pg-minify

Minifies PostgreSQL scripts.

Features:

• Removes both /*multi-line*/ and --single-line comments
• Preserves special multi-line comments that start with /*!
• Concatenates multi-line strings into a single line with \n
• Fixes multi-line text, prefixing it with E where needed
• Removes redundant line gaps: line breaks, tabs and spaces
• Provides basic parsing and error reporting for invalid SQL
• Flattens the resulting script into a single line
• Optionally, compresses SQL for minimum space

This library is originally for PostgreSQL, though it works for MS-SQL and MySQL also.

Limitations:

• Multi-line quoted identifiers are not supported, throwing an error when encountered.
• Nested multi-line comments are not supported, throwing an error when encountered.

Installing

$ npm install pg-minify

Usage

var minify = require('pg-minify');

var sql = 'SELECT 1; -- comments';

minify(sql); //=> SELECT 1;

with compression (removes all unnecessary spaces):

var sql = 'SELECT * FROM "table" WHERE col = 123; -- comments';

minify(sql, {compress: true});
//=> SELECT*FROM"table"WHERE col=123;

The library's distribution includes TypeScript declarations.

Error Handling

SQLParsingError is thrown on failed SQL parsing:

try {
    minify('SELECT \'1');
} catch (error) {
    // error is minify.SQLParsingError instance
    // error.message:
    // Error parsing SQL at {line:1,col:8}: Unclosed text block.
}

API

minify(sql, [options]) ⇒ String

Minifies SQL into a single line, according to the options.

options.compress ⇒ Boolean

Compresses / uglifies the SQL to its bare minimum, by removing all unnecessary spaces.

• false (default) - keep minimum spaces, for easier read
• true - remove all unnecessary spaces

Testing

First, clone the repository and install DEV dependencies.

$ npm test

Testing with coverage:

$ npm run coverage

License

Copyright © 2018 Vitaly Tomilov; Released under the MIT license.