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The following commit(s) were added to refs/heads/master by this push:
     new 3de3322f277 [fix](function) use need_replace_null_data_to_default for 
function round (#56129)
3de3322f277 is described below

commit 3de3322f2776eecdc0d32d713f37e75b723e12b9
Author: Mryange <[email protected]>
AuthorDate: Wed Sep 17 17:00:38 2025 +0800

    [fix](function) use need_replace_null_data_to_default for function round 
(#56129)
    
    ### What problem does this PR solve?
    The round function should use need_replace_null_data_to_default because
    internal checks are performed for invalid values.
    Not using need_replace_null_data_to_default may cause the function to
    encounter random values when handling null values, resulting in errors.
    
    ### Release note
    
    None
    
    ### Check List (For Author)
    
    - Test <!-- At least one of them must be included. -->
        - [x] Regression test
        - [ ] Unit Test
        - [ ] Manual test (add detailed scripts or steps below)
        - [ ] No need to test or manual test. Explain why:
    - [ ] This is a refactor/code format and no logic has been changed.
            - [ ] Previous test can cover this change.
            - [ ] No code files have been changed.
            - [ ] Other reason <!-- Add your reason?  -->
    
    - Behavior changed:
        - [x] No.
        - [ ] Yes. <!-- Explain the behavior change -->
    
    - Does this need documentation?
        - [x] No.
    - [ ] Yes. <!-- Add document PR link here. eg:
    https://github.com/apache/doris-website/pull/1214 -->
    
    ### Check List (For Reviewer who merge this PR)
    
    - [ ] Confirm the release note
    - [ ] Confirm test cases
    - [ ] Confirm document
    - [ ] Add branch pick label <!-- Add branch pick label that this PR
    should merge into -->
---
 be/src/vec/functions/round.h                          |   2 ++
 .../sql_functions/math_functions/test_round.out       | Bin 5553 -> 5583 bytes
 .../sql_functions/math_functions/test_round.groovy    |  17 +++++++++++++++++
 3 files changed, 19 insertions(+)

diff --git a/be/src/vec/functions/round.h b/be/src/vec/functions/round.h
index f447c17e789..7f8bbfe6e83 100644
--- a/be/src/vec/functions/round.h
+++ b/be/src/vec/functions/round.h
@@ -675,6 +675,8 @@ public:
         return Impl::get_variadic_argument_types();
     }
 
+    bool need_replace_null_data_to_default() const override { return true; }
+
     /// Get result types by argument types. If the function does not apply to 
these arguments, throw an exception.
     DataTypePtr get_return_type_impl(const DataTypes& arguments) const 
override {
         if ((arguments.empty()) || (arguments.size() > 2)) {
diff --git 
a/regression-test/data/query_p0/sql_functions/math_functions/test_round.out 
b/regression-test/data/query_p0/sql_functions/math_functions/test_round.out
index ccdd9551f80..13ae8bcac9c 100644
Binary files 
a/regression-test/data/query_p0/sql_functions/math_functions/test_round.out and 
b/regression-test/data/query_p0/sql_functions/math_functions/test_round.out 
differ
diff --git 
a/regression-test/suites/query_p0/sql_functions/math_functions/test_round.groovy
 
b/regression-test/suites/query_p0/sql_functions/math_functions/test_round.groovy
index df54600e8e8..c47d1c799fc 100644
--- 
a/regression-test/suites/query_p0/sql_functions/math_functions/test_round.groovy
+++ 
b/regression-test/suites/query_p0/sql_functions/math_functions/test_round.groovy
@@ -313,4 +313,21 @@ suite("test_round") {
         sql ("select round_bankers(a, 1-2) from test_round_bankers_scale order 
by id")
         result([[new BigDecimal(40)]])
     }
+
+
+    sql """
+        DROP TABLE IF EXISTS test_dfloor_null;
+    """
+
+    sql """
+    CREATE TABLE test_dfloor_null (id INT, col1 DOUBLE, col2 DOUBLE, col3 
DECIMAL(10,2), col4 VARCHAR(20), col5 DATETIME) DISTRIBUTED BY HASH(id) BUCKETS 
4 PROPERTIES ("replication_num" = "1");
+    """
+
+    sql """
+    INSERT INTO test_dfloor_null (id, col1, col2, col3, col4, col5) VALUES (1, 
10.5, 20.3, 100.25, 'test', '2023-01-01 10:00:00'), (2, 1.7976931348623157E308, 
-1.7976931348623157E308, 99999999.99, 'boundary', '9999-12-31 23:59:59'), (3, 
NULL, 0.0, -99999999.99, 'invalid', '1000-01-01 00:00:00'), (4, 15.75, 25.5, 
50.00, 'special$char', '2023-06-15 14:30:45'), (5, 0.0, -0.0, 0.00, 'zero', 
'2023-03-20 08:15:30');
+    """
+
+    qt_sql """
+        SELECT dfloor(col1, col2) AS r FROM test_dfloor_null order by id;
+    """
 }


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