Refs #33517 -- Prevented __second lookup from returning fractional seconds on PostgreSQL.

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/db_functions/datetime/test_extract_trunc.py b/tests/db_functions/datetime/test_extract_trunc.py
index 67a4b81766..a01778c719 100644
--- a/tests/db_functions/datetime/test_extract_trunc.py
+++ b/tests/db_functions/datetime/test_extract_trunc.py
@@ -899,6 +899,22 @@ class DateFunctionTests(TestCase):
             2,
         )
 
+    def test_extract_second_func_no_fractional(self):
+        start_datetime = datetime(2015, 6, 15, 14, 30, 50, 321)
+        end_datetime = datetime(2016, 6, 15, 14, 30, 50, 783)
+        if settings.USE_TZ:
+            start_datetime = timezone.make_aware(start_datetime)
+            end_datetime = timezone.make_aware(end_datetime)
+        obj = self.create_model(start_datetime, end_datetime)
+        self.assertSequenceEqual(
+            DTModel.objects.filter(start_datetime__second=F("end_datetime__second")),
+            [obj],
+        )
+        self.assertSequenceEqual(
+            DTModel.objects.filter(start_time__second=F("end_time__second")),
+            [obj],
+        )
+
     def test_trunc_func(self):
         start_datetime = datetime(999, 6, 15, 14, 30, 50, 321)
         end_datetime = datetime(2016, 6, 15, 14, 10, 50, 123)