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0.5.0 / 2012-09-21
* Breaking changes (well, not really)
* "document" (as in the second argument to #row) has been renamed to "setter"!
* Bug fixes
* If you say upsert({:name => 'Jerry', :color => 'red'}), make sure that it only affects rows really meeting those conditions
* Always sort selector and setter keys - i.e., column names - before doing anything with them
* Support PostgreSQL 9.1+
* Support MRI 1.8
* Enhancements
* Slightly faster benchmarks for SQlite3 and MySQL
* Slightly slower on PostgreSQL (probably because the merge function requires more arguments), but more accurate
* Slightly clearer code structure
* Use bind parameters instead of quoting for PostgreSQL and SQLite3.
* Provide Upsert.clear_database_functions(connection) (currently only for PostgreSQL)
* Don't subclass String for Upset::Binary... hopefully save some strcpy()s?
0.4.0 / 2012-09-04
* Bug fixes
* Don't raise TooBig - rely on Mysql2 to complain about oversized packets
* Enhancements
* Re-use PostgreSQL merge functions across connections, even outside of batch mode. Huzzah!
* For MySQL, increase speed for one-off upserts by not checking packet size
* Allow configuring Upsert.logger. Defaults to Rails.logger or Logger.new($stderr). If you set env var UPSERT_DEBUG=true then it will set log level to debug.
0.3.4 / 2012-07-03
* Bug fixes
* Allow upserting by auto-increment primary key (thanks @atandrau https://github.com/seamusabshere/upsert/issues/3)
* Enhancements
* Make setter an optional argument
0.3.3 / 2012-06-26
* Bug fixes
* Properly quote table names - don't assume that everybody has ANSI_QUOTES turned on in MySQL :)
0.3.2 / 2012-06-22
* Enhancements
* Make sure ::PGconn is recognized as ::PG::Connection (thanks @joevandyk https://github.com/seamusabshere/upsert/issues/2)
0.3.1 / 2012-06-21
* Bug fixes
* On PostgreSQL, stop nullifying columns that weren't even involved in the upsert
* On SQLite, properly join WHERE conditions with ' AND ' instead of ','
0.3.0 / 2012-06-21
* Enhancements
* Remove all the sampling - just keep a cumulative total of sql bytes as we build up an ON DUPLICATE KEY UPDATE query.
* Deprecate Upsert.stream in favor of Upsert.batch (but provide an alias for backwards compat)
0.2.2 / 2012-06-21
* Bug fixes
* Correct and simplify how sql length is calculated when batching MySQL upserts.
0.2.1 / 2012-06-21
* Enhancements
* Added support for Ruby 1.8.7