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Tom Lane 662d12aea1 Avoid crash in eval_const_expressions if a Param's type changes. Since commit `6719b238e` it's been possible for the values of plpgsql record field variables to be exposed to the planner as Params. (Before that, plpgsql never supplied values for such variables during planning, so that the problematic code wasn't reached.) Other places that touch potentially-type-mutable Params either cope gracefully or do runtime-test-and-ereport checks that the type is what they expect. But eval_const_expressions() just had an Assert, meaning that it either failed the assertion or risked crashes due to using an incompatible value. In this case, rather than throwing an ereport immediately, we can just not perform a const-substitution in case of a mismatch. This seems important for the same reason that the Param fetch was speculative: we might not actually reach this part of the expression at runtime. Test case will follow in a separate commit. Patch by me, pursuant to bug report from Andrew Gierth. Back-patch to v11 where the previous commit appeared. Discussion: https://postgr.es/m/87wotkfju1.fsf@news-spur.riddles.org.uk		2018-07-26 16:08:45 -04:00
config	LLVMJIT: Adapt to API changes in gdb and perf support.	2018-07-22 21:13:34 -07:00
contrib	Make more consistent some error messages for file-related operations	2018-07-23 09:19:12 +09:00
doc	Add strict_multi_assignment and too_many_rows plpgsql checks	2018-07-25 01:46:32 +02:00
src	Avoid crash in eval_const_expressions if a Param's type changes.	2018-07-26 16:08:45 -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	Use setproctitle_fast() to update the ps status, if available.	2018-07-24 13:09:22 +12:00
configure.in	Use setproctitle_fast() to update the ps status, if available.	2018-07-24 13:09:22 +12:00
COPYRIGHT	Update copyright for 2018	2018-01-02 23:30:12 -05:00
GNUmakefile.in	Have "make coverage" recurse into contrib as well	2016-09-05 18:44:36 -03:00
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/.