[TD-519] fix execute sql return

src/connector/python/linux/python2/taos/cinterface.py

@@ -149,6 +149,7 @@ class CTaosInterface(object):
     libtaos.taos_consume.restype = ctypes.c_void_p
     libtaos.taos_fetch_lengths.restype = ctypes.c_void_p
     libtaos.taos_free_result.restype = None
+    libtaos.taos_errno.restype = ctypes.c_int
 
     def __init__(self, config=None):
         '''

src/connector/python/linux/python2/taos/cursor.py

@@ -126,7 +126,8 @@ class TDengineCursor(object):
             with open(self._logfile, "a") as logfile:
                 logfile.write("%s;\n" % operation)
 
-        if self._result is not None:
+        errno = CTaosInterface.libtaos.taos_errno(self._result)
+        if errno == 0:
             if CTaosInterface.fieldsCount(self._result) == 0:
                 self._affected_rows += CTaosInterface.affectedRows(
                     self._result )

src/connector/python/linux/python3/taos/cinterface.py

@@ -149,6 +149,7 @@ class CTaosInterface(object):
     libtaos.taos_consume.restype = ctypes.c_void_p
     libtaos.taos_fetch_lengths.restype = ctypes.c_void_p
     libtaos.taos_free_result.restype = None
+    libtaos.taos_errno.restype = ctypes.c_int
 
     def __init__(self, config=None):
         '''

src/connector/python/linux/python3/taos/cursor.py

@@ -124,12 +124,12 @@ class TDengineCursor(object):
         # print("   >> Exec Query ({}): {}".format(localSeqNum, str(stmt)))
         self._result = CTaosInterface.query(self._connection._conn, stmt)
         # print("   << Query ({}) Exec Done".format(localSeqNum))
-
         if (self._logfile):
             with open(self._logfile, "a") as logfile:
                 logfile.write("%s;\n" % operation)
 
-        if self._result is not None:
+        errno = CTaosInterface.libtaos.taos_errno(self._result)
+        if errno == 0:
             if CTaosInterface.fieldsCount(self._result) == 0:
                 self._affected_rows += CTaosInterface.affectedRows(
                     self._result )

src/connector/python/windows/python2/taos/cinterface.py

@@ -149,6 +149,7 @@ class CTaosInterface(object):
     libtaos.taos_consume.restype = ctypes.c_void_p
     libtaos.taos_fetch_lengths.restype = ctypes.c_void_p
     libtaos.taos_free_result.restype = None
+    libtaos.taos_errno.restype = ctypes.c_int
 
     def __init__(self, config=None):
         '''

src/connector/python/windows/python2/taos/cursor.py

@@ -110,7 +110,8 @@ class TDengineCursor(object):
             pass
         
         self._result = CTaosInterface.query(self._connection._conn, stmt)
-        if self._result is not None:
+        errno = CTaosInterface.libtaos.taos_errno(self._result)
+        if errno == 0:
             if CTaosInterface.fieldsCount(self._result) == 0:
                 self._affected_rows += CTaosInterface.affectedRows(self._result)
                 return CTaosInterface.affectedRows(self._result )

src/connector/python/windows/python3/taos/cinterface.py

@@ -149,6 +149,7 @@ class CTaosInterface(object):
     libtaos.taos_consume.restype = ctypes.c_void_p
     libtaos.taos_fetch_lengths.restype = ctypes.c_void_p
     libtaos.taos_free_result.restype = None
+    libtaos.taos_errno.restype = ctypes.c_int
 
     def __init__(self, config=None):
         '''

src/connector/python/windows/python3/taos/cursor.py

@@ -110,7 +110,8 @@ class TDengineCursor(object):
             pass
         
         self._result = CTaosInterface.query(self._connection._conn, stmt)
-        if self._result is not None:
+        errno = CTaosInterface.libtaos.taos_errno(self._result)
+        if errno == 0:
             if CTaosInterface.fieldsCount(self._result) == 0:
                 self._affected_rows += CTaosInterface.affectedRows(self._result )
                 return CTaosInterface.affectedRows(self._result )