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Posted to commits@doris.apache.org by GitBox <gi...@apache.org> on 2022/10/12 12:06:33 UTC

[GitHub] [doris] starocean999 opened a new pull request, #13332: [fix](hash)update_hashes_with_value method should handle if input value is null

starocean999 opened a new pull request, #13332:
URL: https://github.com/apache/doris/pull/13332

   
   # Proposed changes
   
   Issue Number: close #xxx
   
   ## Problem summary
   
   Describe your changes.
   
   ## Checklist(Required)
   
   1. Does it affect the original behavior: 
       - [ ] Yes
       - [ ] No
       - [ ] I don't know
   2. Has unit tests been added:
       - [ ] Yes
       - [ ] No
       - [ ] No Need
   3. Has document been added or modified:
       - [ ] Yes
       - [ ] No
       - [ ] No Need
   4. Does it need to update dependencies:
       - [ ] Yes
       - [ ] No
   5. Are there any changes that cannot be rolled back:
       - [ ] Yes (If Yes, please explain WHY)
       - [ ] No
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at [dev@doris.apache.org](mailto:dev@doris.apache.org) by explaining why you chose the solution you did and what alternatives you considered, etc...
   
   


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[GitHub] [doris] github-actions[bot] commented on pull request #13332: [fix](hash)update_hashes_with_value method should handle if input value is null

Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on PR #13332:
URL: https://github.com/apache/doris/pull/13332#issuecomment-1277006308

   PR approved by anyone and no changes requested.


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[GitHub] [doris] github-actions[bot] commented on pull request #13332: [fix](hash)update_hashes_with_value method should handle if input value is null

Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on PR #13332:
URL: https://github.com/apache/doris/pull/13332#issuecomment-1277006275

   PR approved by at least one committer and no changes requested.


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[GitHub] [doris] yiguolei merged pull request #13332: [fix](hash)update_hashes_with_value method should handle if input value is null

Posted by GitBox <gi...@apache.org>.
yiguolei merged PR #13332:
URL: https://github.com/apache/doris/pull/13332


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[GitHub] [doris] gavinchou commented on a diff in pull request #13332: [fix](hash)update_hashes_with_value method should handle if input value is null

Posted by GitBox <gi...@apache.org>.
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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[GitHub] [doris] HappenLee commented on a diff in pull request #13332: [fix](hash)update_hashes_with_value method should handle if input value is null

Posted by GitBox <gi...@apache.org>.
HappenLee commented on code in PR #13332:
URL: https://github.com/apache/doris/pull/13332#discussion_r993556849


##########
be/src/vec/columns/column_decimal.cpp:
##########
@@ -164,9 +164,21 @@ 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) {
+        for (int i = 0; i < s; i++) {
+            if (null_data[i] == 0) {
+                hashes[i] = HashUtil::xxHash64WithSeed(reinterpret_cast<const char*>(&data[i]),
+                                                       sizeof(T), hashes[i]);
+            }
+            else {

Review Comment:
   here seems do not need compute again ? just do nothing is ok ?



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