04:00
Peter Eisentraut
5191e357cf psql documentation fixes
Update the documentation for \pset to mention
columns|linestyle|pager_min_lines.  Add various mentions of \pset
command equivalences that were previously inconsistent.

Author: Дилян Палаузов <dpa-postgres@aegee.org>
2017-07-04 21:10:08 -04:00
Peter Eisentraut
4260c05c6d Update code comments for pg_xlog -> pg_wal
Author: Michael Paquier <michael.paquier@gmail.com>
2017-06-30 14:40:50 -04:00
Tom Lane
1ae8536545 Ooops, WIN32 code in pg_ctl.c still needs PQExpBuffer.
Per buildfarm.
2017-06-28 18:00:16 -04:00
Tom Lane
f13ea95f9e Change pg_ctl to detect server-ready by watching status in postmaster.pid.
Traditionally, "pg_ctl start -w" has waited for the server to become
ready to accept connections by attempting a connection once per second.
That has the major problem that connection issues (for instance, a
kernel packet filter blocking traffic) can't be reliably told apart
from server startup issues, and the minor problem that if server startup
isn't quick, we accumulate "the database system is starting up" spam
in the server log.  We've hacked around many of the possible connection
issues, but it resulted in ugly and complicated code in pg_ctl.c.

In commit c61559ec3, I changed the probe rate to every tenth of a second.
That prompted Jeff Janes to complain that the log-spam problem had become
much worse.  In the ensuing discussion, Andres Freund pointed out that
we could dispense with connection attempts altogether if the postmaster
were changed to report its status in postmaster.pid, which "pg_ctl start"
already relies on being able to read.  This patch implements that, teaching
postmaster.c to report a status string into the pidfile at the same
state-change points already identified as being of interest for systemd
status reporting (cf commit 7d17e683f).  pg_ctl no longer needs to link
with libpq at all; all its functions now depend on reading server files.

In support of this, teach AddToDataDirLockFile() to allow addition of
postmaster.pid lines in not-necessarily-sequential order.  This is needed
on Windows where the SHMEM_KEY line will never be written at all.  We still
have the restriction that we don't want to truncate the pidfile; document
the reasons for that a bit better.

Also, fix the pg_ctl TAP tests so they'll notice if "start -w" mode
is broken --- before, they'd just wait out the sixty seconds until
the loop gives up, and then report success anyway.  (Yes, I found that
out the hard way.)

While at it, arrange for pg_ctl to not need to #include miscadmin.h;
as a rather low-level backend header, requiring that to be compilable
client-side is pretty dubious.  This requires moving the #define's
associated with the pidfile into a new header file, and moving
PG_BACKEND_VERSIONSTR someplace else.  For lack of a clearly better
"someplace else", I put it into port.h, beside the declaration of
find_other_exec(), since most users of that macro are passing the value to
find_other_exec().  (initdb still depends on miscadmin.h, but at least
pg_ctl and pg_upgrade no longer do.)

In passing, fix main.c so that PG_BACKEND_VERSIONSTR actually defines the
output of "postgres -V", which remarkably it had never done before.

Discussion: https://postgr.es/m/CAMkU=1xJW8e+CTotojOMBd-yzUvD0e_JZu2xHo=MnuZ4__m7Pg@mail.gmail.com
2017-06-28 17:31:32 -04:00
Stephen Frost
4500edc7e9 Do not require 'public' to exist for pg_dump -c
Commit 330b84d8c4 didn't contemplate the case where the public schema
has been dropped and introduced a query which fails when there is no
public schema into pg_dump (when used with -c).

Adjust the query used by pg_dump to handle the case where the public
schema doesn't exist and add tests to check that such a case no longer
fails.

Back-patch the specific fix to 9.6, as the prior commit was.

Adding tests for this case involved adding support to the pg_dump
TAP tests to work with multiple databases, which, while not a large
change, is a bit much to back-patch, so that's only done in master.

Addresses bug #14650
Discussion: https://www.postgresql.org/message-id/20170512181801.1795.47483%40wrigleys.postgresql.org
2017-06-28 10:33:57 -04:00