diff --git a/source/libs/parser/src/parTranslater.c b/source/libs/parser/src/parTranslater.c
index bbefaa468d..c7f0c13de0 100644
--- a/source/libs/parser/src/parTranslater.c
+++ b/source/libs/parser/src/parTranslater.c
@@ -578,15 +578,15 @@ static EDealRes translateValueImpl(STranslateContext* pCxt, SValueNode* pVal, SD
         break;
       }
       case TSDB_DATA_TYPE_NCHAR: {
-        targetDt.bytes *= TSDB_NCHAR_SIZE;
-        pVal->datum.p = taosMemoryCalloc(1, targetDt.bytes + VARSTR_HEADER_SIZE + 1);
+        int32_t bytes = targetDt.bytes * TSDB_NCHAR_SIZE;
+        pVal->datum.p = taosMemoryCalloc(1, bytes + VARSTR_HEADER_SIZE + 1);
         if (NULL == pVal->datum.p) {
           return generateDealNodeErrMsg(pCxt, TSDB_CODE_OUT_OF_MEMORY);
           ;
         }
 
         int32_t output = 0;
-        if (!taosMbsToUcs4(pVal->literal, pVal->node.resType.bytes, (TdUcs4*)varDataVal(pVal->datum.p), targetDt.bytes,
+        if (!taosMbsToUcs4(pVal->literal, pVal->node.resType.bytes, (TdUcs4*)varDataVal(pVal->datum.p), bytes,
                            &output)) {
           return generateDealNodeErrMsg(pCxt, TSDB_CODE_PAR_WRONG_VALUE_TYPE, pVal->literal);
         }
@@ -601,6 +601,7 @@ static EDealRes translateValueImpl(STranslateContext* pCxt, SValueNode* pVal, SD
         break;
     }
   }
+  pVal->node.resType = targetDt;
   pVal->translate = true;
   return DEAL_RES_CONTINUE;
 }