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https://github.com/darold/pgFormatter

A PostgreSQL SQL syntax beautifier that can work as a console program or as a CGI. On-line demo site at http://sqlformat.darold.net/
https://github.com/darold/pgFormatter

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A PostgreSQL SQL syntax beautifier that can work as a console program or as a CGI. On-line demo site at http://sqlformat.darold.net/

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README 

        
NAME

    pg_format - PostgreSQL SQL syntax beautifier



DESCRIPTION

    This SQL formatter/beautifier supports keywords from SQL-92, SQL-99,

    SQL-2003, SQL-2008, SQL-2011 and PostgreSQL specifics keywords. Works

    with any other databases too.



    pgFormatter can work as a console program or as a CGI. It will

    automatically detect its environment and format output as text or as

    HTML following the context. It can also return a JSON-formatted response

    if used as CGI with 'Accept: application/json'.



    Keywords highlighting will only be available in CGI context.



  Terminal/console execution

    Usage: pg_format [options] file.sql



        PostgreSQL SQL queries and PL/PGSQL code beautifier.



    Arguments:



        file.sql can be a file, multiple files or use - to read query from stdin.



        Returning the SQL formatted to stdout or into a file specified with

        the -o | --output option.



    Options:



        -a | --anonymize      : obscure all literals in queries, useful to hide

                                confidential data before formatting.

        -b | --comma-start    : in a parameters list, start with the comma (see -e)

        -B | --comma-break    : in insert statement, add a newline after each comma.

        -c | --config FILE    : use a configuration file. Default is to not use

                                configuration file unless files ./.pg_format or

                                $HOME/.pg_format or the XDG Base Directory file

                                $XDG_CONFIG_HOME/pg_format/pg_format.conf exist.

        -C | --wrap-comment   : with --wrap-limit, apply reformatting to comments.

        -d | --debug          : enable debug mode. Disabled by default.

        -e | --comma-end      : in a parameters list, end with the comma (default)

        -f | --function-case N: Change the case of the PostgreSQL functions. Default

                                is unchanged: 0. Values: 0=>unchanged, 1=>lowercase,

                                2=>uppercase, 3=>capitalize.

        -F | --format STR     : output format: text or html. Default: text.

        -g | --nogrouping     : add a newline between statements in transaction

                                regroupement. Default is to group statements.

        -h | --help           : show this message and exit.

        -i | --inplace        : override input files with formatted content.

        -k | --keep-newline   : preserve empty line in plpgsql code.

        -L | --no-extra-line  : do not add an extra empty line at end of the output.

        -m | --maxlength SIZE : maximum length of a query, it will be cutted above

                                the given size. Default: no truncate.

        -M | --multiline      : enable multi-line search for -p or --placeholder.

        -n | --nocomment      : remove any comment from SQL code.

        -N | --numbering      : statement numbering as a comment before each query.

        -o | --output file    : define the filename for the output. Default: stdout.

        -p | --placeholder RE : set regex to find code that must not be changed.

        -r | --redshift       : add RedShift keyworks to the list of SQL keyworks.

                                Obsolete now, use --extra-keyword 'redshift' instead.

        -s | --spaces size    : change space indent, default 4 spaces.

        -S | --separator STR  : dynamic code separator, default to single quote.

        -t | --format-type    : try another formatting type for some statements.

        -T | --tabs           : use tabs instead of space characters, when used

                                spaces is set to 1 whatever is the value set to -s.

        -u | --keyword-case N : Change the case of the reserved keyword. Default is

                                uppercase: 2. Values: 0=>unchanged, 1=>lowercase,

                                2=>uppercase, 3=>capitalize.

        -U | --type-case N    : Change the case of the data type name. Default is

                                lowercase: 1. Values: 0=>unchanged, 1=>lowercase,

                                2=>uppercase, 3=>capitalize.

        -v | --version        : show pg_format version and exit.

        -w | --wrap-limit N   : wrap queries at a certain length.

        -W | --wrap-after N   : number of column after which lists must be wrapped.

                                Default: puts every item on its own line.

        -X | --no-rcfile      : don't read rc files automatically (./.pg_format or

                                $HOME/.pg_format or $XDG_CONFIG_HOME/pg_format).

                                The --config / -c option overrides it.

        --extra-function FILE : file containing a list of functions to use the same

                                formatting as PostgreSQL internal function.

        --extra-keyword FILE  : file containing a list of keywords to use the same

                                formatting as PostgreSQL internal keyword. Use

                                special value 'redshift' for support to Redshift

                                keywords defined internaly in pgFormatter.

        --no-space-function : remove space between function call and the open

                                parenthesis.



    Examples:



        cat samples/ex1.sql | pg_format -

        pg_format -n samples/ex1.sql

        pg_format -f 2 -n -o result.sql samples/ex1.sql



  CGI context

    Install pg_format into your cgi-bin folder, grant execution on it as a

    CGI script (maybe you should add the .cgi extension) and get it from

    your favorite browser. Copy files logo_pgformatter.png and

    icon_pgformatter.ico in the CGI directory, pg_format.cgi look for them

    in the same repository.



    You have a live example without limitation than ten thousand characters

    in your SQL query here:



            http://sqlformat.darold.net/



    pg_format will automatically detected that it is running in a CGI

    environment and will output all html code needed to run an online code

    formatter site. There's nothing more to do.



    You need to install the Perl CGI and JSON modules first. If it is not

    already the case do:



            yum install perl-cgi

            yum install perl-json

    or

            apt install libcgi-pm-perl

            apt install libjson-perl



    following your distribution.



INSTALLATION

    Following your Linux distribution you might need to install the autodie,

    ExtUtils::MakeMaker, FindBin, and open Perl modules:



            sudo yum -y install perl-autodie perl-ExtUtils-MakeMaker perl-FindBin perl-open



    Download the tarball from github and unpack the archive as follow:



            version=5.3 #please use the latest release version from github

            wget https://github.com/darold/pgFormatter/archive/refs/tags/v${version}.tar.gz

            tar xzf v${version}.tar.gz

            cd pgFormatter-${version}/

            perl Makefile.PL

            make && sudo make install

            cd ../ && rm -rf v${version}.tar.gz && rm -rf pgFormatter-${version} #clean up



    This will copy the Perl script pg_format in /usr/local/bin/pg_format

    directory by default and the man page into

    /usr/local/share/man/man1/pg_format.1. Those are the default

    installation directory for 'site' install.



    If you want to install all under /usr/ location, use INSTALLDIRS='perl'

    as argument of Makefile.PL. The script will be installed into

    /usr/bin/pg_format and the manpage into /usr/share/man/man1/pg_format.1.



    For example, to install everything just like Debian does, proceed as

    follow:



            perl Makefile.PL INSTALLDIRS=vendor



    By default INSTALLDIRS is set to site.



    Regression tests can be executed with the following command:



            make test



    If you have docker installed you can build a pgFormatter image using:



            docker build -t darold.net/pgformatter .



    then just use it as



            cat file.sql | docker run --rm -a stdin -a stdout -i darold.net/pgformatter -



SPECIAL FORMATTING

  Option -W, --wrap-after

    This option can be used to set number of column after which lists must

    be wrapped. By default pgFormatter puts every item on its own line. This

    format applies to SELECT and FROM list. For example the following query:



        SELECT a, b, c, d FROM t_1, t_2, t3 WHERE a = 10 AND b = 10;



    will be formatted into with -W 4:



        SELECT a, b, c, d

        FROM t_1, t_2, t3

        WHERE a = 10

            AND b = 10;



    Note this formatting doesn't fits well with sub queries in list.



  Option -w, --wrap-limit

    This option wraps queries at a certain length whatever is the part of

    the query at the limit unless it is a comment. For example if the limit

    is reach in a text constant the text will be wrapped. Indentation is not

    included in the character count. This option is applied in all cases

    even if other options are used.



  Option -C, --wrap-comment

    This option wraps comments at the length defined by -w, --wrap-limit

    whatever is the part of the comment. Indentation is not included in the

    character count.



  Option -t, --format-type

    This option activate an alternative formatting that adds:



      * newline in procedure/function parameter list

      * new line in PUBLICATION and POLICY DDL

      * keep enumeration in GROUP BY clause on a single line



    Expect this list grow following alternative thoughts.



  Option -g, --nogrouping

    By default pgFormatter groups all statements when they are in a

    transaction:



        BEGIN;

        INSERT INTO foo VALUES (1, 'text 1');

        INSERT INTO foo VALUES (2, 'text 2');

        ...

        COMMIT;



    By disabling grouping of statement pgFormatter will always add an extra

    newline characters between statements just like outside a transaction:



        BEGIN;



        INSERT INTO foo VALUES (1, 'text 1');



        INSERT INTO foo VALUES (2, 'text 2');

        ...



        COMMIT;



    This might add readability to not DML transactions.



  Option -L, --no-extra-line

    By default pgFormatter always adds an empty line after the end of a

    statement when it is terminated by a ; except in a plpgsql code block.

    If the extra empty line at end of the output is useless, you can remove

    it by adding this option to the command line.



  Option --extra-function

    pgFormatter applies some formatting to the PostgreSQL internal functions

    call but it can not detect user defined function. It is possible to

    defined a list of functions into a file (one function name per line) and

    give it to pgFormatter through the --extra-function option that will be

    formatter as PostgreSQL internal functions.



  Option --extra-keyword

    pgFormatter applies some formatting to the PostgreSQL internal keywords

    but it can not detect keywords for other database. It is possible to

    defined a list of keywords into a file (one keyword per line) and give

    it to pgFormatter through the --extra-keyword option that will be

    formatter as PostgreSQL internal functions.



    You can also pass a special value 'redshift' that will load the keywords

    defined internally in pgFormatter for this database. This was

    historically possible through the -r | --redshift option that is now

    obsolete and will be removed in the future.



  Option --no-space-function

    Use this option to remove the space character between a function call

    and the open parenthesis that follow. By default pgFormatter adds a

    space character, for example:



        DROP FUNCTION IF EXISTS app_public.hello (a text);



    When this option is used the resulting query is formatted as follow:



        DROP FUNCTION IF EXISTS app_public.hello(a text);



HINTS

  Configuration

    If the default settings of pg_format doesn't fit all your needs you can

    customize the behavior of pg_format by using a configuration file

    instead of repeating the command line option. By default pgFormatter

    look for files ./.pg_format or $HOME/.pg_format or

    $XDG_CONFIG_HOME/pg_format/pg_format.conf if they exists but you can

    choose an alternate configuration file using command line option -c |

    --config



    To customize the CGI pg_format.cgi look for a configuration file named

    pg_format.conf in the same directory as the CGI script.



    For a sample configuration file see doc/pg_format.conf.sample



    To prevent pg_format to look at $XDG_CONFIG_HOME/pg_format or

    $HOME/.pg_format files you can use the command line option -X |

    --no-rcfile



  Formatting from stdin

    You can execute pg_format without any argument or - to give the SQL code

    to format through stdin.



    If you use the interactive mode you have to type `ctrl+d` after typing

    your SQL statement to format to end the typing.



            $ pg_format

            select * from customers;

            < ctrl+d >



    You can use stdin in a one liner as follow:



            echo "select * from customers;" | pg_format



  Formatting from VI

    With pgFormatter, you can just add the following line to your ~/.vimrc

    file:



            au FileType sql setl formatprg=/usr/local/bin/pg_format\ -



    This lets your gq commands use pgFormatter automagically. For example if

    you are on the first line, typing:



            ESC+gq+G



    will format the entire file.



            ESC+gq+2j



    will format the next two line.



    Thanks to David Fetter for the hint.



    There is also the (Neo)vim plugin for formatting code for many file

    types that support pg_format to format SQL file type. Thanks to Anders

    Riutta for the patch to (Neo)vim.



  Formatting from Atom

    If you use atom as your favorite editor you can install the pg-formatter

    package which is a Node.js wrapper of pgFormatter.



    Features:



      * Format selected text or a whole file via keyboard shortcut or command.

      * Format SQL files on save.



    Installation:



    Search for pg-formatter in Atom UI or get it via command line:



        apm install pg-formatter



    Usage:



    Hit Ctrl-Alt-F to format selected text (or a whole file) or define your

    shortcut:



        'ctrl-alt-p': 'pg-formatter:format'



    Also, you can automatically format SQL files on save (disabled by

    default).



    You can download the package from url:



            https://atom.io/packages/pg-formatter



    the sources are available at https://github.com/gajus/pg-formatter



    Thanks to Alex Fedoseev for the atom package.



  Formatting from Visual Studio

    Thanks to Brady Holt a Visual Studio Code extension is available to

    formats PostgresSQL SQL using pgFormatter.



            https://marketplace.visualstudio.com/items?itemName=bradymholt.pgformatter



    For installation and use have a look at URL above.



  Prevent replacing code snippets

    Using -p or --placeholder command line option it is possible to keep

    code untouched by pgFormatter in your SQL queries. For example, in query

    like:



            SELECT * FROM projects WHERE projectnumber

                    IN <> AND username = <>;



    you may want pgFormatter to not interpret << and >> as bit-shift

    keywords and modify your code snippets. You can use a Perl regular

    expression to instruct pgFormatter to keep some part of the query

    untouched. For example:



            pg_format samples/ex9.sql -p '<<(?:.*)?>>'



    will not format the bit-shift like operators.



    If you would like to wrap queries after 60 characters (-w 60) and to

    apply that limit to comments as well (-C), then urls in comments may get

    wrapped. If you would prefer not to wrap urls, you can use a regular

    expression to avoid wrapping urls. For example:



            pg_format samples/ex62.sql -C -w 60 -p 'https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)'



    will wrap the queries and the comments, but not the urls.



  Prevent dynamic code formatting

    By default pgFormatter takes all code between single quote as string

    constant and do not perform any formatting on this code. It is common to

    use a string as code separator to avoid doubling single quote in dynamic

    code generation, in this case pgFormatter can fail to auto detect the

    code separator. By default it will search for any string after the

    EXECUTE keyword starting with dollar sign. If it can not auto detect

    your code separator you can use the command line option -S or

    --separator to set the code separator that must be used.



  Node.js thin-wrapper

    Gajus Kuizinas has written a Node.js wrapper for executing pgFormatter.

    You can find it at https://github.com/gajus/pg-formatter



  Customize CSS for the CGI output

    You can change the HTML style rendered through the default CSS style by

    creating a file named custom_css_file.css into the pgFormatter CGI

    script directory. The default CSS will be fully overridden by this

    custom file content. You have to look at the generated HTML output to

    get the default CSS code used.



  Using pgFormatter as an API

    You may use pgFormatter as an API by setting the 'Accept' HTTP header to

    value 'application/json' when calling it as a CGI app. In case you do

    not want to enable this feature, set "$self->{ 'enable_api' } = 0" in

    the "set_config" sub of lib/pgFormatter/CGI.pm.



AUTHORS

    pgFormatter is an original work from Gilles Darold with major code

    refactoring by Hubert depesz Lubaczewski.



COPYRIGHT

    Copyright 2012-2024 Gilles Darold. All rights reserved.



LICENSE

    pgFormatter is free software distributed under the PostgreSQL Licence.



    A modified version of the SQL::Beautify Perl Module is embedded in

    pgFormatter with copyright (C) 2009 by Jonas Kramer and is published

    under the terms of the Artistic License 2.0.