Version 0.9 - 2017-04-24
* Add distinct_on on Select
* Allow to use Select as Column of Select query
* Support Select without from clause

Version 0.8 - 2015-09-19
* Add DISTINCT qualifier to aggregate expressions
* Allow to order on select queries
* Add NULL ordering
* Use UPPER to simulate missing ILIKE
* Add CURRENT_DATE function
* Fix DateTrunc function name
* Add no_boolean Flavor
* Add converter format2numeric
* Add rownum limit style
* Add no_as Flavor

Version 0.7 - 2015-05-19
* Fix WINDOW and HAVING params order in Select
* Add window functions
* Add filter and within group to aggregate
* Add limitstyle with 'offset' and 'limit'
* Add Lateral

Version 0.6 - 2015-02-05
* Fix Delete query under multithread
* Add missing quote for with query name

Version 0.5 - 2015-01-29
* Add schema
* Add Common Table Expression
* Escape Mod operator '%' with format paramstyle
* Deprecate Interesect in favor of Intersect
* Add Values

Version 0.4 - 2014-08-03
* Fix Mapping in Trim function
* Add __truediv__ alias of __div__ for Python3
* Fix For tables setter when tables is not a list
* Allow to add Table to existing From list
* Fix Select with for_ clause
* Add Null alias for None
* Add missing format of operand in Unary operator

Version 0.3 - 2014-01-31
* Add returning to Update
* Add missing params for returning
* Add columns definitions to Function
* Fix AtTimeZone mapping

Version 0.2 - 2013-09-18
* Fix usage mixture between Div operator and function
* Add array support in operators

Version 0.1 - 2013-08-28
* Initial release
