fix:memory problems where using tag

source/libs/parser/src/parInsert.c

@@ -1018,7 +1018,7 @@ static int32_t parseTagsClause(SInsertParseContext* pCxt, SSchema* pSchema, uint
 end:
   for (int i = 0; i < taosArrayGetSize(pTagVals); ++i) {
     STagVal* p = (STagVal*)taosArrayGet(pTagVals, i);
-    if (IS_VAR_DATA_TYPE(p->type)) {
+    if (p->type == TSDB_DATA_TYPE_NCHAR) {
       taosMemoryFree(p->pData);
     }
   }