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Tom Lane 5076f88bc9 Remove incidental dependencies on partitioned_rels lists. 
It turns out that the calculation of [Merge]AppendPath.partitioned_rels
in allpaths.c is faulty and sometimes omits relevant non-leaf partitions,
allowing an assertion added by commit a929e17e5a to trigger.  Rather
than fix that, it seems better to get rid of those fields altogether.
We don't really need the info until create_plan time, and calculating
it once for the selected plan should be cheaper than calculating it
for each append path we consider.

This patch undoes a couple of very minor uses of the partitioned_rels
values.

createplan.c was testing for nil-ness to optimize away the preparatory
work for make_partition_pruneinfo().  That is worth doing if the check
is nigh free, but it's not worth going to any great lengths to avoid.

create_append_path() was testing for nil-ness as part of deciding how
to set up ParamPathInfo for an AppendPath.  I replaced that with a
check for the appendrel's parent rel being partitioned.  That's not
quite the same thing but should cover most cases.  If we note any
interesting loss of optimizations, we can dumb this down to just
always use the more expensive method when the parent is a baserel.

Discussion: https://postgr.es/m/87sg8tqhsl.fsf@aurora.ydns.eu
Discussion: https://postgr.es/m/CAJKUy5gCXDSmFs2c=R+VGgn7FiYcLCsEFEuDNNLGfoha=pBE_g@mail.gmail.com
2021-02-01 14:34:59 -05:00
config Update copyright for 2021 2021-01-02 13:06:25 -05:00
contrib Introduce --with-ssl={openssl} as a configure option 2021-02-01 19:19:44 +09:00
doc SEARCH and CYCLE clauses 2021-02-01 14:32:51 +01:00
src Remove incidental dependencies on partitioned_rels lists. 2021-02-01 14:34:59 -05:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add .editorconfig 2019-12-18 09:13:13 +01:00
.gitattributes gitattributes: Add new file 2019-11-12 08:13:55 +01:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
aclocal.m4 Remove configure-time probe for DocBook DTD. 2020-11-30 15:24:13 -05:00
configure Introduce --with-ssl={openssl} as a configure option 2021-02-01 19:19:44 +09:00
configure.ac Introduce --with-ssl={openssl} as a configure option 2021-02-01 19:19:44 +09:00
COPYRIGHT Update copyright for 2021 2021-01-02 13:06:25 -05:00
GNUmakefile.in Make install-tests target work with vpath builds 2020-05-31 18:33:00 -04:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:36:21 +12:00
README Canonicalize some URLs 2020-02-10 20:47:50 +01:00
README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00

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/.