add UniqueIdentifier type for supporting mssql

type.go

@@ -69,15 +69,16 @@ var (
 	Enum = "ENUM"
 	Set  = "SET"
 
-	Char       = "CHAR"
-	Varchar    = "VARCHAR"
-	NVarchar   = "NVARCHAR"
-	TinyText   = "TINYTEXT"
-	Text       = "TEXT"
-	Clob       = "CLOB"
-	MediumText = "MEDIUMTEXT"
-	LongText   = "LONGTEXT"
-	Uuid       = "UUID"
+	Char             = "CHAR"
+	Varchar          = "VARCHAR"
+	NVarchar         = "NVARCHAR"
+	TinyText         = "TINYTEXT"
+	Text             = "TEXT"
+	Clob             = "CLOB"
+	MediumText       = "MEDIUMTEXT"
+	LongText         = "LONGTEXT"
+	Uuid             = "UUID"
+	UniqueIdentifier = "UNIQUEIDENTIFIER"
 
 	Date       = "DATE"
 	DateTime   = "DATETIME"
@@ -148,11 +149,12 @@ var (
 		Binary:    BLOB_TYPE,
 		VarBinary: BLOB_TYPE,
 
-		TinyBlob:   BLOB_TYPE,
-		Blob:       BLOB_TYPE,
-		MediumBlob: BLOB_TYPE,
-		LongBlob:   BLOB_TYPE,
-		Bytea:      BLOB_TYPE,
+		TinyBlob:         BLOB_TYPE,
+		Blob:             BLOB_TYPE,
+		MediumBlob:       BLOB_TYPE,
+		LongBlob:         BLOB_TYPE,
+		Bytea:            BLOB_TYPE,
+		UniqueIdentifier: BLOB_TYPE,
 
 		Bool: NUMERIC_TYPE,
 
@@ -291,7 +293,7 @@ func SQLType2Type(st SQLType) reflect.Type {
 		return reflect.TypeOf(float64(1))
 	case Char, Varchar, NVarchar, TinyText, Text, MediumText, LongText, Enum, Set, Uuid, Clob:
 		return reflect.TypeOf("")
-	case TinyBlob, Blob, LongBlob, Bytea, Binary, MediumBlob, VarBinary:
+	case TinyBlob, Blob, LongBlob, Bytea, Binary, MediumBlob, VarBinary, UniqueIdentifier:
 		return reflect.TypeOf([]byte{})
 	case Bool:
 		return reflect.TypeOf(true)