Add UniqueIdentifier type for supporting mssql

[p581581]

Add UniqueIdentifier type and recognize it as byte array.

[lunny]

Is UniqueIdentifier similar with UUID type? Maybe we should return string but not []byte?

[p581581]

Yeah, it is UUID type. But, for now, it parses incorrectly, if we recognize it as string. Also, UUID is a 128-bit number which would be faster than Varchar(36).

[lunny]

@p581581 I cannot confirm that. Have you run this patch successfully?

[p581581]

Yeah, it works fine, but still need to parse it to string when passing parameter.

[lunny]

@p581581 Thanks!