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Tom Lane 687f096ea9 Make PL/Python handle domain-type conversions correctly. 
Fix PL/Python so that it can handle domains over composite, and so that
it enforces domain constraints correctly in other cases that were not
always done properly before.  Notably, it didn't do arrays of domains
right (oversight in commit c12d570fa), and it failed to enforce domain
constraints when returning a composite type containing a domain field,
and if a transform function is being used for a domain's base type then
it failed to enforce domain constraints on the result.  Also, in many
places it missed checking domain constraints on null values, because
the plpy_typeio code simply wasn't called for Py_None.

Rather than try to band-aid these problems, I made a significant
refactoring of the plpy_typeio logic.  The existing design of recursing
for array and composite members is extended to also treat domains as
containers requiring recursion, and the APIs for the module are cleaned
up and simplified.

The patch also modifies plpy_typeio to rely on the typcache more than
it did before (which was pretty much not at all).  This reduces the
need for repetitive lookups, and lets us get rid of an ad-hoc scheme
for detecting changes in composite types.  I added a couple of small
features to typcache to help with that.

Although some of this is fixing bugs that long predate v11, I don't
think we should risk a back-patch: it's a significant amount of code
churn, and there've been no complaints from the field about the bugs.

Tom Lane, reviewed by Anthony Bykov

Discussion: https://postgr.es/m/24449.1509393613@sss.pgh.pa.us
2017-11-16 16:23:04 -05:00
config Prevent int128 from requiring more than MAXALIGN alignment. 2017-11-14 15:03:55 -05:00
contrib Make PL/Python handle domain-type conversions correctly. 2017-11-16 16:23:04 -05:00
doc Add parallel_leader_participation GUC. 2017-11-15 08:23:18 -05:00
src Make PL/Python handle domain-type conversions correctly. 2017-11-16 16:23:04 -05:00
.dir-locals.el emacs: Set indent-tabs-mode in perl-mode 2015-04-12 23:53:23 -04:00
.gitattributes Remove contrib/tsearch2. 2017-02-13 11:06:11 -05:00
.gitignore Add lcov --initial 2017-09-29 08:54:34 -04:00
aclocal.m4 Make configure check for IPC::Run when --enable-tap-tests is specified. 2017-06-15 15:56:12 -04:00
configure Prevent int128 from requiring more than MAXALIGN alignment. 2017-11-14 15:03:55 -05:00
configure.in Prevent int128 from requiring more than MAXALIGN alignment. 2017-11-14 15:03:55 -05:00
COPYRIGHT Update copyright for 2017 2017-01-03 12:37:53 -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 Prevent passing down MAKELEVEL/MAKEFLAGS from non-GNU make to GNU make. 2017-08-09 12:05:53 -04:00
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/.