2 files changed, 12 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index e785cc6fea..4792f824cf 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -391,6 +391,7 @@ module ActiveRecord
 
       # Set the authorized user for this session
       def session_auth=(user)
+        clear_cache!
         exec "SET SESSION AUTHORIZATION #{user}"
       end
 
diff --git a/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb b/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
index dc4f8fb955..881631fb19 100644
--- a/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
@@ -50,6 +50,17 @@ class SchemaAuthorizationTest < ActiveRecord::TestCase
     end
   end
 
+  def test_setting_auth_clears_stmt_cache
+    assert_nothing_raised do
+      set_session_auth
+      USERS.each do |u|
+        set_session_auth u
+        assert_equal u, @connection.exec("SELECT name FROM #{TABLE_NAME} WHERE id = $1", 'SQL', [[nil, 1]]).first['name']
+        set_session_auth
+      end
+    end
+  end
+
   def test_auth_with_bind
     assert_nothing_raised do
       set_session_auth