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+## 2.0.0 (July 14, 2016)
+
+* __BREAKING:__ A `UniqueConstraintViolationError` may now contain different values, depending on whether the violated constraint was a composite across multiple columns or not. For single-column `UNIQUE` constraints, the `value` and `column` properties will still be present as before; however, for a composite constraint, those properties will be undefined and `values` and `columns` will be set instead.
+* __Minor:__ Added support for detecting "undefined column" errors (as an `UndefinedColumnError`).
+* __Patch:__ Fixed some incorrect internal function names.
+
 ## 1.0.0 (November 11, 2016)
 
 Initial release.