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Tomas Vondra eaf900e842 Check for tables with sql_identifier during pg_upgrade Commit `7c15cef86d` changed sql_identifier data type to be based on name instead of varchar. Unfortunately, this breaks on-disk format for this data type. Luckily, that should be a very rare problem, as this data type is used only in information_schema views, so this only affects user objects (tables, materialized views and indexes). One way to end in such situation is to do CTAS with a query on those system views. There are two options to deal with this - we can either abort pg_upgrade if there are user objects with sql_identifier columns in pg_upgrade, or we could replace the sql_identifier type with varchar. Considering how rare the issue is expected to be, and the complexity of replacing the data type (e.g. in matviews), we've decided to go with the simple check. The query is somewhat complex - the sql_identifier data type may be used indirectly - through a domain, a composite type or both, possibly in multiple levels. Detecting this requires a recursive CTE. Backpatch to 12, where the sql_identifier definition changed. Reported-by: Hans Buschmann Author: Tomas Vondra Reviewed-by: Tom Lane Backpatch-to: 12 Discussion: https://postgr.es/m/16045-673e8fa6b5ace196%40postgresql.org		2019-10-14 23:40:58 +02:00
config	Update config.guess and config.sub	2019-04-27 14:25:00 +02:00
contrib	Update test output of sepgsql for ALTER TABLE COLUMN DROP	2019-10-14 08:58:47 +09:00
doc	doc: improve docs so config value default units are clearer	2019-10-08 21:49:08 -04:00
src	Check for tables with sql_identifier during pg_upgrade	2019-10-14 23:40:58 +02:00
.dir-locals.el	Make Emacs perl-mode indent more like perltidy.	2019-01-13 11:32:31 -08:00
.gitattributes	Add XSL stylesheet to fix up SVG files	2019-06-19 21:26:42 +02:00
.gitignore	Support for optimizing and emitting code in LLVM JIT provider.	2018-03-22 11:05:22 -07:00
aclocal.m4	Fix configure's AC_CHECK_DECLS tests to work correctly with clang.	2018-11-19 12:01:47 -05:00
configure	Stamp 12.0.	2019-09-30 16:06:55 -04:00
configure.in	Stamp 12.0.	2019-09-30 16:06:55 -04:00
COPYRIGHT	Update copyright for 2019	2019-01-02 12:44:25 -05:00
GNUmakefile.in	Integrate cpluspluscheck into build system.	2019-05-31 12:36:17 -07:00
HISTORY	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00
Makefile	Don't unset MAKEFLAGS in non-GNU Makefile.	2019-06-25 09:36:21 +12:00
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/.