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David Rowley 56ff8b2991 Use a lookup table for units in pg_size_pretty and pg_size_bytes 
We've grown 2 versions of pg_size_pretty over the years, one for BIGINT
and one for NUMERIC.  Both should output the same, but keeping them in
sync is harder than needed due to neither function sharing a source of
truth about which units to use and how to transition to the next largest
unit.

Here we add a static array which defines the units that we recognize and
have both pg_size_pretty and pg_size_pretty_numeric use it.  This will
make adding any units in the future a very simple task.

The table contains all information required to allow us to also modify
pg_size_bytes to use the lookup table, so adjust that too.

There are no behavioral changes here.

Author: David Rowley
Reviewed-by: Dean Rasheed, Tom Lane, David Christensen
Discussion: https://postgr.es/m/CAApHDvru1F7qsEVL-iOHeezJ+5WVxXnyD_Jo9nht+Eh85ekK-Q@mail.gmail.com
 		2021-07-09 16:29:02 +12:00
config Update config.guess and config.sub 2021-04-21 16:33:40 +02:00
contrib Improve error messages about mismatching relkind 2021-07-08 09:44:51 +02:00
doc doc: Fix description about pg_stat_statements.track_planning. 2021-07-07 21:54:47 +09:00
src Use a lookup table for units in pg_size_pretty and pg_size_bytes 2021-07-09 16:29:02 +12:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add .editorconfig 2019-12-18 09:13:13 +01:00
.git-blame-ignore-revs Add pgindent commit to git-blame-ignore-revs file. 2021-06-28 09:22:24 -07:00
.gitattributes gitattributes: Add new entry to silence whitespace error 2021-06-05 07:57:31 +02:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
COPYRIGHT Update copyright for 2021 2021-01-02 13:06:25 -05:00
GNUmakefile.in add missing tag from commit b8c4261e5e 2021-07-01 15:47:46 -04:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:36:21 +12:00
README Canonicalize some URLs 2020-02-10 20:47:50 +01:00
README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00
aclocal.m4 Remove configure-time probe for DocBook DTD. 2020-11-30 15:24:13 -05:00
configure Stamp HEAD as 15devel. 2021-06-28 11:31:16 -04:00
configure.ac Stamp HEAD as 15devel. 2021-06-28 11:31:16 -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/.