diff --git a/src/connector/odbc/src/todbc_conv.c b/src/connector/odbc/src/todbc_conv.c
index 695201af5338977b302dc2fa2e4ae3b70e8acb69..c6ce6a29f60fb3d3ba7d8443325b7c4f24526f64 100644
--- a/src/connector/odbc/src/todbc_conv.c
+++ b/src/connector/odbc/src/todbc_conv.c
@@ -14,9 +14,10 @@
  */
 
 #include "todbc_conv.h"
-
 #include "todbc_util.h"
 
+#include "os.h"
+
 #include <errno.h>
 #include <limits.h>
 #include <stdio.h>
diff --git a/src/connector/odbc/src/todbc_conv.h b/src/connector/odbc/src/todbc_conv.h
index 4b326230f0d47b730472e4a92a9ddf62923de3dc..9753620ee21526572dd55573da3c5b8311cf178b 100644
--- a/src/connector/odbc/src/todbc_conv.h
+++ b/src/connector/odbc/src/todbc_conv.h
@@ -16,8 +16,7 @@
 #ifndef _todbc_conv_h_
 #define _todbc_conv_h_
 
-#include <inttypes.h>
-#include <sqltypes.h>
+#include "todbc_flex_workaround.h"
 #include <stddef.h>
 
 #include "iconv.h"
diff --git a/src/connector/odbc/src/todbc_flex_workaround.h b/src/connector/odbc/src/todbc_flex_workaround.h
new file mode 100644
index 0000000000000000000000000000000000000000..d6c79cf19a4cbc6dd155120f5b827d554a930421
--- /dev/null
+++ b/src/connector/odbc/src/todbc_flex_workaround.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _todbc_flex_workaround_h_
+#define _todbc_flex_workaround_h_
+
+#ifdef _MSC_VER
+#include <winsock2.h>
+#include <windows.h>
+#endif
+#ifndef INT8_MIN
+#include <stdint.h>
+#endif
+#include <sql.h>
+#include <sqlext.h>
+
+#endif // _todbc_flex_workaround_h_
+
diff --git a/src/connector/odbc/src/todbc_scanner.l b/src/connector/odbc/src/todbc_scanner.l
index 8e178aa366c94d3037d42fa25f0c0b0d1298c70a..4c7aa74f2cca315ac2bf1bc3a5721597b2533383 100644
--- a/src/connector/odbc/src/todbc_scanner.l
+++ b/src/connector/odbc/src/todbc_scanner.l
@@ -1,8 +1,18 @@
 %{
+#include <winsock2.h>
+#include <windows.h>
+#include <sql.h>
+
 #include "todbc_util.h"
 
 #include <stdio.h>
 
+#ifdef _MSC_VER
+#include "msvcLibgen.h"
+#define strncasecmp _strnicmp
+#define strcasecmp _stricmp
+#endif
+
 typedef struct params_s              params_t;
 struct params_s {
     char                *key;
@@ -68,6 +78,8 @@ do {                                                 \
 
 %option prefix="todbc_yy"
 %option extra-type="struct params_s *"
+%option nounistd
+%option never-interactive
 %option reentrant
 %option noyywrap
 %option noinput nounput
diff --git a/src/connector/odbc/src/todbc_util.c b/src/connector/odbc/src/todbc_util.c
index d462b37c1e531a960440b6961c65eb40d6f8fc5e..35f02bedd5d3c1e69a19f68f753f990e610cdc1f 100644
--- a/src/connector/odbc/src/todbc_util.c
+++ b/src/connector/odbc/src/todbc_util.c
@@ -17,9 +17,6 @@
 
 #include "iconv.h"
 
-#include <sql.h>
-#include <sqltypes.h>
-#include <sqlext.h>
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/src/connector/odbc/src/todbc_util.h b/src/connector/odbc/src/todbc_util.h
index 5f58ff13cefed71ca0e988cd45683876aed256a6..b987c633a22852593906c1d91559ab2ae8b555fe 100644
--- a/src/connector/odbc/src/todbc_util.h
+++ b/src/connector/odbc/src/todbc_util.h
@@ -16,10 +16,9 @@
 #ifndef _TODBC_UTIL_H_
 #define _TODBC_UTIL_H_
 
+#include "todbc_flex_workaround.h"
 #include "todbc_log.h"
 
-#include <stddef.h>
-#include <sql.h>
 
 const char* sql_sql_type(int type);
 const char* sql_c_type(int type);
diff --git a/src/connector/odbc/tests/CMakeLists.txt b/src/connector/odbc/tests/CMakeLists.txt
index 1649b45e02fd8474ea1964434d7417c4d186d897..d998527dc81398d590caf3e4a9eaa0e3d44f1dd3 100644
--- a/src/connector/odbc/tests/CMakeLists.txt
+++ b/src/connector/odbc/tests/CMakeLists.txt
@@ -9,5 +9,5 @@ ENDIF ()
 IF (TD_WINDOWS_64)
   AUX_SOURCE_DIRECTORY(. SRC)
   ADD_EXECUTABLE(tcodbc main.c)
-  TARGET_LINK_LIBRARIES(tcodbc odbc)
+  # TARGET_LINK_LIBRARIES(tcodbc odbc)
 ENDIF ()
diff --git a/src/connector/odbc/tests/main.c b/src/connector/odbc/tests/main.c
index 1321ade328c2c8aae2c93c72923ec2ec091a7108..2a0dca7a4d7e300773f7c77f8ab30302075efba8 100644
--- a/src/connector/odbc/tests/main.c
+++ b/src/connector/odbc/tests/main.c
@@ -1,4 +1,4 @@
-#include <libgen.h>
+#include "os.h"
 #include <sql.h>
 #include <sqlext.h>
 
@@ -423,7 +423,12 @@ int test_sqls_in_stmt(SQLHENV env, SQLHDBC conn, SQLHSTMT stmt, const char *sqls
     char *line = NULL;
     size_t len = 0;
 
-    ssize_t n = getline(&line, &len, f);
+    ssize_t n = 0;
+#ifdef _MSC_VER
+    n = taosGetlineImp(&line, &len, f);
+#else
+    n = getline(&line, &len, f);
+#endif
     if (n==-1) break;
 
     const char *p = NULL;