diff --git a/be/src/vec/aggregate_functions/aggregate_function_approx_count_distinct.cpp b/be/src/vec/aggregate_functions/aggregate_function_approx_count_distinct.cpp
index b3d46a891520db..81fb8462db14b3 100644
--- a/be/src/vec/aggregate_functions/aggregate_function_approx_count_distinct.cpp
+++ b/be/src/vec/aggregate_functions/aggregate_function_approx_count_distinct.cpp
@@ -29,8 +29,9 @@ AggregateFunctionPtr create_aggregate_function_approx_count_distinct(
         const bool result_is_nullable, const AggregateFunctionAttr& attr) {
     return creator_with_type_list<
             TYPE_BOOLEAN, TYPE_TINYINT, TYPE_SMALLINT, TYPE_INT, TYPE_BIGINT, TYPE_LARGEINT,
-            TYPE_FLOAT, TYPE_DOUBLE, TYPE_DECIMAL32, TYPE_DECIMAL64, TYPE_DECIMAL128I,
-            TYPE_DECIMAL256, TYPE_VARCHAR, TYPE_DATEV2, TYPE_DATETIMEV2, TYPE_IPV4, TYPE_IPV6,
+            TYPE_FLOAT, TYPE_DOUBLE, TYPE_DECIMALV2, TYPE_DECIMAL32, TYPE_DECIMAL64,
+            TYPE_DECIMAL128I, TYPE_DECIMAL256, TYPE_VARCHAR, TYPE_DATEV2, TYPE_DATETIMEV2,
+            TYPE_IPV4, TYPE_IPV6,
             TYPE_TIMESTAMPTZ>::create<AggregateFunctionApproxCountDistinct>(argument_types,
                                                                             result_is_nullable,
                                                                             attr);
diff --git a/regression-test/data/nereids_p0/datatype/test_decimalv2.out b/regression-test/data/nereids_p0/datatype/test_decimalv2.out
index 70c7ed37cbbf78..7df088d5649870 100644
--- a/regression-test/data/nereids_p0/datatype/test_decimalv2.out
+++ b/regression-test/data/nereids_p0/datatype/test_decimalv2.out
@@ -1,52 +1,55 @@
 -- This file is automatically generated. You should know what you did if you want to edit this
 -- !sql1 --
-1.230
+1.230000000
 
 -- !sql2 --
 1.230
 
 -- !sql1 --
-1	1.230
-2	2.340
-3	3.450
+1	1.230000000
+2	2.340000000
+3	3.450000000
 
 -- !sql2 --
-1	1.230	1	1.230
-2	2.340	2	2.340
-3	3.450	3	3.450
+1	1.230000000	1	1.230000000
+2	2.340000000	2	2.340000000
+3	3.450000000	3	3.450000000
 
 -- !sql2 --
-1	1.230	1	1.230
-2	2.340	2	2.340
-3	3.450	3	3.450
+1	1.230000000	1	1.230000000
+2	2.340000000	2	2.340000000
+3	3.450000000	3	3.450000000
 
 -- !sql2 --
-1	1.230	1	1.230
-2	2.340	2	2.340
-3	3.450	3	3.450
+1	1.230000000	1	1.230000000
+2	2.340000000	2	2.340000000
+3	3.450000000	3	3.450000000
 
 -- !sql2 --
-1	1.230	1	1.230
-2	2.340	2	2.340
-3	3.450	3	3.450
+1	1.230000000	1	1.230000000
+2	2.340000000	2	2.340000000
+3	3.450000000	3	3.450000000
 
 -- !sql2 --
-1	1.230	1	1.230
-2	2.340	2	2.340
-3	3.450	3	3.450
+1	1.230000000	1	1.230000000
+2	2.340000000	2	2.340000000
+3	3.450000000	3	3.450000000
 
 -- !sql2 --
-1	1.230	1	1.230
-2	2.340	2	2.340
-3	3.450	3	3.450
+1	1.230000000	1	1.230000000
+2	2.340000000	2	2.340000000
+3	3.450000000	3	3.450000000
 
 -- !sql2 --
-1	1.230	1	1.230
-2	2.340	2	2.340
-3	3.450	3	3.450
+1	1.230000000	1	1.230000000
+2	2.340000000	2	2.340000000
+3	3.450000000	3	3.450000000
 
 -- !sql2 --
-1	1.230	1	1.230
-2	2.340	2	2.340
-3	3.450	3	3.450
+1	1.230000000	1	1.230000000
+2	2.340000000	2	2.340000000
+3	3.450000000	3	3.450000000
+
+-- !test --
+3
 
diff --git a/regression-test/suites/nereids_p0/datatype/test_decimalv2.groovy b/regression-test/suites/nereids_p0/datatype/test_decimalv2.groovy
index 3bdab1ccd51045..6b689d7f152a38 100644
--- a/regression-test/suites/nereids_p0/datatype/test_decimalv2.groovy
+++ b/regression-test/suites/nereids_p0/datatype/test_decimalv2.groovy
@@ -84,5 +84,7 @@ suite("test_decimalv2") {
     sql " set runtime_filter_type = 8; "
     qt_sql2 "select * from ${tbName} a, ${tbName} b WHERE a.c2 = b.c2 ORDER BY a.c0"
 
+    qt_test "select ndv(c2) from ${tbName}; "
+
     sql "DROP TABLE ${tbName}"
 }