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Patch contributed by Amit Kapila. Reviewed by Hari Babu, Masao Fujii,
Boszormenyi Zoltan, Andres Freund, Greg Smith and others.
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This fixes a problem noted as a followup to bug #8648: if a query has a
semantically-empty target list, e.g. SELECT * FROM zero_column_table,
ruleutils.c will dump it as a syntactically-empty target list, which was
not allowed. There doesn't seem to be any reliable way to fix this by
hacking ruleutils (note in particular that the originally zero-column table
might since have had columns added to it); and even if we had such a fix,
it would do nothing for existing dump files that might contain bad syntax.
The best bet seems to be to relax the syntactic restriction.
Also, add parse-analysis errors for SELECT DISTINCT with no columns (after
*-expansion) and RETURNING with no columns. These cases previously
produced unexpected behavior because the parsed Query looked like it had
no DISTINCT or RETURNING clause, respectively. If anyone ever offers
a plausible use-case for this, we could work a bit harder on making the
situation distinguishable.
Arguably this is a bug fix that should be back-patched, but I'm worried
that there may be client apps or PLs that expect "SELECT ;" to throw a
syntax error. The issue doesn't seem important enough to risk changing
behavior in minor releases.
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Plus one instance of "to to" in the docs.
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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.
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Erik Rijkers
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This can be used to mark custom built binaries with an extra version
string such as a git describe identifier or distribution package release
version.
From: Oskari Saarenmaa <os@ohmu.fi>
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Pointed out by Gianni Ciolli.
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Per request from Kevin Grittner.
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If autovacuum_work_mem is set, autovacuum workers now use
this parameter in preference to maintenance_work_mem.
Peter Geoghegan
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Set min_recovery_apply_delay to force a delay in recovery apply for commit and
restore point WAL records. Other records are replayed immediately. Delay is
measured between WAL record time and local standby time.
Robert Haas, Fabrízio de Royes Mello and Simon Riggs
Detailed review by Mitsumasa Kondo
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For extra clarity.
Rajeev Rastogi, reviewed by Amit Kapila
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From: Dimitri Fontaine <dimitri@2ndQuadrant.fr>
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Chistopher Browne, reviewed by Sameer Thakur, Amit Kapila, and
Peter Eisentraut.
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This was broken in d6464fdc0a591662e5e5ee1b0303932e89cb027c.
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When wal_level=logical, we'll log columns from the old tuple as
configured by the REPLICA IDENTITY facility added in commit
07cacba983ef79be4a84fcd0e0ca3b5fcb85dd65. 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.
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SQL-standard TABLE() is a subset of UNNEST(); they deal with arrays and
other collection types. This feature, however, deals with set-returning
functions. Use a different syntax for this feature to keep open the
possibility of implementing the standard TABLE().
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Miles Elam
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Noted by Peter Geoghegan
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This sets up ECDH key exchange, when compiling against OpenSSL that
supports EC. Then the ECDHE-RSA and ECDHE-ECDSA cipher suites can be
used for SSL connections. The latter one means that EC keys are now
usable.
The reason for EC key exchange is that it's faster than DHE and it
allows to go to higher security levels where RSA will be horribly slow.
There is also new GUC option ssl_ecdh_curve that specifies the curve
name used for ECDH. It defaults to "prime256v1", which is the most
common curve in use in HTTPS.
From: Marko Kreen <markokr@gmail.com>
Reviewed-by: Adrian Klaver <adrian.klaver@gmail.com>
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The query ID is the internal hash identifier of the statement,
and was not available in pg_stat_statements view so far.
Daniel Farina, Sameer Thakur and Peter Geoghegan, reviewed by me.
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By default, OpenSSL (and SSL/TLS in general) lets the client cipher
order take priority. This is OK for browsers where the ciphers were
tuned, but few PostgreSQL client libraries make the cipher order
configurable. So it makes sense to have the cipher order in
postgresql.conf take priority over client defaults.
This patch adds the setting "ssl_prefer_server_ciphers" that can be
turned on so that server cipher order is preferred. Per discussion,
this now defaults to on.
From: Marko Kreen <markokr@gmail.com>
Reviewed-by: Adrian Klaver <adrian.klaver@gmail.com>
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Text from Adam Vande More
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Previously, the requirements of how intermediate certificates were
handled and their chain to root certificates was unclear.
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Report from Erik Rijkers
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Previously missing or invalid service files returned NULL. Also fix
pg_upgrade to report "out of memory" for a null return from
PQconndefaults().
Patch by Steve Singer, rewritten by me
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Add more documentation about how different exit codes and signals are
handled in each case.
Reviewed-by: Peter Geoghegan <pg@heroku.com>
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Wording by Alvaro Herrera
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Per suggestions from Andres Freund. Also fix spelling of
Sergey Burladyan's name.
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I'm putting these up for review before I start to extract the relevant
subsets for the older branches. It'll be easier to make any suggested
wording improvements at this stage.
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The makes the output more consistent with the existing DSSSL setup.
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This is mostly to fix incorrect migration instructions: since the preceding
minor releases advised reindexing some GIST indexes, it's important that
we back-link to that advice rather than earlier instances.
Also improve some bug descriptions and fix a few typos.
No back-patch yet; these files will get copied into the back branches
later in the release process.
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The previously used custom template is no longer necessary because
parameters provided by the standard style sheet can achieve the same
outcome.
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Adjust order of fields to match view order.
Jaime Casanova
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From: Andreas Karlsson <andreas@proxel.se>
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Per report from AK
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The latest fixes removed a limitation that was still in the docs, so Zoltan updated the docs, too.
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Haribabu kommi, slightly modified by me.
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Backpatch to 9.1.
Josh Kupershmidt
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Reviewed-by: Ali Dar <ali.munir.dar@gmail.com>
Reviewed-by: Amit Khandekar <amit.khandekar@enterprisedb.com>
Reviewed-by: Rodolfo Campero <rodolfo.campero@anachronics.com>
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That way, the HTML file name of the index will be the same as currently
for the DSSSL build.
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Change SET LOCAL/CONSTRAINTS/TRANSACTION behavior outside of a
transaction block from error (post-9.3) to warning. (Was nothing in <=
9.3.) Also change ABORT outside of a transaction block from notice to
warning.
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ECPG is not supposed to allow and output nested comments in C. These comments
are only allowed in the SQL parts and must not be written into the C file.
Also the different handling of different comments is documented.
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From: Dimitri Fontaine <dimitri@2ndQuadrant.fr>
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This patch adds the ability to write TABLE( function1(), function2(), ...)
as a single FROM-clause entry. The result is the concatenation of the
first row from each function, followed by the second row from each
function, etc; with NULLs inserted if any function produces fewer rows than
others. This is believed to be a much more useful behavior than what
Postgres currently does with multiple SRFs in a SELECT list.
This syntax also provides a reasonable way to combine use of column
definition lists with WITH ORDINALITY: put the column definition list
inside TABLE(), where it's clear that it doesn't control the ordinality
column as well.
Also implement SQL-compliant multiple-argument UNNEST(), by turning
UNNEST(a,b,c) into TABLE(unnest(a), unnest(b), unnest(c)).
The SQL standard specifies TABLE() with only a single function, not
multiple functions, and it seems to require an implicit UNNEST() which is
not what this patch does. There may be something wrong with that reading
of the spec, though, because if it's right then the spec's TABLE() is just
a pointless alternative spelling of UNNEST(). After further review of
that, we might choose to adopt a different syntax for what this patch does,
but in any case this functionality seems clearly worthwhile.
Andrew Gierth, reviewed by Zoltán Böszörményi and Heikki Linnakangas, and
significantly revised by me
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Backpatch to 9.3
Per report from Steffen Hildebrandt
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