diff --git a/src/connector/python/linux/python2/setup.py b/src/connector/python/linux/python2/setup.py
index dba234d7a4..4a829f36c4 100644
--- a/src/connector/python/linux/python2/setup.py
+++ b/src/connector/python/linux/python2/setup.py
@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="taos",
-    version="2.0.5",
+    version="2.0.6",
     author="Taosdata Inc.",
     author_email="support@taosdata.com",
     description="TDengine python client package",
diff --git a/src/connector/python/linux/python2/taos/__init__.py b/src/connector/python/linux/python2/taos/__init__.py
index 62e0536b6f..d41216a2dd 100644
--- a/src/connector/python/linux/python2/taos/__init__.py
+++ b/src/connector/python/linux/python2/taos/__init__.py
@@ -3,7 +3,6 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 
@@ -21,4 +20,4 @@ def connect(*args, **kwargs):
 
     @rtype: TDengineConnector
     """
-    return TDengineConnection(*args, **kwargs)
\ No newline at end of file
+    return TDengineConnection(*args, **kwargs)
diff --git a/src/connector/python/linux/python2/taos/cinterface.py b/src/connector/python/linux/python2/taos/cinterface.py
index 2b1b29ee31..168bd25b7c 100644
--- a/src/connector/python/linux/python2/taos/cinterface.py
+++ b/src/connector/python/linux/python2/taos/cinterface.py
@@ -37,7 +37,15 @@ def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, micro=False):
         return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
     else:
         return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
-    
+
+def _crow_tinyint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C tinyint row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+    else:
+        return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+
 def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C smallint row to python row
     """
@@ -46,6 +54,14 @@ def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
     else:
         return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
 
+def _crow_smallint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C smallint row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
+    else:
+        return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
+
 def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C int row to python row
     """
@@ -54,6 +70,14 @@ def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
     else:
         return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
 
+def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C int row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+    else:
+        return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+
 def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bigint row to python row
     """
@@ -62,6 +86,14 @@ def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
     else:
         return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
 
+def _crow_bigint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C bigint row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+    else:
+        return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+
 def _crow_float_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C float row to python row
     """
@@ -156,8 +188,12 @@ _CONVERT_FUNC = {
     FieldType.C_FLOAT : _crow_float_to_python,
     FieldType.C_DOUBLE : _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python
+    FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
+    FieldType.C_NCHAR : _crow_nchar_to_python,
+    FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
 }
 
 _CONVERT_FUNC_BLOCK = {
@@ -169,8 +205,12 @@ _CONVERT_FUNC_BLOCK = {
     FieldType.C_FLOAT : _crow_float_to_python,
     FieldType.C_DOUBLE : _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python_block,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python_block
+    FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
+    FieldType.C_NCHAR : _crow_nchar_to_python_block,
+    FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
 }
 
 # Corresponding TAOS_FIELD structure in C
@@ -298,7 +338,7 @@ class CTaosInterface(object):
             raise AttributeError("sql is expected as a string")
         # finally:
         #     CTaosInterface.libtaos.close(connection)
-      
+
     @staticmethod
     def affectedRows(result):
         """The affected rows after runing query
@@ -392,6 +432,7 @@ class CTaosInterface(object):
         else:
             return None, 0
         return blocks, abs(num_of_rows)
+
     @staticmethod
     def freeResult(result):
         CTaosInterface.libtaos.taos_free_result(result)
diff --git a/src/connector/python/linux/python2/taos/constants.py b/src/connector/python/linux/python2/taos/constants.py
index feb7050a40..07efebb669 100644
--- a/src/connector/python/linux/python2/taos/constants.py
+++ b/src/connector/python/linux/python2/taos/constants.py
@@ -18,13 +18,21 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
+    C_TINYINT_UNSIGNED = 12
+    C_SMALLINT_UNSIGNED = 13
+    C_INT_UNSIGNED = 14
+    C_BIGINT_UNSIGNED = 15
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02
     C_TINYINT_NULL = -128
+    C_TINYINT_UNSIGNED_NULL = 255
     C_SMALLINT_NULL = -32768
+    C_SMALLINT_UNSIGNED_NULL = 65535
     C_INT_NULL = -2147483648
+    C_INT_UNSIGNED_NULL = 4294967295
     C_BIGINT_NULL = -9223372036854775808
+    C_BIGINT_UNSIGNED_NULL = 18446744073709551615
     C_FLOAT_NULL = float('nan')
     C_DOUBLE_NULL = float('nan')
     C_BINARY_NULL = bytearray([int('0xff', 16)])
diff --git a/src/connector/python/linux/python2/taos/cursor.py b/src/connector/python/linux/python2/taos/cursor.py
index bc3b6c65d8..257046e2e0 100644
--- a/src/connector/python/linux/python2/taos/cursor.py
+++ b/src/connector/python/linux/python2/taos/cursor.py
@@ -158,11 +158,26 @@ class TDengineCursor(object):
         if (dataType.upper() == "TINYINT"):
             if (self._description[col][1] == FieldType.C_TINYINT):
                 return True
+        if (dataType.upper() == "TINYINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_TINYINT_UNSIGNED):
+                return True
+        if (dataType.upper() == "SMALLINT"):
+            if (self._description[col][1] == FieldType.C_SMALLINT):
+                return True
+        if (dataType.upper() == "SMALLINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_SMALLINT_UNSIGNED):
+                return True
         if (dataType.upper() == "INT"):
             if (self._description[col][1] == FieldType.C_INT):
                 return True
+        if (dataType.upper() == "INT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_INT_UNSIGNED):
+                return True
         if (dataType.upper() == "BIGINT"):
-            if (self._description[col][1] == FieldType.C_INT):
+            if (self._description[col][1] == FieldType.C_BIGINT):
+                return True
+        if (dataType.upper() == "BIGINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_BIGINT_UNSIGNED):
                 return True
         if (dataType.upper() == "FLOAT"):
             if (self._description[col][1] == FieldType.C_FLOAT):
diff --git a/src/connector/python/linux/python3/setup.py b/src/connector/python/linux/python3/setup.py
index e238372cd3..a865f5df85 100644
--- a/src/connector/python/linux/python3/setup.py
+++ b/src/connector/python/linux/python3/setup.py
@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="taos",
-    version="2.0.4",
+    version="2.0.5",
     author="Taosdata Inc.",
     author_email="support@taosdata.com",
     description="TDengine python client package",
diff --git a/src/connector/python/linux/python3/taos/__init__.py b/src/connector/python/linux/python3/taos/__init__.py
index 8cf095ea68..d41216a2dd 100644
--- a/src/connector/python/linux/python3/taos/__init__.py
+++ b/src/connector/python/linux/python3/taos/__init__.py
@@ -3,7 +3,6 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 
diff --git a/src/connector/python/linux/python3/taos/cinterface.py b/src/connector/python/linux/python3/taos/cinterface.py
index fdebe349fe..168bd25b7c 100644
--- a/src/connector/python/linux/python3/taos/cinterface.py
+++ b/src/connector/python/linux/python3/taos/cinterface.py
@@ -37,7 +37,15 @@ def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, micro=False):
         return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
     else:
         return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
-    
+
+def _crow_tinyint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C tinyint row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+    else:
+        return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+
 def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C smallint row to python row
     """
@@ -46,6 +54,14 @@ def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
     else:
         return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
 
+def _crow_smallint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C smallint row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
+    else:
+        return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
+
 def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C int row to python row
     """
@@ -54,6 +70,14 @@ def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
     else:
         return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
 
+def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C int row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+    else:
+        return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+
 def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bigint row to python row
     """
@@ -62,6 +86,14 @@ def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
     else:
         return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
 
+def _crow_bigint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C bigint row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+    else:
+        return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+
 def _crow_float_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C float row to python row
     """
@@ -156,8 +188,12 @@ _CONVERT_FUNC = {
     FieldType.C_FLOAT : _crow_float_to_python,
     FieldType.C_DOUBLE : _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python
+    FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
+    FieldType.C_NCHAR : _crow_nchar_to_python,
+    FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
 }
 
 _CONVERT_FUNC_BLOCK = {
@@ -169,8 +205,12 @@ _CONVERT_FUNC_BLOCK = {
     FieldType.C_FLOAT : _crow_float_to_python,
     FieldType.C_DOUBLE : _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python_block,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python_block
+    FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
+    FieldType.C_NCHAR : _crow_nchar_to_python_block,
+    FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
 }
 
 # Corresponding TAOS_FIELD structure in C
diff --git a/src/connector/python/linux/python3/taos/constants.py b/src/connector/python/linux/python3/taos/constants.py
index feb7050a40..07efebb669 100644
--- a/src/connector/python/linux/python3/taos/constants.py
+++ b/src/connector/python/linux/python3/taos/constants.py
@@ -18,13 +18,21 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
+    C_TINYINT_UNSIGNED = 12
+    C_SMALLINT_UNSIGNED = 13
+    C_INT_UNSIGNED = 14
+    C_BIGINT_UNSIGNED = 15
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02
     C_TINYINT_NULL = -128
+    C_TINYINT_UNSIGNED_NULL = 255
     C_SMALLINT_NULL = -32768
+    C_SMALLINT_UNSIGNED_NULL = 65535
     C_INT_NULL = -2147483648
+    C_INT_UNSIGNED_NULL = 4294967295
     C_BIGINT_NULL = -9223372036854775808
+    C_BIGINT_UNSIGNED_NULL = 18446744073709551615
     C_FLOAT_NULL = float('nan')
     C_DOUBLE_NULL = float('nan')
     C_BINARY_NULL = bytearray([int('0xff', 16)])
diff --git a/src/connector/python/linux/python3/taos/cursor.py b/src/connector/python/linux/python3/taos/cursor.py
index f972d2ff07..c25e1443d4 100644
--- a/src/connector/python/linux/python3/taos/cursor.py
+++ b/src/connector/python/linux/python3/taos/cursor.py
@@ -168,11 +168,26 @@ class TDengineCursor(object):
         if (dataType.upper() == "TINYINT"):
             if (self._description[col][1] == FieldType.C_TINYINT):
                 return True
+        if (dataType.upper() == "TINYINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_TINYINT_UNSIGNED):
+                return True
+        if (dataType.upper() == "SMALLINT"):
+            if (self._description[col][1] == FieldType.C_SMALLINT):
+                return True
+        if (dataType.upper() == "SMALLINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_SMALLINT_UNSIGNED):
+                return True
         if (dataType.upper() == "INT"):
             if (self._description[col][1] == FieldType.C_INT):
                 return True
+        if (dataType.upper() == "INT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_INT_UNSIGNED):
+                return True
         if (dataType.upper() == "BIGINT"):
-            if (self._description[col][1] == FieldType.C_INT):
+            if (self._description[col][1] == FieldType.C_BIGINT):
+                return True
+        if (dataType.upper() == "BIGINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_BIGINT_UNSIGNED):
                 return True
         if (dataType.upper() == "FLOAT"):
             if (self._description[col][1] == FieldType.C_FLOAT):
diff --git a/src/connector/python/osx/python3/setup.py b/src/connector/python/osx/python3/setup.py
index 098f786d62..a6b97f753c 100644
--- a/src/connector/python/osx/python3/setup.py
+++ b/src/connector/python/osx/python3/setup.py
@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="taos",
-    version="2.0.4",
+    version="2.0.5",
     author="Taosdata Inc.",
     author_email="support@taosdata.com",
     description="TDengine python client package",
diff --git a/src/connector/python/osx/python3/taos/__init__.py b/src/connector/python/osx/python3/taos/__init__.py
index 216214e097..d41216a2dd 100644
--- a/src/connector/python/osx/python3/taos/__init__.py
+++ b/src/connector/python/osx/python3/taos/__init__.py
@@ -3,7 +3,6 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0.4'
 threadsafety = 0
 paramstyle = 'pyformat'
 
diff --git a/src/connector/python/osx/python3/taos/cinterface.py b/src/connector/python/osx/python3/taos/cinterface.py
index 2cd54d536b..5f43668355 100644
--- a/src/connector/python/osx/python3/taos/cinterface.py
+++ b/src/connector/python/osx/python3/taos/cinterface.py
@@ -37,7 +37,15 @@ def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, micro=False):
         return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
     else:
         return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
-    
+
+def _crow_tinyint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C tinyint row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+    else:
+        return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+
 def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C smallint row to python row
     """
@@ -46,6 +54,14 @@ def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
     else:
         return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
 
+def _crow_smallint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C smallint row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
+    else:
+        return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
+
 def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C int row to python row
     """
@@ -54,6 +70,14 @@ def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
     else:
         return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
 
+def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C int row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+    else:
+        return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+
 def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bigint row to python row
     """
@@ -62,6 +86,14 @@ def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
     else:
         return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
 
+def _crow_bigint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C bigint row to python row
+    """
+    if num_of_rows > 0:
+        return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+    else:
+        return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+
 def _crow_float_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C float row to python row
     """
@@ -156,8 +188,12 @@ _CONVERT_FUNC = {
     FieldType.C_FLOAT : _crow_float_to_python,
     FieldType.C_DOUBLE : _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python
+    FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
+    FieldType.C_NCHAR : _crow_nchar_to_python,
+    FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
 }
 
 _CONVERT_FUNC_BLOCK = {
@@ -169,8 +205,12 @@ _CONVERT_FUNC_BLOCK = {
     FieldType.C_FLOAT : _crow_float_to_python,
     FieldType.C_DOUBLE : _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python_block,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python_block
+    FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
+    FieldType.C_NCHAR : _crow_nchar_to_python_block,
+    FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
 }
 
 # Corresponding TAOS_FIELD structure in C
diff --git a/src/connector/python/osx/python3/taos/constants.py b/src/connector/python/osx/python3/taos/constants.py
index feb7050a40..07efebb669 100644
--- a/src/connector/python/osx/python3/taos/constants.py
+++ b/src/connector/python/osx/python3/taos/constants.py
@@ -18,13 +18,21 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
+    C_TINYINT_UNSIGNED = 12
+    C_SMALLINT_UNSIGNED = 13
+    C_INT_UNSIGNED = 14
+    C_BIGINT_UNSIGNED = 15
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02
     C_TINYINT_NULL = -128
+    C_TINYINT_UNSIGNED_NULL = 255
     C_SMALLINT_NULL = -32768
+    C_SMALLINT_UNSIGNED_NULL = 65535
     C_INT_NULL = -2147483648
+    C_INT_UNSIGNED_NULL = 4294967295
     C_BIGINT_NULL = -9223372036854775808
+    C_BIGINT_UNSIGNED_NULL = 18446744073709551615
     C_FLOAT_NULL = float('nan')
     C_DOUBLE_NULL = float('nan')
     C_BINARY_NULL = bytearray([int('0xff', 16)])
diff --git a/src/connector/python/osx/python3/taos/cursor.py b/src/connector/python/osx/python3/taos/cursor.py
index f972d2ff07..c25e1443d4 100644
--- a/src/connector/python/osx/python3/taos/cursor.py
+++ b/src/connector/python/osx/python3/taos/cursor.py
@@ -168,11 +168,26 @@ class TDengineCursor(object):
         if (dataType.upper() == "TINYINT"):
             if (self._description[col][1] == FieldType.C_TINYINT):
                 return True
+        if (dataType.upper() == "TINYINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_TINYINT_UNSIGNED):
+                return True
+        if (dataType.upper() == "SMALLINT"):
+            if (self._description[col][1] == FieldType.C_SMALLINT):
+                return True
+        if (dataType.upper() == "SMALLINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_SMALLINT_UNSIGNED):
+                return True
         if (dataType.upper() == "INT"):
             if (self._description[col][1] == FieldType.C_INT):
                 return True
+        if (dataType.upper() == "INT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_INT_UNSIGNED):
+                return True
         if (dataType.upper() == "BIGINT"):
-            if (self._description[col][1] == FieldType.C_INT):
+            if (self._description[col][1] == FieldType.C_BIGINT):
+                return True
+        if (dataType.upper() == "BIGINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_BIGINT_UNSIGNED):
                 return True
         if (dataType.upper() == "FLOAT"):
             if (self._description[col][1] == FieldType.C_FLOAT):
diff --git a/src/connector/python/windows/python2/taos/__init__.py b/src/connector/python/windows/python2/taos/__init__.py
index 62e0536b6f..d41216a2dd 100644
--- a/src/connector/python/windows/python2/taos/__init__.py
+++ b/src/connector/python/windows/python2/taos/__init__.py
@@ -3,7 +3,6 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 
@@ -21,4 +20,4 @@ def connect(*args, **kwargs):
 
     @rtype: TDengineConnector
     """
-    return TDengineConnection(*args, **kwargs)
\ No newline at end of file
+    return TDengineConnection(*args, **kwargs)
diff --git a/src/connector/python/windows/python3/taos/__init__.py b/src/connector/python/windows/python3/taos/__init__.py
index c6dd929a6a..a7768a2c66 100644
--- a/src/connector/python/windows/python3/taos/__init__.py
+++ b/src/connector/python/windows/python3/taos/__init__.py
@@ -3,7 +3,6 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 
@@ -21,4 +20,4 @@ def connect(*args, **kwargs):
 
     @rtype: TDengineConnector
     """
-    return TDengineConnection(*args, **kwargs)
\ No newline at end of file
+    return TDengineConnection(*args, **kwargs)
diff --git a/tests/pytest/insert/basic_unsigned.py b/tests/pytest/insert/basic_unsigned.py
new file mode 100644
index 0000000000..c51c63160f
--- /dev/null
+++ b/tests/pytest/insert/basic_unsigned.py
@@ -0,0 +1,55 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+from util.log import *
+from util.cases import *
+from util.sql import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        tdSql.prepare()
+
+        ret = tdSql.execute('create table tb (ts timestamp, speed int unsigned)')
+
+        insertRows = 10
+        tdLog.info("insert %d rows" % (insertRows))
+        for i in range(0, insertRows):
+            ret = tdSql.execute(
+                'insert into tb values (now + %dm, %d)' %
+                (i, i))
+
+        tdLog.info("insert earlier data")
+        tdSql.execute('insert into tb values (now - 5m , 10)')
+        tdSql.execute('insert into tb values (now - 6m , 10)')
+        tdSql.execute('insert into tb values (now - 7m , 10)')
+        tdSql.execute('insert into tb values (now - 8m , 4294967294)')
+
+        tdSql.error('insert into tb values (now - 9m, -1)')
+        tdSql.error('insert into tb values (now - 9m, 4294967295)')
+
+        tdSql.query("select * from tb")
+        tdSql.checkRows(insertRows + 4)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())