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Tom Lane fedc97cdfd Remove ruleutils.c's special case for BIT [VARYING] literals. 
Up to now, get_const_expr() insisted on prefixing BIT and VARBIT
literals with 'B'.  That's not really necessary, because we always
append explicit-cast syntax to identify the constant's type.
Moreover, it's subtly wrong for VARBIT, because the parser will
interpret B'...' as '...'::"bit"; see make_const() which explicitly
assigns type BITOID for a T_BitString literal.  So what had been
a simple VARBIT literal is reconstructed as ('...'::"bit")::varbit,
which is not the same thing, at least not before constant folding.
This results in odd differences after dump/restore, as complained
of by the patch submitter, and it could result in actual failures in
partitioning or inheritance DDL operations (see commit 542320c2b,
which repaired similar misbehaviors for some other data types).

Fixing it is pretty easy: just remove the special case and let the
default code path handle these types.  We could have kept the special
case for BIT only, but there seems little point in that.

Like the previous patch, I judge that back-patching this into stable
branches wouldn't be a good idea.  However, it seems not quite too
late for v11, so let's fix it there.

Paul Guo, reviewed by Davy Machado and John Naylor, minor adjustments
by me

Discussion: https://postgr.es/m/CABQrizdTra=2JEqA6+Ms1D1k1Kqw+aiBBhC9TreuZRX2JzxLAA@mail.gmail.com
2018-09-11 16:32:25 -04:00
config Remove test for VA_ARGS, implied by C99. 2018-08-24 10:41:45 -07:00
contrib Remove ruleutils.c's special case for BIT [VARYING] literals. 2018-09-11 16:32:25 -04:00
doc Improve behavior of to_timestamp()/to_date() functions 2018-09-09 21:19:51 +03:00
src Remove ruleutils.c's special case for BIT [VARYING] literals. 2018-09-11 16:32:25 -04:00
.dir-locals.el Update documentation editor setup instructions 2018-07-13 21:23:41 +02:00
.gitattributes Remove contrib/tsearch2. 2017-02-13 11:06:11 -05:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
aclocal.m4 Add configure infrastructure (--with-llvm) to enable LLVM support. 2018-03-20 17:26:25 -07:00
configure Refactor dlopen() support 2018-09-06 11:33:04 +02:00
configure.in Refactor dlopen() support 2018-09-06 11:33:04 +02:00
COPYRIGHT Update copyright for 2018 2018-01-02 23:30:12 -05:00
GNUmakefile.in Remove unwanted "garbage cleanup" logic in Makefiles. 2018-08-08 14:32:29 -04:00
HISTORY Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
Makefile Fix non-GNU makefiles for AIX make. 2017-11-30 00:57:22 -08:00
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/.