gavinchou commented on code in PR #13332:
URL: https://github.com/apache/doris/pull/13332#discussion_r1002513501


##########
be/src/vec/columns/column_decimal.cpp:
##########
@@ -164,9 +164,18 @@ template <typename T>
 void ColumnDecimal<T>::update_hashes_with_value(uint64_t* __restrict hashes,
                                                 const uint8_t* __restrict 
null_data) const {
     auto s = size();
-    for (int i = 0; i < s; i++) {
-        hashes[i] = HashUtil::xxHash64WithSeed(reinterpret_cast<const 
char*>(&data[i]), sizeof(T),
-                                               hashes[i]);
+    if (null_data) {

Review Comment:
   Would it be better to express the logic as the following to save LOC?
   ```
        for (int i = 0; i < s; i++) {
           if (null_data != nullptr && null_data[i] != 0) continue;
           hashes[i] = HashUtil::xxHash64WithSeed(reinterpret_cast<const 
char*>(&data[i]), sizeof(T),
                                                  hashes[i]);
        }
   ```



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