Feature for client side binding in schema_editor.

django/db/backends/base/features.py

@@ -172,6 +172,8 @@ class BaseDatabaseFeatures:
     # Can we roll back DDL in a transaction?
     can_rollback_ddl = False
 
+    schema_editor_uses_clientside_param_binding = False
+
     # Does it support operations requiring references rename in a transaction?
     supports_atomic_references_rename = True
 

django/db/backends/postgresql/features.py

@@ -26,6 +26,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     can_introspect_materialized_views = True
     can_distinct_on_fields = True
     can_rollback_ddl = True
+    schema_editor_uses_clientside_param_binding = True
     supports_combined_alters = True
     nulls_order_largest = True
     supports_group_column_alias = True

tests/schema/test_logging.py

@@ -1,36 +1,17 @@
-from unittest import skipIf, skipUnless
-
 from django.db import connection
 from django.test import TestCase
 
 
 class SchemaLoggerTests(TestCase):
-    @skipIf(
-        connection.vendor == "postgresql", reason="postgresql will merge on the client"
-    )
     def test_extra_args(self):
         editor = connection.schema_editor(collect_sql=True)
         sql = "SELECT * FROM foo WHERE id in (%s, %s)"
         params = [42, 1337]
         with self.assertLogs("django.db.backends.schema", "DEBUG") as cm:
             editor.execute(sql, params)
+        if connection.features.schema_editor_uses_clientside_param_binding:
+            sql = "SELECT * FROM foo WHERE id in (42, 1337)"
+            params = None
         self.assertEqual(cm.records[0].sql, sql)
         self.assertEqual(cm.records[0].params, params)
-        self.assertEqual(
-            cm.records[0].getMessage(),
-            "SELECT * FROM foo WHERE id in (%s, %s); (params [42, 1337])",
-        )
-
-    @skipUnless(
-        connection.vendor == "postgresql", reason="postgres will merge on the client"
-    )
-    def test_extra_args_psycopg(self):
-        editor = connection.schema_editor(collect_sql=True)
-        sql = "SELECT * FROM foo WHERE id in (%s, %s)"
-        params = [42, 1337]
-        with self.assertLogs("django.db.backends.schema", "DEBUG") as cm:
-            editor.execute(sql, params)
-        merged = "SELECT * FROM foo WHERE id in (42, 1337)"
-        self.assertEqual(cm.records[0].sql, merged)
-        self.assertEqual(cm.records[0].params, None)
-        self.assertEqual(cm.records[0].getMessage(), "%s; (params None)" % merged)
+        self.assertEqual(cm.records[0].getMessage(), f"{sql}; (params {params})")