Fixed #24296 -- Made QuerySet.exists() clear selected columns for not sliced distinct querysets.

2 files changed, 9 insertions, 1 deletions

diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
index a55eb84a17..64e7927f7a 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -562,7 +562,7 @@ class Query(BaseExpression):
 
     def exists(self, using, limit=True):
         q = self.clone()
-        if not q.distinct:
+        if not (q.distinct and q.is_sliced):
             if q.group_by is True:
                 q.add_fields(
                     (f.attname for f in self.model._meta.concrete_fields), False
diff --git a/tests/queries/tests.py b/tests/queries/tests.py
index 395a298a9e..77f0eb655c 100644
--- a/tests/queries/tests.py
+++ b/tests/queries/tests.py
@@ -2226,6 +2226,14 @@ class ExistsSql(TestCase):
         self.assertNotIn(id, qstr)
         self.assertNotIn(name, qstr)
 
+    def test_distinct_exists(self):
+        with CaptureQueriesContext(connection) as captured_queries:
+            self.assertIs(Article.objects.distinct().exists(), False)
+        self.assertEqual(len(captured_queries), 1)
+        captured_sql = captured_queries[0]["sql"]
+        self.assertNotIn(connection.ops.quote_name("id"), captured_sql)
+        self.assertNotIn(connection.ops.quote_name("name"), captured_sql)
+
     def test_sliced_distinct_exists(self):
         with CaptureQueriesContext(connection) as captured_queries:
             self.assertIs(Article.objects.distinct()[1:3].exists(), False)