diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 7093e14982..83d9b35a91 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -1750,7 +1750,11 @@ int32_t setResultDataPtr(SReqResultInfo* pResultInfo, TAOS_FIELD* pFields, int32
   char* pStart = p;
   for (int32_t i = 0; i < numOfCols; ++i) {
     colLength[i] = htonl(colLength[i]);
-    ASSERT(colLength[i] < dataLen);
+    if (colLength[i] >= dataLen) {
+      tscError("invalid colLength %d, dataLen %d", colLength[i], dataLen);
+      *(char*)0 = 1;
+      ASSERT(0);
+    }
 
     if (IS_VAR_DATA_TYPE(pResultInfo->fields[i].type)) {
       pResultInfo->pCol[i].offset = (int32_t*)pStart;