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Tom Lane d5a905ed5e Fix psql's \connect command some more. 
Jasen Betts reported yet another unintended side effect of commit
85c54287a: reconnecting with "\c service=whatever" did not have the
expected results.  The reason is that starting from the output of
PQconndefaults() effectively allows environment variables (such
as PGPORT) to override entries in the service file, whereas the
normal priority is the other way around.

Not using PQconndefaults at all would require yet a third main code
path in do_connect's parameter setup, so I don't really want to fix
it that way.  But we can have the logic effectively ignore all the
default values for just a couple more lines of code.

This patch doesn't change the behavior for "\c -reuse-previous=on
service=whatever".  That remains significantly different from before
85c54287a, because many more parameters will be re-used, and thus
not be possible for service entries to replace.  But I think this
is (mostly?) intentional.  In any case, since libpq does not report
where it got parameter values from, it's hard to do differently.

Per bug #16936 from Jasen Betts.  As with the previous patches,
back-patch to all supported branches.  (9.5 is unfortunately now
out of support, so this won't get fixed there.)

Discussion: https://postgr.es/m/16936-3f524322a53a29f0@postgresql.org
2021-03-23 14:27:50 -04:00
config configure: Update python search order 2019-01-13 10:25:23 +01:00
contrib Fix ancient memory leak in contrib/auto_explain. 2021-02-02 13:49:08 -05:00
doc Use correct spelling of statistics kind 2021-03-23 04:54:34 +01:00
src Fix psql's \connect command some more. 2021-03-23 14:27:50 -04:00
.dir-locals.el
.gitattributes Remove contrib/tsearch2. 2017-02-13 11:06:11 -05:00
.gitignore Allow .so minor version numbers above 9 in .gitignore. 2016-08-15 17:35:35 -04:00
aclocal.m4 Fix configure's AC_CHECK_DECLS tests to work correctly with clang. 2018-11-19 12:01:47 -05:00
configure Stamp 10.16. 2021-02-08 16:59:29 -05:00
configure.in Stamp 10.16. 2021-02-08 16:59:29 -05:00
COPYRIGHT Update copyright for 2021 2021-01-02 13:06:24 -05:00
GNUmakefile.in Make install-tests target work with vpath builds 2020-05-31 18:35:31 -04:00
HISTORY Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:40:54 +12:00
README Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
README.git Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00

README 

PostgreSQL Database Management System
=====================================

This directory contains the source code distribution of the PostgreSQL
database management system.

PostgreSQL is an advanced object-relational database management system
that supports an extended subset of the SQL standard, including
transactions, foreign keys, subqueries, triggers, user-defined types
and functions.  This distribution also contains C language bindings.

PostgreSQL has many language interfaces, many of which are listed here:

	https://www.postgresql.org/download

See the file INSTALL for instructions on how to build and install
PostgreSQL.  That file also lists supported operating systems and
hardware platforms and contains information regarding any other
software packages that are required to build or run the PostgreSQL
system.  Copyright and license information can be found in the
file COPYRIGHT.  A comprehensive documentation set is included in this
distribution; it can be read as described in the installation
instructions.

The latest version of this software may be obtained at
https://www.postgresql.org/download/.  For more information look at our
web site located at https://www.postgresql.org/.