diff --git a/tests/examples/c/CMakeLists.txt b/tests/examples/c/CMakeLists.txt
index 906ca2dd41c3fb222c816f49dd23af41cc81cffe..e94de3cbca574de71c8bcefc4b52173922c05a98 100644
--- a/tests/examples/c/CMakeLists.txt
+++ b/tests/examples/c/CMakeLists.txt
@@ -5,6 +5,8 @@ IF (TD_LINUX)
   AUX_SOURCE_DIRECTORY(. SRC)
   ADD_EXECUTABLE(demo apitest.c)
   TARGET_LINK_LIBRARIES(demo taos_static trpc tutil pthread )
+  ADD_EXECUTABLE(sml schemaless.c)
+  TARGET_LINK_LIBRARIES(sml taos_static trpc tutil pthread )
   ADD_EXECUTABLE(subscribe subscribe.c)
   TARGET_LINK_LIBRARIES(subscribe taos_static trpc tutil pthread )
   ADD_EXECUTABLE(epoll epoll.c)
diff --git a/tests/examples/c/schemaless.c b/tests/examples/c/schemaless.c
new file mode 100644
index 0000000000000000000000000000000000000000..e7573a2186c5c602da3d3e1afb9851e179fd0c3e
--- /dev/null
+++ b/tests/examples/c/schemaless.c
@@ -0,0 +1,85 @@
+#include "taos.h"
+#include "taoserror.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <time.h>
+#include <unistd.h>
+
+int numSuperTables = 8;
+int numChildTables = 1024;
+int numRowsPerChildTable = 128;
+
+void shuffle(char**lines, size_t n)
+{
+  if (n > 1)
+  {
+    size_t i;
+    for (i = 0; i < n - 1; i++)
+    {
+      size_t j = i + rand() / (RAND_MAX / (n - i) + 1);
+      char* t = lines[j];
+      lines[j] = lines[i];
+      lines[i] = t;
+    }
+  }
+}
+
+static int64_t getTimeInUs() {
+  struct timeval systemTime;
+  gettimeofday(&systemTime, NULL);
+  return (int64_t)systemTime.tv_sec * 1000000L + (int64_t)systemTime.tv_usec;
+}
+
+int main(int argc, char* argv[]) {
+  TAOS_RES *result;
+  const char* host = "127.0.0.1";
+  const char* user = "root";
+  const char* passwd = "taosdata";
+
+  taos_options(TSDB_OPTION_TIMEZONE, "GMT-8");
+  TAOS* taos = taos_connect(host, user, passwd, "", 0);
+  if (taos == NULL) {
+    printf("\033[31mfailed to connect to db, reason:%s\033[0m\n", taos_errstr(taos));
+    exit(1);
+  }
+
+  char* info = taos_get_server_info(taos);
+  printf("server info: %s\n", info);
+  info = taos_get_client_info(taos);
+  printf("client info: %s\n", info);
+  result = taos_query(taos, "drop database if exists db;");
+  taos_free_result(result);
+  usleep(100000);
+  result = taos_query(taos, "create database db precision 'ms';");
+  taos_free_result(result);
+  usleep(100000);
+
+  (void)taos_select_db(taos, "db");
+
+  time_t ct = time(0);
+  int64_t ts = ct * 1000;
+  char* lineFormat = "sta%d,t0=true,t1=127i8,t2=32767i16,t3=%di32,t4=9223372036854775807i64,t9=11.12345f32,t10=22.123456789f64,t11=\"binaryTagValue\",t12=L\"ncharTagValue\" c0=true,c1=127i8,c2=32767i16,c3=2147483647i32,c4=9223372036854775807i64,c5=255u8,c6=32770u16,c7=2147483699u32,c8=9223372036854775899u64,c9=11.12345f32,c10=22.123456789f64,c11=\"binaryValue\",c12=L\"ncharValue\" %lldms";
+
+  char** lines = calloc(numSuperTables * numChildTables * numRowsPerChildTable, sizeof(char*));
+  int l = 0;
+  for (int i = 0; i < numSuperTables; ++i) {
+    for (int j = 0; j < numChildTables; ++j) {
+      for (int k = 0; k < numRowsPerChildTable; ++k) {
+        char* line = calloc(512, 1);
+        snprintf(line, 512, lineFormat, i, j, ts + 10 * l);
+        lines[l] = line;
+        ++l;
+      }
+    }
+  }
+  shuffle(lines, numSuperTables * numChildTables * numRowsPerChildTable);
+
+  printf("%s\n", "begin taos_insert_lines");
+  int64_t  begin = getTimeInUs();
+  int32_t code = taos_insert_lines(taos, lines, numSuperTables * numChildTables * numRowsPerChildTable);
+  int64_t end = getTimeInUs();
+  printf("code: %d, %s, %ld\n", code, tstrerror(code), end-begin);
+  return 0;
+}