Fix whitespace
Suppress Coverity complaints in readfuncs.c.

Coverity is complaining that the value returned by pg_strtok in
READ_LOCATION_FIELD and READ_BITMAPSET_FIELD macros is not used. In commit
39bfc94c86f1990e9db8ea3da0e82995cc1b76db, we did this to the other macros
to placate compilers that complained when the variable was completely
unused, this extends that to the last remaining macros.
Split ECPGdo() in constituent parts

This splits ECPGdo() into ecpg_prologue(), ecpg_do() and
ecpg_epilogue(), and renames free_params() into ecpg_free_params() and
exports it.  This makes it possible for future code to use these
routines for their own purposes.

There is no user-visible functionality change here, only code
reorganization.

Zoltán Böszörményi

Reviewed by Antonin Houska.  Larger, older versions of this patch were
reviewed by Noah Misch and Michael Meskes.
Add display of oprcode (the underlying function's name) to psql's \do+.

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
Split ecpg_execute() in constituent parts

Split the rather long ecpg_execute() function into ecpg_build_params(),
ecpg_autostart_transaction(), a smaller ecpg_execute() and
ecpg_process_output().  There is no user-visible change here, only code
reorganization to support future patches.

Author: Zoltán Böszörményi

Reviewed by Antonin Houska.  Larger, older versions of this patch were
reviewed by Noah Misch and Michael Meskes.
Fix Hot Standby feedback sending when streaming busily.

Commit 6f60fdd7015b032bf49273c99f80913d57eac284 accidentally removed a
call to XLogWalRcvSendHSFeedback() after flushing received WAL to disk.
The consequence is that when walsender is busy streaming WAL, it doesn't
send HS feedback messages. One is sent if nothing is received from the
master for 100ms, but if there's a steady stream of WAL, it never happens.

Backpatch to 9.3.

Andres Freund and Amit Kapila
docs:  update PL/pgSQL docs about the use of := and =
doc: fix := description typo.
doc:  rename "Equals" to "Equal"
Prevent integer overflow with --progress >= 2148

If --progress=2148 or higher was given, the calculation of the next time
to report overflowed, and pgbench would print a progress report very
frequently.

Kingter Wang
Define WIN32 when _WIN32 is set

_WIN32 is set by the compiler, whereas our code uses WIN32 that is
normally set through our build system. To make it possible to build
extensions out of tree we cannot rely on that, so set the WIN32
symbol explicitly whenever the compiler has set _WIN32.

Not setting this symbol causes double inclusion of pg_config_os.h,
and possibly other errors as well.

Craig Ringer
Show SSL encryption information when logging connections

Expand the messages when log_connections is enabled to include the
fact that SSL is used and the SSL cipher information.

Dr. Andreas Kunert, review by Marko Kreen
Prevent double macro definition of WIN32.

David Rowley.
Export set_latch_on_sigusr1 symbol for Windows.

Per buildfarm currawong and grip from David Rowley.
Add gen_random_uuid() to contrib/pgcrypto.

This function provides a way of generating version 4 (pseudorandom) UUIDs
based on pgcrypto's PRNG.  The main reason for doing this is that the
OSSP UUID library depended on by contrib/uuid-ossp is becoming more and
more of a porting headache, so we need an alternative for people who can't
install that.  A nice side benefit though is that this implementation is
noticeably faster than uuid-ossp's uuid_generate_v4() function.

Oskari Saarenmaa, reviewed by Emre Hasegeli
Minor code beautification in contrib/sslinfo.

Static-ify some functions that didn't need to be exported, and improve
a couple of comments.

Gurjeet Singh
Fix client-only installation

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>
Export a few more symbols required for test_shm_mq module.

Patch from Amit Kapila.
Make various variables const (read-only).

These changes should generally improve correctness/maintainability.
A nice side benefit is that several kilobytes move from initialized
data to text segment, allowing them to be shared across processes and
probably reducing copy-on-write overhead while forking a new backend.
Unfortunately this doesn't seem to help libpq in the same way (at least
not when it's compiled with -fpic on x86_64), but we can hope the linker
at least collects all nominally-const data together even if it's not
actually part of the text segment.

Also, make pg_encname_tbl[] static in encnames.c, since there seems
no very good reason for any other code to use it; per a suggestion
from Wim Lewis, who independently submitted a patch that was mostly
a subset of this one.

Oskari Saarenmaa, with some editorialization by me
Allow SET TABLESPACE to database default

We've always allowed CREATE TABLE to create tables in the database's default
tablespace without checking for CREATE permissions on that tablespace.
Unfortunately, the original implementation of ALTER TABLE ... SET TABLESPACE
didn't pick up on that exception.

This changes ALTER TABLE ... SET TABLESPACE to allow the database's default
tablespace without checking for CREATE rights on that tablespace, just as
CREATE TABLE works today.  Users could always do this through a series of
commands (CREATE TABLE ... AS SELECT * FROM ...; DROP TABLE ...; etc), so
let's fix the oversight in SET TABLESPACE's original implementation.