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Alvaro Herrera 6009bad913 Fix ALTER/TYPE on columns referenced by FKs in partitioned tables 
When ALTER TABLE ... SET DATA TYPE affects a column referenced by
constraints and indexes, it drop those constraints and indexes and
recreates them afterwards, so that the definitions match the new data
type.  The original code did this by dropping one object at a time
(commit 077db40fa1 of May 2004), which worked fine because the
dependencies between the objects were pretty straightforward, and
ordering the objects in a specific way was enough to make this work.
However, when there are foreign key constraints in partitioned tables,
the dependencies are no longer so straightforward, and we were getting
errors when attempted:
  ERROR:  cache lookup failed for constraint 16398

This can be fixed by doing all the drops in one pass instead, using
performMultipleDeletions (introduced by df18c51f29 of Aug 2006).  With
this change we can also remove the code to carefully order the list of
objects to be deleted.

Reported-by: Rajkumar Raghuwanshi <rajkumar.raghuwanshi@enterprisedb.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CAKcux6nWS_m+s=1Udk_U9B+QY7pA-Ac58qR5BdUfOyrwnWHDew@mail.gmail.com
2018-09-14 14:22:22 -03:00
config Detect LLVM 7 without specifying binaries explicitly. 2018-09-13 10:42:13 -07:00
contrib Remove ruleutils.c's special case for BIT [VARYING] literals. 2018-09-11 16:32:26 -04:00
doc doc: adjust PG 11 release notes 2018-09-11 17:01:51 -04:00
src Fix ALTER/TYPE on columns referenced by FKs in partitioned tables 2018-09-14 14:22:22 -03:00
.dir-locals.el Update documentation editor setup instructions 2018-07-13 21:28:18 +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 Detect LLVM 7 without specifying binaries explicitly. 2018-09-13 10:42:13 -07:00
configure.in Stamp 11beta3. 2018-08-06 16:02:42 -04:00
COPYRIGHT Update copyright for 2018 2018-01-02 23:30:12 -05:00
GNUmakefile.in Ensure we build generated headers at the start of some more cases. 2018-07-30 18:04:39 -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/.