diff --git a/src/connector/odbc/src/todbc.c b/src/connector/odbc/src/todbc.c
index 7812a991ef4fafc5a32bcee2651aa2a99315f4ea..1ba5f1ac16b0765cf3d6cf66be480b68d71cb36f 100644
--- a/src/connector/odbc/src/todbc.c
+++ b/src/connector/odbc/src/todbc.c
@@ -42,12 +42,18 @@ do {
   obj->err.err_no = eno;                                                                                  \
   const char* estr = tstrerror(eno);                                                                      \
   if (!estr) estr = "Unknown error";                                                                      \
-  int n = snprintf(NULL, 0, "%s: @[%d][TSDB:%x]" err_fmt "", estr, __LINE__, eno, ##__VA_ARGS__);         \
+  int n = snprintf(NULL, 0, "[TSDB:%x]%s: @%s[%d]" err_fmt "",                                            \
+                   eno, estr,                                                                             \
+                   basename((char*)__FILE__), __LINE__,                                                   \
+                   ##__VA_ARGS__);                                                                        \
   if (n<0) break;                                                                                         \
   char *err_str = (char*)realloc(obj->err.err_str, n+1);                                                  \
   if (!err_str) break;                                                                                    \
   obj->err.err_str = err_str;                                                                             \
-  snprintf(obj->err.err_str, n+1, "%s: @[%d][TSDB:%x]" err_fmt "", estr, __LINE__, eno, ##__VA_ARGS__);   \
+  snprintf(obj->err.err_str, n+1, "[TSDB:%x]%s: @%s[%d]" err_fmt "",                                      \
+           eno, estr,                                                                                     \
+           basename((char*)__FILE__), __LINE__,                                                           \
+           ##__VA_ARGS__);                                                                                \
   snprintf((char*)obj->err.sql_state, sizeof(obj->err.sql_state), "%s", sqlstate);                        \
 } while (0)
 
@@ -410,6 +416,19 @@ static SQLRETURN doSQLConnect(SQLHDBC ConnectionHandle,
     return SQL_ERROR;
   }
 
+  NameLength1 = (NameLength1==SQL_NTS) ? strlen((const char*)ServerName) : NameLength1;
+  NameLength2 = (NameLength2==SQL_NTS) ? strlen((const char*)UserName) : NameLength2;
+  NameLength3 = (NameLength3==SQL_NTS) ? strlen((const char*)Authentication) : NameLength3;
+
+  if (NameLength1 < 0 || NameLength2 < 0 || NameLength3 < 0) {
+    SET_ERROR(conn, "HY090", TSDB_CODE_ODBC_BAD_ARG, "");
+    return SQL_ERROR;
+  }
+  if (NameLength1>SQL_MAX_DSN_LENGTH) {
+    SET_ERROR(conn, "HY090", TSDB_CODE_ODBC_BAD_ARG, "");
+    return SQL_ERROR;
+  }
+
   const char *serverName = SDUP(ServerName,     NameLength1);
   const char *userName   = SDUP(UserName,       NameLength2);
   const char *auth       = SDUP(Authentication, NameLength3);
diff --git a/src/connector/odbc/src/todbc_conv.c b/src/connector/odbc/src/todbc_conv.c
index 0b8b35bfd5395726bbf78ec37c516238ab9c7818..bbb59c53adeb0216e559764c1986a555905f5874 100644
--- a/src/connector/odbc/src/todbc_conv.c
+++ b/src/connector/odbc/src/todbc_conv.c
@@ -52,6 +52,20 @@ static void buf_clean(buf_t *buf) {
   }
 }
 
+const char* tsdb_conv_code_str(TSDB_CONV_CODE code) {
+  switch (code) {
+    case TSDB_CONV_OK:                 return "TSDB_CONV_OK";
+    case TSDB_CONV_OOM:                return "TSDB_CONV_OOM";
+    case TSDB_CONV_OOR:                return "TSDB_CONV_OOR";
+    case TSDB_CONV_TRUNC_FRACTION:     return "TSDB_CONV_TRUNC_FRACTION";
+    case TSDB_CONV_TRUNC:              return "TSDB_CONV_TRUNC";
+    case TSDB_CONV_CHAR_NOT_NUM:       return "TSDB_CONV_CHAR_NOT_NUM";
+    case TSDB_CONV_GENERAL:            return "TSDB_CONV_GENERAL";
+    case TSDB_CONV_BAD_CHAR:           return "TSDB_CONV_BAD_CHAR";
+    default: return "UNKNOWN";
+  };
+}
+
 TSDB_CONV_CODE tsdb_iconv_conv(iconv_t cnv, const unsigned char *src, size_t *slen, unsigned char *dst, size_t *dlen) {
   if(cnv == (iconv_t)-1) return TSDB_CONV_GENERAL;
 
diff --git a/src/connector/odbc/src/todbc_conv.h b/src/connector/odbc/src/todbc_conv.h
index 8a247818f1e6c6491e3f62a38e8cd4f2f3fac7fd..4b326230f0d47b730472e4a92a9ddf62923de3dc 100644
--- a/src/connector/odbc/src/todbc_conv.h
+++ b/src/connector/odbc/src/todbc_conv.h
@@ -34,6 +34,8 @@ typedef enum {
   TSDB_CONV_BAD_CHAR,
 } TSDB_CONV_CODE;
 
+const char* tsdb_conv_code_str(TSDB_CONV_CODE code);
+
 TSDB_CONV_CODE tsdb_iconv_conv(iconv_t cnv, const unsigned char *src, size_t *slen, unsigned char *dst, size_t *dlen);
 
 
diff --git a/src/connector/odbc/src/todbc_log.h b/src/connector/odbc/src/todbc_log.h
new file mode 100644
index 0000000000000000000000000000000000000000..ff0409fef6ccc01fb2173905208833983c7833f9
--- /dev/null
+++ b/src/connector/odbc/src/todbc_log.h
@@ -0,0 +1,44 @@
+/*
+ * 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_log_h_
+#define _todbc_log_h_
+
+#include <libgen.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define D(fmt, ...)                                              \
+  fprintf(stderr,                                                \
+          "%s[%d]:%s() " fmt "\n",                               \
+          basename((char*)__FILE__), __LINE__, __func__,         \
+          ##__VA_ARGS__)
+
+#define DASSERT(statement)                                       \
+do {                                                             \
+  if (statement) break;                                          \
+  D("Assertion failure: %s", #statement);                        \
+  abort();                                                       \
+} while (0)
+
+#define DASSERTX(statement, fmt, ...)                                \
+do {                                                                 \
+  if (statement) break;                                              \
+  D("Assertion failure: %s, " fmt "", #statement, ##__VA_ARGS__);    \
+  abort();                                                           \
+} while (0)
+
+#endif // _todbc_log_h_
+
diff --git a/src/connector/odbc/src/todbc_util.h b/src/connector/odbc/src/todbc_util.h
index a1c32768efee3629859bc1cb79986afa3a721184..5f58ff13cefed71ca0e988cd45683876aed256a6 100644
--- a/src/connector/odbc/src/todbc_util.h
+++ b/src/connector/odbc/src/todbc_util.h
@@ -16,32 +16,11 @@
 #ifndef _TODBC_UTIL_H_
 #define _TODBC_UTIL_H_
 
-#include <libgen.h>
+#include "todbc_log.h"
+
 #include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
 #include <sql.h>
 
-#define D(fmt, ...)                                              \
-  fprintf(stderr,                                                \
-          "%s[%d]:%s() " fmt "\n",                               \
-          basename((char*)__FILE__), __LINE__, __func__,         \
-          ##__VA_ARGS__)
-
-#define DASSERT(statement)                                       \
-do {                                                             \
-  if (statement) break;                                          \
-  D("Assertion failure: %s", #statement);                        \
-  abort();                                                       \
-} while (0)
-
-#define DASSERTX(statement, fmt, ...)                                \
-do {                                                                 \
-  if (statement) break;                                              \
-  D("Assertion failure: %s, " fmt "", #statement, ##__VA_ARGS__);    \
-  abort();                                                           \
-} while (0)
-
 const char* sql_sql_type(int type);
 const char* sql_c_type(int type);
 
diff --git a/src/connector/odbc/tests/main.c b/src/connector/odbc/tests/main.c
index 1ac9b71369e8a526b051008b9379fdda4b6a5e77..0d42da985de8da9d2bfa0d51a3ac13624e0e5a03 100644
--- a/src/connector/odbc/tests/main.c
+++ b/src/connector/odbc/tests/main.c
@@ -1,3 +1,4 @@
+#include <libgen.h>
 #include <sql.h>
 #include <sqlext.h>
 
@@ -5,11 +6,20 @@
 #include <string.h>
 
 #include "os.h"
+#include "../src/todbc_log.h"
 
 // static const char *dsn = "TAOS_DSN";
 // static const char *uid = "root";
 // static const char *pwd = "taosdata";
 
+#define CHK_TEST(statement)                       \
+do {                                              \
+  D("testing: %s", #statement);                   \
+  int r = (statement);                            \
+  if (r) return 1;                                \
+} while (0);
+
+
 typedef struct data_s            data_t;
 struct data_s {
   int64_t                 ts;
@@ -37,7 +47,7 @@ static const char *pro_stmts[] = {
   // "drop database db"
 };
 
-#define CHK_RESULT(r, ht, h)                                                    \
+#define CHK_RESULT(r, ht, h, fmt, ...)                                          \
 do {                                                                            \
   if (r==0) break;                                                              \
   SQLCHAR      ss[10];                                                          \
@@ -48,23 +58,124 @@ do {
   es[0] = '\0';                                                                 \
   SQLRETURN ret = SQLGetDiagRec(ht, h, 1, ss, &ne, es, sizeof(es), &n);         \
   if (ret) break;                                                               \
-  fprintf(stderr, "%s%s\n", ss, es);                                            \
+  D("[%s]%s: " fmt "", ss, es, ##__VA_ARGS__);                                  \
 } while (0)
 
+static int open_connect(const char *dsn, const char *uid, const char *pwd, SQLHENV *pEnv, SQLHDBC *pConn) {
+  SQLRETURN r;
+  SQLHENV env = {0};
+  SQLHDBC conn = {0};
+  r = SQLAllocEnv(&env);
+  if (r!=SQL_SUCCESS) return 1;
+  do {
+    r = SQLAllocConnect(env, &conn);
+    CHK_RESULT(r, SQL_HANDLE_ENV, env, "");
+    if (r!=SQL_SUCCESS) break;
+    do {
+      r = SQLConnect(conn, (SQLCHAR*)dsn, strlen(dsn),
+                           (SQLCHAR*)uid, strlen(uid),
+                           (SQLCHAR*)pwd, strlen(pwd));
+      CHK_RESULT(r, SQL_HANDLE_DBC, conn, "");
+      if (r==SQL_SUCCESS) {
+        *pEnv  = env;
+        *pConn = conn;
+        return 0;
+      }
+    } while (0);
+    SQLFreeConnect(conn);
+  } while (0);
+  SQLFreeEnv(env);
+
+  return 1;
+}
+
+static int open_driver_connect(const char *connstr, SQLHENV *pEnv, SQLHDBC *pConn) {
+  SQLRETURN r;
+  SQLHENV env = {0};
+  SQLHDBC conn = {0};
+  r = SQLAllocEnv(&env);
+  if (r!=SQL_SUCCESS) return 1;
+  do {
+    r = SQLAllocConnect(env, &conn);
+    CHK_RESULT(r, SQL_HANDLE_ENV, env, "");
+    if (r!=SQL_SUCCESS) break;
+    do {
+      SQLCHAR buf[4096];
+      SQLSMALLINT blen = 0;
+      SQLHDBC         ConnectionHandle      = conn;
+      SQLHWND         WindowHandle          = NULL;
+      SQLCHAR *       InConnectionString    = (SQLCHAR*)connstr;
+      SQLSMALLINT     StringLength1         = strlen(connstr);
+      SQLCHAR *       OutConnectionString   = buf;
+      SQLSMALLINT     BufferLength          = sizeof(buf);
+      SQLSMALLINT *   StringLength2Ptr      = &blen;
+      SQLUSMALLINT    DriverCompletion      = SQL_DRIVER_NOPROMPT;
+      r = SQLDriverConnect(ConnectionHandle, WindowHandle, InConnectionString,
+                           StringLength1, OutConnectionString, BufferLength,
+                           StringLength2Ptr, DriverCompletion);
+      CHK_RESULT(r, SQL_HANDLE_DBC, conn, "");
+      if (r==SQL_SUCCESS) {
+        *pEnv  = env;
+        *pConn = conn;
+        return 0;
+      }
+    } while (0);
+    SQLFreeConnect(conn);
+  } while (0);
+  SQLFreeEnv(env);
+
+  return 1;
+}
 static int do_statement(SQLHSTMT stmt, const char *statement) {
   SQLRETURN r = 0;
   do {
-    fprintf(stderr, "prepare [%s]\n", statement);
-    r = SQLPrepare(stmt, (SQLCHAR*)statement, strlen(statement));
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    r = SQLExecDirect(stmt, (SQLCHAR*)statement, SQL_NTS);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: [%s]", statement);
     if (r) break;
-    fprintf(stderr, "execute [%s]\n", statement);
-    r = SQLExecute(stmt);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    SQLSMALLINT cols = 0;
+    r = SQLNumResultCols(stmt, &cols);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "");
     if (r) break;
-    fprintf(stderr, "done\n");
+    if (cols <= 0) break;
+    char buf[4096];
+    while (1) {
+      SQLRETURN r = SQLFetch(stmt);
+      if (r==SQL_NO_DATA) break;
+      CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "");
+      for (size_t i=0; i<cols; ++i) {
+        SQLLEN soi = 0;
+        r = SQLGetData(stmt, i+1, SQL_C_CHAR, buf, sizeof(buf), &soi);
+        CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "");
+        if (r) {
+          if (r!=SQL_SUCCESS_WITH_INFO) {
+            if (i>0) fprintf(stdout, "\n");
+            return r;
+          }
+        }
+        if (soi==SQL_NULL_DATA) {
+          fprintf(stdout, "%snull", i==0?"":",");
+        } else {
+          fprintf(stdout, "%s\"%s\"", i==0?"":",", buf);
+        }
+      }
+      fprintf(stdout, "\n");
+    }
+
+    // r = SQLFetch(stmt);
+    // if (r==SQL_NO_DATA) {
+    //   D("..........");
+    //   r = SQL_SUCCESS;
+    //   break;
+    // }
+    // CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "");
+    // if (r) break;
+    // r = SQLPrepare(stmt, (SQLCHAR*)statement, strlen(statement));
+    // CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "");
+    // if (r) break;
+    // r = SQLExecute(stmt);
+    // CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
+    // if (r) break;
   } while (0);
-  fprintf(stderr, "r: [%x][%d]\n", r, r);
   return r;
 }
 
@@ -77,155 +188,344 @@ static int do_insert(SQLHSTMT stmt, data_t data) {
   int ignored = 0;
 
   do {
-    fprintf(stderr, "prepare [%s]\n", statement);
     r = SQLPrepare(stmt, (SQLCHAR*)statement, strlen(statement));
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "bind 1 [%s]\n", statement);
     r = SQLBindParameter(stmt, 1, SQL_PARAM_INPUT, SQL_C_SBIGINT, SQL_TIMESTAMP, ignored, ignored, &data.ts, ignored, NULL);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "bind 2 [%s]\n", statement);
     r = SQLBindParameter(stmt, 2, SQL_PARAM_INPUT, SQL_C_BIT, SQL_BIT, ignored, ignored, &data.b, ignored, NULL);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "bind 3 [%s]\n", statement);
     r = SQLBindParameter(stmt, 3, SQL_PARAM_INPUT, SQL_C_TINYINT, SQL_TINYINT, ignored, ignored, &data.v1, ignored, NULL);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "bind 4 [%s]\n", statement);
     r = SQLBindParameter(stmt, 4, SQL_PARAM_INPUT, SQL_C_SHORT, SQL_SMALLINT, ignored, ignored, &data.v2, ignored, NULL);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "bind 5 [%s]\n", statement);
     r = SQLBindParameter(stmt, 5, SQL_PARAM_INPUT, SQL_C_LONG, SQL_INTEGER, ignored, ignored, &data.v4, ignored, NULL);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "bind 6 [%s]\n", statement);
     r = SQLBindParameter(stmt, 6, SQL_PARAM_INPUT, SQL_C_SBIGINT, SQL_BIGINT, ignored, ignored, &data.v8, ignored, NULL);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "bind 7 [%s]\n", statement);
     r = SQLBindParameter(stmt, 7, SQL_PARAM_INPUT, SQL_C_FLOAT, SQL_FLOAT, ignored, ignored, &data.f4, ignored, NULL);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "bind 8 [%s]\n", statement);
     r = SQLBindParameter(stmt, 8, SQL_PARAM_INPUT, SQL_C_DOUBLE, SQL_DOUBLE, ignored, ignored, &data.f8, ignored, NULL);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "bind 9 [%s]\n", statement);
     lbin = SQL_NTS;
     r = SQLBindParameter(stmt, 9, SQL_PARAM_INPUT, SQL_C_BINARY, SQL_VARBINARY, sizeof(data.bin)-1, ignored, &data.bin, ignored, &lbin);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "bind 10 [%s]\n", statement);
     lblob = SQL_NTS;
     r = SQLBindParameter(stmt, 10, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_VARCHAR, sizeof(data.blob)-1, ignored, &data.blob, ignored, &lblob);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
-    fprintf(stderr, "execute [%s]\n", statement);
     r = SQLExecute(stmt);
-    CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
+    CHK_RESULT(r, SQL_HANDLE_STMT, stmt, "statement: %s", statement);
     if (r) break;
 
     // ts += 1;
     // v  = 2;
-    // fprintf(stderr, "execute [%s]\n", statement);
     // r = SQLExecute(stmt);
     // if (r) break;
-
-    fprintf(stderr, "done\n");
   } while (0);
-  fprintf(stderr, "r: [%x][%d]\n", r, r);
   return r;
 }
 
-int main(int argc, char *argv[]) {
-  if (argc < 4) return 1;
-  const char *dsn = argv[1];
-  const char *uid = argv[2];
-  const char *pwd = argv[3];
-  SQLRETURN r;
+static int test1(const char *dsn, const char *uid, const char *pwd) {
+  SQLRETURN r = SQL_SUCCESS;
   SQLHENV env = {0};
   SQLHDBC conn = {0};
-  r = SQLAllocEnv(&env);
-  if (r!=SQL_SUCCESS) return 1;
+  int n = open_connect(dsn, uid, pwd, &env, &conn);
+  if (n) return 1;
+
   do {
-    r = SQLAllocConnect(env, &conn);
-    CHK_RESULT(r, SQL_HANDLE_ENV, env);
+    SQLHSTMT stmt = {0};
+    r = SQLAllocHandle(SQL_HANDLE_STMT, conn, &stmt);
     if (r!=SQL_SUCCESS) break;
     do {
-      r = SQLConnect(conn, (SQLCHAR*)dsn, strlen(dsn),
-                           (SQLCHAR*)uid, strlen(uid),
-                           (SQLCHAR*)pwd, strlen(pwd));
-      CHK_RESULT(r, SQL_HANDLE_DBC, conn);
-      if (r!=SQL_SUCCESS) break;
+      if (do_statement(stmt, "drop database if exists db")) {
+        r = SQL_ERROR;
+        break;
+      }
+      for (size_t i=0; i<sizeof(pre_stmts)/sizeof(pre_stmts[0]); ++i) {
+        r = do_statement(stmt, pre_stmts[i]);
+        if (r!=SQL_SUCCESS) break;
+      }
       do {
+        data_t       data = {0};
+        data.ts      = 1591060628001;
+        data.b       = 1;
+        data.v1      = 127;
+        data.v2      = 32767;
+        data.v4      = 2147483647;
+        data.v8      = 9223372036854775807;
+        data.f4      = 123.456;
+        data.f8      = 9999999.999999;
+        memset(data.bin, 0, sizeof(data.bin));
+        memset(data.blob, 0, sizeof(data.blob));
+        snprintf(data.bin, sizeof(data.bin), "hel我lo");
+        snprintf(data.blob, sizeof(data.blob), "world");
+        snprintf(data.blob, sizeof(data.blob), "wo人rld");
         SQLHSTMT stmt = {0};
         r = SQLAllocHandle(SQL_HANDLE_STMT, conn, &stmt);
         if (r!=SQL_SUCCESS) break;
         do {
-          do_statement(stmt, "drop database db");
-          for (size_t i=0; i<sizeof(pre_stmts)/sizeof(pre_stmts[0]); ++i) {
-            r = do_statement(stmt, pre_stmts[i]);
-            if (r!=SQL_SUCCESS) break;
-          }
-          do {
-            data_t       data = {0};
-            data.ts      = 1591060628001;
-            data.b       = 1;
-            data.v1      = 127;
-            data.v2      = 32767;
-            data.v4      = 2147483647;
-            data.v8      = 9223372036854775807;
-            data.f4      = 123.456;
-            data.f8      = 9999999.999999;
-            memset(data.bin, 0, sizeof(data.bin));
-            memset(data.blob, 0, sizeof(data.blob));
-            snprintf(data.bin, sizeof(data.bin), "hel我lo");
-            snprintf(data.blob, sizeof(data.blob), "world");
-            snprintf(data.blob, sizeof(data.blob), "wo人rld");
-            SQLHSTMT stmt = {0};
-            r = SQLAllocHandle(SQL_HANDLE_STMT, conn, &stmt);
-            if (r!=SQL_SUCCESS) break;
-            do {
-              r = do_insert(stmt, data);
-              if (r!=SQL_SUCCESS) break;
-            } while (0);
-            SQLFreeHandle(SQL_HANDLE_STMT, stmt);
-
-            // r = SQLAllocHandle(SQL_HANDLE_STMT, conn, &stmt);
-            // if (r!=SQL_SUCCESS) break;
-            // do {
-            //   r = do_insert(stmt, ts++, v++);
-            //   if (r!=SQL_SUCCESS) break;
-            // } while (0);
-            // SQLFreeHandle(SQL_HANDLE_STMT, stmt);
-          } while (0);
+          r = do_insert(stmt, data);
           if (r!=SQL_SUCCESS) break;
-          for (size_t i=0; i<sizeof(pro_stmts)/sizeof(pro_stmts[0]); ++i) {
-            r = do_statement(stmt, pro_stmts[i]);
-            if (r!=SQL_SUCCESS) break;
-          }
         } while (0);
         SQLFreeHandle(SQL_HANDLE_STMT, stmt);
+
+        // r = SQLAllocHandle(SQL_HANDLE_STMT, conn, &stmt);
+        // if (r!=SQL_SUCCESS) break;
+        // do {
+        //   r = do_insert(stmt, ts++, v++);
+        //   if (r!=SQL_SUCCESS) break;
+        // } while (0);
+        // SQLFreeHandle(SQL_HANDLE_STMT, stmt);
       } while (0);
-      SQLDisconnect(conn);
+      if (r!=SQL_SUCCESS) break;
+      for (size_t i=0; i<sizeof(pro_stmts)/sizeof(pro_stmts[0]); ++i) {
+        r = do_statement(stmt, pro_stmts[i]);
+        if (r!=SQL_SUCCESS) break;
+      }
     } while (0);
-    SQLFreeConnect(conn);
+    SQLFreeHandle(SQL_HANDLE_STMT, stmt);
   } while (0);
+  SQLDisconnect(conn);
+  SQLFreeConnect(conn);
   SQLFreeEnv(env);
+
   return r ? 1 : 0;
 }
 
+int test_statements(const char *dsn, const char *uid, const char *pwd, const char **statements) {
+  SQLRETURN r = SQL_SUCCESS;
+  SQLHENV env = {0};
+  SQLHDBC conn = {0};
+  int n = open_connect(dsn, uid, pwd, &env, &conn);
+  if (n) return 1;
+  do {
+    SQLHSTMT stmt = {0};
+    r = SQLAllocHandle(SQL_HANDLE_STMT, conn, &stmt);
+    if (r!=SQL_SUCCESS) break;
+    const char **p = statements;
+    while (*p) {
+      if (do_statement(stmt, *p)) {
+        r = SQL_ERROR;
+        break;
+      }
+      ++p;
+    }
+    SQLFreeHandle(SQL_HANDLE_STMT, stmt);
+  } while (0);
+  SQLDisconnect(conn);
+  SQLFreeConnect(conn);
+  SQLFreeEnv(env);
+  return r ? 1 : 0;
+}
+
+int test_driver_connect(const char *connstr) {
+  SQLRETURN r = SQL_SUCCESS;
+  SQLHENV env = {0};
+  SQLHDBC conn = {0};
+  int n = open_driver_connect(connstr, &env, &conn);
+  if (n) return 1;
+  SQLDisconnect(conn);
+  SQLFreeConnect(conn);
+  SQLFreeEnv(env);
+  return r ? 1 : 0;
+}
+
+int create_statement(SQLHENV env, SQLHDBC conn, SQLHSTMT *pStmt) {
+  SQLHSTMT stmt = {0};
+  SQLRETURN r = SQLAllocHandle(SQL_HANDLE_STMT, conn, &stmt);
+  CHK_RESULT(r, SQL_HANDLE_DBC, conn, "");
+  if (r==SQL_SUCCESS) {
+    *pStmt = stmt;
+    return 0;
+  }
+  if (r==SQL_SUCCESS_WITH_INFO) {
+    SQLFreeHandle(SQL_HANDLE_STMT, stmt);
+  }
+  return 1;
+}
+
+int do_statements(SQLHSTMT stmt, const char **statements) {
+  const char **p = statements;
+  while (p && *p) {
+    CHK_TEST(do_statement(stmt, *p));
+    ++p;
+  }
+  return 0;
+}
+
+int tests_stmt(SQLHENV env, SQLHDBC conn, SQLHSTMT stmt) {
+  const char *statements[] = {
+    "drop database if exists m",
+    "create database m",
+    "use m",
+    // "create table t (ts timestamp, b bool, v1 tinyint, v2 smallint, v4 int, v8 bigint, f4 float, f8 double, blob binary(1), name nchar(1))",
+    "create table t (ts timestamp, b bool)",
+    "insert into t values('2020-10-10 00:00:00', 0)",
+    "insert into t values('2020-10-10 00:00:00.001', 1)",
+    NULL
+  };
+  CHK_TEST(do_statements(stmt, statements));
+  return 0;
+}
+
+int tests(SQLHENV env, SQLHDBC conn) {
+  SQLHSTMT stmt = {0};
+  CHK_TEST(create_statement(env, conn, &stmt));
+  int r = tests_stmt(env, conn, stmt);
+  SQLFreeHandle(SQL_HANDLE_STMT, stmt);
+  return r ? 1 : 0;
+}
+
+int test_env(void) {
+  SQLRETURN r;
+  SQLHENV env = {0};
+  r = SQLAllocEnv(&env);
+  if (r!=SQL_SUCCESS) return 1;
+  SQLFreeEnv(env);
+  return 0;
+}
+
+int test_sqls_in_stmt(SQLHENV env, SQLHDBC conn, SQLHSTMT stmt, const char *sqls) {
+  FILE *f = fopen(sqls, "rb");
+  if (!f) {
+    D("failed to open file [%s]", sqls);
+    return -1;
+  }
+
+  int r = 0;
+  while (!feof(f)) {
+    char *line = NULL;
+    size_t len = 0;
+
+    ssize_t n = getline(&line, &len, f);
+    if (n==-1) break;
+
+    const char *p = NULL;
+    do {
+      if (line[0] == '#') break;
+      if (line[n-1] == '\n') line[n-1]='\0';
+      p = line;
+      while (isspace(*p)) ++p;
+
+      if (*p==0) break;
+
+      int positive = 1;
+      if (strncmp(p, "N:", 2)==0) {
+        positive = 0;
+        p += 2;
+      } else if (strncmp(p, "P:", 2)==0) {
+        p += 2;
+      }
+
+      D("statement: [%s]", p);
+      r = do_statement(stmt, p);
+
+      if (positive && r==0) break;
+      if (!positive && r) { r = 0; break; }
+      if (positive) return r;
+      D("expecting negative result, but got positive");
+      return -1;
+    } while (0);
+
+    free(line);
+
+    if (r) break;
+  }
+
+  fclose(f);
+  return r ? 1 : 0;
+}
+
+int test_sqls_in_conn(SQLHENV env, SQLHDBC conn, const char *sqls) {
+  SQLHSTMT stmt = {0};
+  CHK_TEST(create_statement(env, conn, &stmt));
+  int r = test_sqls_in_stmt(env, conn, stmt, sqls);
+  SQLFreeHandle(SQL_HANDLE_STMT, stmt);
+  return r ? 1 : 0;
+}
+
+int test_sqls(const char *dsn, const char *uid, const char *pwd, const char *connstr, const char *sqls) {
+  int r = 0;
+  SQLHENV env  = {0};
+  SQLHDBC conn = {0};
+  if (dsn) {
+    CHK_TEST(open_connect(dsn, uid, pwd, &env, &conn));
+  } else {
+    CHK_TEST(open_driver_connect(connstr, &env, &conn));
+  }
+  r = test_sqls_in_conn(env, conn, sqls);
+  SQLDisconnect(conn);
+  SQLFreeConnect(conn);
+  SQLFreeEnv(env);
+  return r ? 1 : 0;
+}
+
+int main(int argc, char *argv[]) {
+  if (argc==1) {
+    CHK_TEST(test_env());
+    return 0;
+  }
+
+  const char *dsn = (argc>1) ? argv[1] : NULL;
+  const char *uid = (argc>2) ? argv[2] : NULL;
+  const char *pwd = (argc>3) ? argv[3] : NULL;
+  const char *connstr = (argc>4) ? argv[4] : NULL;
+  const char *sqls = (argc>5) ? argv[5] : NULL;
+
+  if (0) {
+    CHK_TEST(test_env());
+
+    CHK_TEST(test1(dsn, uid, pwd));
+
+    const char *statements[] = {
+      "drop database if exists m",
+      "create database m",
+      "use m",
+      "drop database m",
+      NULL
+    };
+    CHK_TEST(test_statements(dsn, uid, pwd, statements));
+
+    if (connstr)
+      CHK_TEST(test_driver_connect(connstr));
+
+    if (connstr) {
+      SQLHENV env  = {0};
+      SQLHDBC conn = {0};
+      CHK_TEST(open_driver_connect(connstr, &env, &conn));
+      int r = tests(env, conn);
+      SQLDisconnect(conn);
+      SQLFreeConnect(conn);
+      SQLFreeEnv(env);
+      if (r) return 1;
+    }
+  }
+
+  if ((dsn || connstr) && 1) {
+    CHK_TEST(test_sqls(dsn, uid, pwd, connstr, sqls));
+  }
+
+  return 0;
+}
+