diff --git a/include/common/tdataformat.h b/include/common/tdataformat.h
index 057cff7624f52f658cabf6356d89451cdc8b8976..9e3b9d191caa78751c56e7166d9d161c8ce4a272 100644
--- a/include/common/tdataformat.h
+++ b/include/common/tdataformat.h
@@ -118,6 +118,10 @@ uint8_t tColDataGetBitValue(const SColData *pColData, int32_t iVal);
 int32_t tColDataCopy(SColData *pColDataSrc, SColData *pColDataDest);
 extern void (*tColDataCalcSMA[])(SColData *pColData, int64_t *sum, int64_t *max, int64_t *min, int16_t *numOfNull);
 
+// for stmt bind
+int32_t tColDataAddValueByBind(SColData *pColData, TAOS_MULTI_BIND *pBind);
+int32_t tColDataSortMerge(SColData *aColData);
+
 // STRUCT ================================
 struct STColumn {
   col_id_t colId;
diff --git a/source/common/src/tdataformat.c b/source/common/src/tdataformat.c
index f1ccef586e62a3f9d47272799806bc87d0771e5e..55d843f616c9904298f814dcc982e03ef56cb0e0 100644
--- a/source/common/src/tdataformat.c
+++ b/source/common/src/tdataformat.c
@@ -1660,6 +1660,74 @@ _exit:
   return code;
 }
 
+int32_t tColDataAddValueByBind(SColData *pColData, TAOS_MULTI_BIND *pBind) {
+  int32_t code = 0;
+
+  bool allValue;
+  bool allNull;
+  if (pBind->is_null) {
+    bool same = (memcmp(pBind->is_null, pBind->is_null + 1, pBind->num - 1) == 0);
+    allNull = (same && pBind->is_null[0] != 0);
+    allValue = (same && pBind->is_null[0] == 0);
+  } else {
+    allNull = false;
+    allValue = true;
+  }
+
+  pColData->nVal += pBind->num;
+  if (IS_VAR_DATA_TYPE(pBind->buffer_type)) {
+    // var
+    for (int32_t i = 0; i < pBind->num; ++i) {
+      if (pBind->is_null[i]) {
+        // tColDataAppendNull(pColData);
+      } else {
+        uint8_t *pData = (uint8_t *)pBind->buffer + pBind->buffer_length * i;
+
+        SValue value = {.nData = pBind->length[i], .pData = pData};
+      }
+    }
+  } else {
+    // fix
+    pColData->nVal += pBind->num;
+
+    if (allValue) {
+      pColData->flag |= HAS_VALUE;
+      if (pColData->flag != HAS_VALUE) {
+        // todo
+      }
+
+      int32_t nData = pColData->nData + TYPE_BYTES[pBind->buffer_type] * pBind->num;
+      code = tRealloc(&pColData->pData, nData);
+      if (code) goto _exit;
+
+      memcpy(pColData->pData + pColData->nData, pBind->buffer, nData - pColData->nData);
+      pColData->nData = nData;
+    } else if (allNull) {
+      pColData->flag |= HAS_NULL;
+
+      // todo
+
+    } else {
+      for (int32_t i = 0; i < pBind->num; ++i) {
+        if (pBind->is_null[i]) {
+          code = tColDataAppendValue(pColData, &COL_VAL_NULL(pColData->cid, pColData->type));
+          // tColDataAppendNull(pColData);
+        } else {
+          uint8_t *pData = (uint8_t *)pBind->buffer + TYPE_BYTES[pBind->buffer_type] * i;
+        }
+      }
+    }
+  }
+
+_exit:
+  return code;
+}
+
+int32_t tColDataSortMerge(SColData *aColData) {
+  // todo
+  return 0;
+}
+
 #define CALC_SUM_MAX_MIN(SUM, MAX, MIN, VAL) \
   do {                                       \
     (SUM) += (VAL);                          \