diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index 2dbf90bf11d671afc7bd50629fbe5125edd66f2a..7318f292e6fb89602a94738f0d0c815b2a44eef0 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -3205,13 +3205,6 @@ static int readTagFromCsvFileToMem(SSuperTable  * superTblInfo) {
   return 0;
 }
 
-#if 0
-int readSampleFromJsonFileToMem(SSuperTable  * superTblInfo) {
-  // TODO
-  return 0;
-}
-#endif
-
 /*
   Read 10000 lines at most. If more than 10000 lines, continue to read after using
 */
@@ -5327,7 +5320,7 @@ static int64_t generateInterlaceDataWithoutStb(
 
 #if STMT_IFACE_ENABLED == 1
 static int32_t prepareStmtBindArrayByType(TAOS_BIND *bind,
-        char *dataType, int32_t dataLen, char **ptr)
+        char *dataType, int32_t dataLen, char **ptr, char *value)
 {
     if (0 == strncasecmp(dataType,
                 "BINARY", strlen("BINARY"))) {
@@ -5337,12 +5330,18 @@ static int32_t prepareStmtBindArrayByType(TAOS_BIND *bind,
             return -1;
         }
         char *bind_binary = (char *)*ptr;
-        rand_string(bind_binary, dataLen);
 
         bind->buffer_type = TSDB_DATA_TYPE_BINARY;
-        bind->buffer_length = dataLen;
-        bind->buffer = bind_binary;
+        if (value) {
+            strncpy(bind_binary, value, strlen(value));
+            bind->buffer_length = strlen(bind_binary);
+        } else {
+            rand_string(bind_binary, dataLen);
+            bind->buffer_length = dataLen;
+        }
+
         bind->length = &bind->buffer_length;
+        bind->buffer = bind_binary;
         bind->is_null = NULL;
 
         *ptr += bind->buffer_length;
@@ -5354,9 +5353,14 @@ static int32_t prepareStmtBindArrayByType(TAOS_BIND *bind,
             return -1;
         }
         char *bind_nchar = (char *)*ptr;
-        rand_string(bind_nchar, dataLen);
 
         bind->buffer_type = TSDB_DATA_TYPE_NCHAR;
+        if (value) {
+            strncpy(bind_nchar, value, strlen(value));
+        } else {
+            rand_string(bind_nchar, dataLen);
+        }
+
         bind->buffer_length = strlen(bind_nchar);
         bind->buffer = bind_nchar;
         bind->length = &bind->buffer_length;
@@ -5367,7 +5371,11 @@ static int32_t prepareStmtBindArrayByType(TAOS_BIND *bind,
                 "INT", strlen("INT"))) {
         int32_t *bind_int = (int32_t *)*ptr;
 
-        *bind_int = rand_int();
+        if (value) {
+            *bind_int = atoi(value);
+        } else {
+            *bind_int = rand_int();
+        }
         bind->buffer_type = TSDB_DATA_TYPE_INT;
         bind->buffer_length = sizeof(int32_t);
         bind->buffer = bind_int;
@@ -5379,7 +5387,11 @@ static int32_t prepareStmtBindArrayByType(TAOS_BIND *bind,
                 "BIGINT", strlen("BIGINT"))) {
         int64_t *bind_bigint = (int64_t *)*ptr;
 
-        *bind_bigint = rand_bigint();
+        if (value) {
+            *bind_bigint = atoll(value);
+        } else {
+            *bind_bigint = rand_bigint();
+        }
         bind->buffer_type = TSDB_DATA_TYPE_BIGINT;
         bind->buffer_length = sizeof(int64_t);
         bind->buffer = bind_bigint;
@@ -5391,7 +5403,11 @@ static int32_t prepareStmtBindArrayByType(TAOS_BIND *bind,
                 "FLOAT", strlen("FLOAT"))) {
         float   *bind_float = (float *) *ptr;
 
-        *bind_float = rand_float();
+        if (value) {
+            *bind_float = (float)atof(value);
+        } else {
+            *bind_float = rand_float();
+        }
         bind->buffer_type = TSDB_DATA_TYPE_FLOAT;
         bind->buffer_length = sizeof(float);
         bind->buffer = bind_float;
@@ -5403,7 +5419,11 @@ static int32_t prepareStmtBindArrayByType(TAOS_BIND *bind,
                 "DOUBLE", strlen("DOUBLE"))) {
         double  *bind_double = (double *)*ptr;
 
-        *bind_double = rand_double();
+        if (value) {
+            *bind_double = atof(value);
+        } else {
+            *bind_double = rand_double();
+        }
         bind->buffer_type = TSDB_DATA_TYPE_DOUBLE;
         bind->buffer_length = sizeof(double);
         bind->buffer = bind_double;
@@ -5415,7 +5435,11 @@ static int32_t prepareStmtBindArrayByType(TAOS_BIND *bind,
                 "SMALLINT", strlen("SMALLINT"))) {
         int16_t *bind_smallint = (int16_t *)*ptr;
 
-        *bind_smallint = rand_smallint();
+        if (value) {
+            *bind_smallint = (int16_t)atoi(value);
+        } else {
+            *bind_smallint = rand_smallint();
+        }
         bind->buffer_type = TSDB_DATA_TYPE_SMALLINT;
         bind->buffer_length = sizeof(int16_t);
         bind->buffer = bind_smallint;
@@ -5427,7 +5451,11 @@ static int32_t prepareStmtBindArrayByType(TAOS_BIND *bind,
                 "TINYINT", strlen("TINYINT"))) {
         int8_t  *bind_tinyint = (int8_t *)*ptr;
 
-        *bind_tinyint = rand_tinyint();
+        if (value) {
+            *bind_tinyint = (int8_t)atoi(value);
+        } else {
+            *bind_tinyint = rand_tinyint();
+        }
         bind->buffer_type = TSDB_DATA_TYPE_TINYINT;
         bind->buffer_length = sizeof(int8_t);
         bind->buffer = bind_tinyint;
@@ -5450,7 +5478,11 @@ static int32_t prepareStmtBindArrayByType(TAOS_BIND *bind,
                 "TIMESTAMP", strlen("TIMESTAMP"))) {
         int64_t *bind_ts2 = (int64_t *) *ptr;
 
-        *bind_ts2 = rand_bigint();
+        if (value) {
+            *bind_ts2 = atoll(value);
+        } else {
+            *bind_ts2 = rand_bigint();
+        }
         bind->buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
         bind->buffer_length = sizeof(int64_t);
         bind->buffer = bind_ts2;
@@ -5516,12 +5548,13 @@ static int32_t prepareStmtWithoutStb(
         ptr += bind->buffer_length;
 
         for (int i = 0; i < g_args.num_of_CPR; i ++) {
-            bind = (TAOS_BIND *)((char *)bindArray + (sizeof(TAOS_BIND) * (i + 1)));
+            bind = (TAOS_BIND *)((char *)bindArray
+                    + (sizeof(TAOS_BIND) * (i + 1)));
             if ( -1 == prepareStmtBindArrayByType(
                         bind,
                         data_type[i],
                         g_args.len_of_binary,
-                        &ptr)) {
+                        &ptr, NULL)) {
                 return -1;
             }
         }
@@ -5540,12 +5573,14 @@ static int32_t prepareStmtWithoutStb(
     return k;
 }
 
-static int32_t prepareStbStmt(SSuperTable *stbInfo,
+static int32_t prepareStbStmt(
+        SSuperTable *stbInfo,
         TAOS_STMT *stmt,
         char *tableName, uint32_t batch,
         uint64_t insertRows,
         uint64_t recordFrom,
-        int64_t startTime, char *buffer)
+        int64_t startTime,
+        int64_t *pSamplePos)
 {
     int ret = taos_stmt_set_tbname(stmt, tableName);
     if (ret != 0) {
@@ -5556,16 +5591,24 @@ static int32_t prepareStbStmt(SSuperTable *stbInfo,
 
     char *bindArray = malloc(sizeof(TAOS_BIND) * (stbInfo->columnCount + 1));
     if (bindArray == NULL) {
-        errorPrint("Failed to allocate %d bind params\n",
-                (stbInfo->columnCount + 1));
+        errorPrint("%s() LN%d, Failed to allocate %d bind params\n",
+                __func__, __LINE__, (stbInfo->columnCount + 1));
         return -1;
     }
 
-    bool tsRand;
+    bool sourceRand;
     if (0 == strncasecmp(stbInfo->dataSource, "rand", strlen("rand"))) {
-        tsRand = true;
+        sourceRand = true;
     } else {
-        tsRand = false;
+        sourceRand = false;     // from sample data file
+    }
+
+    char *bindBuffer = malloc(g_args.len_of_binary);
+    if (bindBuffer == NULL) {
+        errorPrint("%s() LN%d, Failed to allocate %d bind buffer\n",
+                __func__, __LINE__, g_args.len_of_binary);
+        free(bindArray);
+        return -1;
     }
 
     uint32_t k;
@@ -5581,7 +5624,7 @@ static int32_t prepareStbStmt(SSuperTable *stbInfo,
 
         bind_ts = (int64_t *)ptr;
         bind->buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
-        if (tsRand) {
+        if (sourceRand) {
             *bind_ts = startTime + getTSRandTail(
                     stbInfo->timeStampStep, k,
                     stbInfo->disorderRatio,
@@ -5596,14 +5639,46 @@ static int32_t prepareStbStmt(SSuperTable *stbInfo,
 
         ptr += bind->buffer_length;
 
+        int cursor = 0;
         for (int i = 0; i < stbInfo->columnCount; i ++) {
             bind = (TAOS_BIND *)((char *)bindArray + (sizeof(TAOS_BIND) * (i + 1)));
-            if ( -1 == prepareStmtBindArrayByType(
-                        bind,
-                        stbInfo->columns[i].dataType,
-                        stbInfo->columns[i].dataLen,
-                        &ptr)) {
-                return -1;
+
+            if (sourceRand) {
+                if ( -1 == prepareStmtBindArrayByType(
+                            bind,
+                            stbInfo->columns[i].dataType,
+                            stbInfo->columns[i].dataLen,
+                            &ptr,
+                            NULL)) {
+                    free(bindArray);
+                    free(bindBuffer);
+                    return -1;
+                }
+            } else {
+                char *restStr = stbInfo->sampleDataBuf + cursor;
+                int lengthOfRest = strlen(restStr);
+
+                int index = 0;
+                for (index = 0; index < lengthOfRest; index ++) {
+                    if (restStr[index] == ',') {
+                        break;
+                    }
+                }
+
+                memset(bindBuffer, 0, g_args.len_of_binary);
+                strncpy(bindBuffer, restStr, index);
+                cursor += index + 1; // skip ',' too
+
+                if ( -1 == prepareStmtBindArrayByType(
+                            bind,
+                            stbInfo->columns[i].dataType,
+                            stbInfo->columns[i].dataLen,
+                            &ptr,
+                            bindBuffer)) {
+                    free(bindArray);
+                    free(bindBuffer);
+                    return -1;
+                }
             }
         }
         taos_stmt_bind_param(stmt, (TAOS_BIND *)bindArray);
@@ -5612,11 +5687,16 @@ static int32_t prepareStbStmt(SSuperTable *stbInfo,
 
         k++;
         recordFrom ++;
+
+        if (!sourceRand) {
+            (*pSamplePos) ++;
+        }
         if (recordFrom >= insertRows) {
             break;
         }
     }
 
+    free(bindBuffer);
     free(bindArray);
     return k;
 }
@@ -5809,13 +5889,14 @@ static void* syncWriteInterlace(threadInfo *pThreadInfo) {
       if (superTblInfo) {
           if (superTblInfo->iface == STMT_IFACE) {
 #if STMT_IFACE_ENABLED == 1
-              generated = prepareStbStmt(superTblInfo,
+              generated = prepareStbStmt(
+                      superTblInfo,
                       pThreadInfo->stmt,
                       tableName,
                       batchPerTbl,
                       insertRows, i,
                       startTime,
-                      pThreadInfo->buffer);
+                      &(pThreadInfo->samplePos));
 #else
               generated = -1;
 #endif
@@ -6040,7 +6121,8 @@ static void* syncWriteProgressive(threadInfo *pThreadInfo) {
                       pThreadInfo->stmt,
                       tableName,
                       g_args.num_of_RPR,
-                      insertRows, i, start_time, pstr);
+                      insertRows, i, start_time,
+                      &(pThreadInfo->samplePos));
 #else
               generated = -1;
 #endif