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This file is a manually maintained list of changes for each release. Feel free to add your changes here when sending pull requests. Also send corrections if you spot any mistakes.

? (unreleased)

  • Implement support for LOAD DATA LOCAL INFILE queries (#182).
  • Support OLD_PASSWORD() accounts like 0.9.x did. You should still upgrade any user accounts in your your MySQL user table that has short (16 byte) Password values. Connecting to those accounts is not secure. (#204)

v2.0.0-alpha2 (2012-05-31)

  • Specify escaping before for NaN / Infinity (they are as unquoted constants).
  • Support for unix domain socket connections (use: {socketPath: '...'}).
  • Fix type casting for NULL values for Date/Number fields
  • Add fields argument to query() as well as 'fields' event. This is similar to what was available in 0.9.x.
  • Support connecting to the sphinx searchd daemon as well as MariaDB (#199).
  • Implement long stack trace support, will be removed / disabled if the node core ever supports it natively.
  • Implement nestTables option for queries, allows fetching JOIN result sets with overlapping column names.
  • Fix ? placeholder mechanism for values containing '?' characters (#205).
  • Detect when connect() is called more than once on a connection and provide the user with a good error message for it (#204).
  • Switch to UTF8_GENERAL_CI (previously UTF8_UNICODE_CI) as the default charset for all connections to avoid strange MySQL performance issues (#200), and also make the charset user configurable.
  • Fix BLOB type casting for TINY_BLOG, MEDIUM_BLOB and LONG_BLOB.
  • Add support for sending and receiving large (> 16 MB) packets.

v2.0.0-alpha (2012-05-15)

This release is a rewrite. You should carefully test your application after upgrading to avoid problems. This release features many improvements, most importantly:

  • ~5x faster than v0.9.x for parsing query results
  • Support for pause() / resume() (for streaming rows)
  • Support for multiple statement queries
  • Support for stored procedures
  • Support for transactions
  • Support for binary columns (as blobs)
  • Consistent & well documented error handling
  • A new Connection class that has well defined semantics (unlike the old Client class).
  • Convenient escaping of objects / arrays that allows for simpler query construction
  • A significantly simpler code base
  • Many bug fixes & other small improvements (Closed 62 out of 66 GitHub issues)

Below are a few notes on the upgrade process itself:

The first thing you will run into is that the old Client class is gone and has been replaced with a less ambitious Connection class. So instead of mysql.createClient(), you now have to:

var mysql      = require('mysql');
var connection = mysql.createConnection({
  host     : 'localhost',
  user     : 'me',
  password : 'secret',

connection.query('SELECT 1', function(err, rows) {
  if (err) throw err;

  console.log('Query result: ', rows);


The new Connection class does not try to handle re-connects, please study the Server disconnects section in the new Readme.

Other than that, the interface has stayed very similar. Here are a few things to check out so:

  • BIGINT's are now cast into strings
  • Binary data is now cast to buffers
  • The 'row' event on the Query object is now called 'result' and will also be emitted for queries that produce an OK/Error response.
  • Error handling is consistently defined now, check the Readme
  • Escaping has become more powerful which may break your code if you are currently using objects to fill query placeholders.
  • Connections can now be established explicitly again, so you may wish to do so if you want to handle connection errors specifically.

That should be most of it, if you run into anything else, please send a patch or open an issue to improve this document.

v0.9.6 (2012-03-12)

  • Escape array values so they produce sql arrays (Roger Castells, Colin Smith)
  • docs: mention mysql transaction stop gap solution (Blake Miner)
  • docs: Mention affectedRows in FAQ (Michael Baldwin)

v0.9.5 (2011-11-26)

  • Fix #142 Driver stalls upon reconnect attempt that's immediately closed
  • Add travis build
  • Switch to urun as a test runner
  • Switch to utest for unit tests
  • Remove fast-or-slow dependency for tests
  • Split integration tests into individual files again

v0.9.4 (2011-08-31)

  • Expose package.json as mysql.PACKAGE (#104)

v0.9.3 (2011-08-22)

  • Set default client.user to root
  • Fix #91: Client#format should not mutate params array
  • Fix #94: TypeError in client.js
  • Parse decimals as string (vadimg)

v0.9.2 (2011-08-07)

  • The underlaying socket connection is now managed implicitly rather than explicitly.
  • Check the [upgrading guide][] for a full list of changes.

v0.9.1 (2011-02-20)

  • Fix issue #49 / client.escape() throwing exceptions on objects. (Nick Payne)
  • Drop < v0.4.x compatibility. From now on you need node v0.4.x to use this module.

Older releases

These releases were done before maintaining this file: