## 2.6
Compatibility for backend-specific upsert functionality.
A lucky contributor could add upsert to the MySQL backend now, i.e.:
INSERT ... ON DUPICATE ...
## 2.5
* changes for read/write typeclass split
## 2.3.0.1
Support usign default= for changing the id field type
## 2.3
* Distinguish between binary and non-binary strings in MySQL [#451](https://github.com/yesodweb/persistent/pull/451)
* Previously all string columns (VARCHAR, TEXT, etc.) were being returned from Persistent as `PersistByteString`s (i.e. as binary data). Persistent now checks character set information to determine if the value should be returned as `PersistText` or `PersistByteString`.
* This is a **breaking change** if your code is relying on a `PersistByteString` being returned for string-like MySQL values; persistent-mysql itself had several runtime errors that needed to be fixed because of this patch. High-level code dealing purely with `PersistEntities` should be unaffected.
## 2.2
* Update to persistent 2.2
## 2.1.3
* Added a `Show` instance for `MySQLConf`.
## 2.1.2.1
Documentation typo fix
## 2.1.2
Provide a `FromJSON` instance for `MySQLConf`.