fix segmentation fault

Author: Pengrongkun

source/libs/parser/src/parser.c

@@ -158,6 +158,10 @@ static int32_t setValueByBindParam(SValueNode* pVal, TAOS_MULTI_BIND* pParam) {
     taosMemoryFreeClear(pVal->datum.p);
   }
 
+  if (!pParam || pParam->buffer_type == TSDB_DATA_TYPE_NULL) {
+    return TSDB_CODE_APP_ERROR;
+  }
+
   if (pParam->is_null && 1 == *(pParam->is_null)) {
     pVal->node.resType.type = TSDB_DATA_TYPE_NULL;
     pVal->node.resType.bytes = tDataTypes[TSDB_DATA_TYPE_NULL].bytes;
@@ -445,6 +449,10 @@ static int32_t setValueByBindParam2(SValueNode* pVal, TAOS_STMT2_BIND* pParam) {
     taosMemoryFreeClear(pVal->datum.p);
   }
 
+  if (!pParam || pParam->buffer_type == TSDB_DATA_TYPE_NULL) {
+    return TSDB_CODE_APP_ERROR;
+  }
+
   if (pParam->is_null && 1 == *(pParam->is_null)) {
     pVal->node.resType.type = TSDB_DATA_TYPE_NULL;
     pVal->node.resType.bytes = tDataTypes[TSDB_DATA_TYPE_NULL].bytes;