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b9cf94c8c2
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Tom Lane b9cf94c8c2 Doc: improve documentation around jsonpath regular expressions. 
Provide some documentation about the differences between XQuery
regular expressions and those supported by Spencer's regex engine.
Since SQL now exposes XQuery regexps with the LIKE_REGEX operator,
I made this a standalone section designed to help somebody who
has to translate a LIKE_REGEX query to Postgres.  (Eventually we might
extend Spencer's engine to allow precise implementation of XQuery,
but not today.)

Reference that in the jsonpath docs, provide definitions of the
XQuery flag letters, and add a description of the JavaScript-inspired
string literal syntax used within jsonpath.  Also point out explicitly
that backslashes used within like_regex patterns will need to be doubled.

This also syncs the docs with the decision implemented in commit
d5b90cd64 to desupport XQuery's 'x' flag for now.

Jonathan Katz and Tom Lane

Discussion: https://postgr.es/m/CAPpHfdvDci4iqNF9fhRkTqhe-5_8HmzeLt56drH%2B_Rv2rNRqfg@mail.gmail.com
2019-09-19 11:22:21 -04:00
config Update config.guess and config.sub 2019-04-27 14:25:00 +02:00
contrib amcheck: Skip unlogged relations during recovery. 2019-08-12 15:21:30 -07:00
doc Doc: improve documentation around jsonpath regular expressions. 2019-09-19 11:22:21 -04:00
src GSSAPI error message improvements 2019-09-19 15:09:38 +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
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aclocal.m4
configure Stamp 12beta4. 2019-09-09 16:24:29 -04:00
configure.in Stamp 12beta4. 2019-09-09 16:24:29 -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
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:36:21 +12:00
README
README.git

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/.