Upgrade mysql and vitess

Signed-off-by: kuba-- <[email protected]>

Author: kuba--

Gopkg.lock

@@ -1,6 +1,6 @@
 [[constraint]]
   name = "gopkg.in/src-d/go-mysql-server.v0"
-  revision = "7cdd4325a65caf5fcef6c4482b4345045da172d1"
+  revision = "4a751c09d9fd0d59f790ad8edd28a9799fe669f8"
 
 [[constraint]]
   name = "github.com/jessevdk/go-flags"

Gopkg.toml

@@ -95,4 +95,4 @@ Also, if you want to retrieve values from a non common property, you can pass it
 
 ## Standard functions
 
-You can check standard functions in [`go-mysql-server` documentation](https://github.com/src-d/go-mysql-server/tree/7cdd4325a65caf5fcef6c4482b4345045da172d1#custom-functions).
+You can check standard functions in [`go-mysql-server` documentation](https://github.com/src-d/go-mysql-server/tree/4a751c09d9fd0d59f790ad8edd28a9799fe669f8#custom-functions).

docs/using-gitbase/functions.md

@@ -10,4 +10,4 @@ Note that you can create an index either **on one or more columns** or **on a si
 
 You can find some more examples in the [examples](./examples.md#create-an-index-for-columns-on-a-table) section.
 
-See [go-mysql-server](https://github.com/src-d/go-mysql-server/tree/7cdd4325a65caf5fcef6c4482b4345045da172d1#indexes) documentation for more details
+See [go-mysql-server](https://github.com/src-d/go-mysql-server/tree/4a751c09d9fd0d59f790ad8edd28a9799fe669f8#indexes) documentation for more details

docs/using-gitbase/indexes.md

@@ -1,3 +1,3 @@
 ## Supported clients
 
-To see the supported MySQL clients and examples about how to use them, take a look [here](https://github.com/src-d/go-mysql-server/blob/7cdd4325a65caf5fcef6c4482b4345045da172d1/SUPPORTED_CLIENTS.md).
+To see the supported MySQL clients and examples about how to use them, take a look [here](https://github.com/src-d/go-mysql-server/blob/4a751c09d9fd0d59f790ad8edd28a9799fe669f8/SUPPORTED_CLIENTS.md).

docs/using-gitbase/supported-clients.md

@@ -1,3 +1,3 @@
 ## Supported syntax
 
-To see the SQL subset currently supported take a look at [this list](https://github.com/src-d/go-mysql-server/blob/7cdd4325a65caf5fcef6c4482b4345045da172d1/SUPPORTED.md) from [src-d/go-mysql-server](https://github.com/src-d/go-mysql-server).
+To see the SQL subset currently supported take a look at [this list](https://github.com/src-d/go-mysql-server/blob/4a751c09d9fd0d59f790ad8edd28a9799fe669f8/SUPPORTED.md) from [src-d/go-mysql-server](https://github.com/src-d/go-mysql-server).