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Fujii Masao 64ed30fda8 doc: Clarify COPY FROM WHERE expression restrictions 
Commit aa606b9316 disallowed generated columns in COPY FROM WHERE
expressions, and commit 21c69dc73f disallowed system columns.
However, the COPY reference page still mentions only the restriction
on subqueries.

Update the documentation to also list generated columns and system
columns as unsupported in COPY FROM WHERE expressions.

Backpatch the generated-column documentation change to all supported
versions. Backpatch the system-column documentation change to v19,
where that restriction was introduced.

Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Ayush Tiwari <ayushtiwari.slg01@gmail.com>
Discussion: https://postgr.es/m/CAHGQGwEgxErc54yVOAVWCsr1O=8pgw4oKRPuEQ9mfhkoYGR_XA@mail.gmail.com
Backpatch-through: 14
2026-07-08 12:45:05 +09:00
.github ci: Improve ccache handling 2026-06-08 15:26:47 -04:00
config Update config.guess and config.sub 2026-04-09 11:26:14 +02:00
contrib postgres_fdw: Report ANALYZE to pgstats after importing statistics. 2026-07-07 18:40:00 +09:00
doc doc: Clarify COPY FROM WHERE expression restrictions 2026-07-08 12:45:05 +09:00
src pg_locale_libc.c: add missing casts to unsigned char. 2026-07-07 18:21:28 -07:00
.dir-locals.el
.editorconfig
.git-blame-ignore-revs Add previous 2 commits to .git-blame-ignore-revs. 2026-06-29 15:33:52 -04:00
.gitattributes Update .editorconfig and .gitattributes for postgresql.conf.sample. 2025-11-18 10:28:36 -06:00
.gitignore
.mailmap
aclocal.m4
configure Stamp 19beta1. 2026-06-01 16:02:13 -04:00
configure.ac Stamp 19beta1. 2026-06-01 16:02:13 -04:00
COPYRIGHT Update copyright for 2026 2026-01-01 13:24:10 -05:00
GNUmakefile.in
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Adapt REL_19_STABLE to its new status as a stable branch 2026-06-29 16:39:23 -04:00
meson.build Stamp 19beta1. 2026-06-01 16:02:13 -04:00
meson_options.txt
README.md Adapt REL_19_STABLE to its new status as a stable branch 2026-06-29 16:39:23 -04:00

README.md

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.

Copyright and license information can be found in the file COPYRIGHT.

General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/19/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/19/installation.html.

The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.