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@gethue/sql-formatter - npm

SQL Formatter is a JavaScript library for pretty-printing SQL queries. It started as a port of a PHP Library, but has since considerably diverged.

SQL formatter supports the following dialects:

• sql - Standard SQL
• mariadb - MariaDB
• mysql - MySQL
• postgresql - PostgreSQL
• db2 - IBM DB2
• plsql - Oracle PL/SQL
• n1ql - Couchbase N1QL
• redshift - Amazon Redshift
• spark - Spark
• tsql - SQL Server Transact-SQL

It does not support:

• Stored procedures.
• Changing of the delimiter type to something else than ;.

→ Try the demo.

Get the latest version from NPM:

npm install sql-formatter

import { format } from 'sql-formatter';

console.log(format('SELECT * FROM tbl'));

This will output:

You can also pass in configuration options:

format('SELECT * FROM tbl', {
  language: 'spark', // Defaults to "sql" (see the above list of supported dialects)
  indent: '    ', // Defaults to two spaces
  uppercase: bool, // Defaults to false (not safe to use when SQL dialect has case-sensitive identifiers)
  linesBetweenQueries: 2, // Defaults to 1,
  indentQuerySeparator: true, // Defaults to false
});

// Named placeholders
format("SELECT * FROM tbl WHERE foo = @foo", {
  params: {foo: "'bar'"}
}));

// Indexed placeholders
format("SELECT * FROM tbl WHERE foo = ?", {
  params: ["'bar'"]
}));

Both result in:

SELECT
  *
FROM
  tbl
WHERE
  foo = 'bar'

The CLI tool will be installed under sql-formatter and may be invoked via npx sql-formatter:

usage: sql-formatter [-h] [-o OUTPUT] [-l {db2,mariadb,mysql,n1ql,plsql,postgresql,redshift,spark,sql,tsql}]
                     [-i N | -t] [-u] [--lines-between-queries N] [--version] [FILE]

SQL Formatter

positional arguments:
  FILE                  Input SQL file (defaults to stdin)

optional arguments:
  -h, --help            show this help message and exit
  -o OUTPUT, --output OUTPUT
                        File to write SQL output (defaults to stdout)
  -l {db2,mariadb,mysql,n1ql,plsql,postgresql,redshift,spark,sql,tsql},
  --language {db2,mariadb,mysql,n1ql,plsql,postgresql,redshift,spark,sql,tsql}
                        SQL Formatter dialect (defaults to basic sql)
  -i N, --indent N      Number of spaces to indent query blocks (defaults to 2)
  -t, --tab-indent      Indent query blocks with tabs instead of spaces
  -u, --uppercase       Capitalize language keywords
  --lines-between-queries N
                        How many newlines to insert between queries (separated by ";")
  --version             show program's version number and exit

By default, the tool takes queries from stdin and processes them to stdout but one can also name an input file name or use the --output option.

echo 'select * from tbl where id = 3' | sql-formatter -u

SELECT
  *
FROM
  tbl
WHERE
  id = 3

If you don't use a module bundler, clone the repository, run npm install and grab a file from /dist directory to use inside a <script> tag. This makes SQL Formatter available as a global variable window.sqlFormatter.

Make sure to run all checks:

...and you're ready to poke us with a pull request.

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