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Mirror of the official PostgreSQL GIT repository. Note that this is just a *mirror* - we don't work with pull requests on github. To contribute, please see https://wiki.postgresql.org/wiki/Submitting_a_Patch
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f391d9dc93
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Tom Lane f391d9dc93 Convert tab-complete's long else-if chain to a switch statement. 
Rename tab-complete.c to tab-complete.in.c, create the preprocessor
script gen_tabcomplete.pl, and install Makefile/meson.build rules
to create tab-complete.c from tab-complete.in.c.  The preprocessor
converts match_previous_words' else-if chain into a switch and
populates tcpatterns[] with the data needed by the driver loop.

The initial HeadMatches/TailMatches/Matches test in each else-if arm
is now performed in a table-driven loop.  Where we get a match, the
corresponding switch case is invoked to see if the match succeeds.
(It might not, if there were additional conditions in the original
else-if test.)

The total number of string comparisons done is just about the
same as it was in the previous coding; however, now that we
have table-driven logic underlying the handmade rules, there
is room to improve that.  For now I haven't bothered because
tab completion is still plenty fast enough for human use.
If the number of rules keeps increasing, we might someday
need to do more in that area.

The immediate benefit of all this thrashing is that C compilers
frequently don't deal well with long else-if chains.  On gcc 8.5.0,
this reduces the compile time of tab-complete.c by about a factor of
four, while MSVC is reported to crash outright with the previous
coding.

Discussion: https://postgr.es/m/2208466.1720729502@sss.pgh.pa.us
2024-10-07 12:22:10 -04:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Simplify checking for xlocale.h 2024-10-01 07:23:45 -04:00
contrib Fix fetching default toast value during decoding of in-progress transactions. 2024-10-07 15:38:45 +05:30
doc doc: Quote value in SET NAMES documentation 2024-10-07 11:50:39 +02:00
src Convert tab-complete's long else-if chain to a switch statement. 2024-10-07 12:22:10 -04:00
.cirrus.star Remove duplicate words in docs and code comments. 2023-10-09 09:18:47 +05:30
.cirrus.tasks.yml Add PG_TEST_PG_COMBINEBACKUP_MODE to CI tasks 2024-09-10 16:30:38 +02:00
.cirrus.yml ci: Make compute resources for CI configurable 2023-08-23 15:15:28 -07:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
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.git-blame-ignore-revs Add commit 7229ebe011 to .git-blame-ignore-revs. 2024-09-14 20:17:30 +02:00
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.gitignore Update top-level .gitignore. 2022-12-04 15:23:00 -05:00
aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Simplify checking for xlocale.h 2024-10-01 07:23:45 -04:00
configure.ac Simplify checking for xlocale.h 2024-10-01 07:23:45 -04:00
COPYRIGHT Update copyright for 2024 2024-01-03 20:49:05 -05:00
GNUmakefile.in Allow selecting the git revision to be packaged by "make dist". 2024-05-03 11:08:50 -04:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Remove AIX support 2024-02-28 15:17:23 +04:00
meson_options.txt Remove spinlocks and atomics from meson_options.txt. 2024-07-30 23:37:14 +12:00
meson.build Simplify checking for xlocale.h 2024-10-01 07:23:45 -04:00
README.md Revise the style of a paragraph in README.md. 2024-03-21 10:16:41 -05:00

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/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/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/.