Should clear the primary keys cache also

activerecord/lib/active_record/connection_adapters/schema_cache.rb

@@ -34,6 +34,7 @@ def table_exists?(name)
       def clear!
         @columns.clear
         @columns_hash.clear
+        @primary_keys.clear
         @tables.clear
       end
 

activerecord/test/cases/connection_adapters/schema_cache_test.rb

@@ -26,14 +26,18 @@ def test_caches_columns_hash
         assert_equal columns_hash, @cache.columns_hash['posts']
       end
 
-      def test_clearing_column_cache
+      def test_clearing
         @cache.columns['posts']
         @cache.columns_hash['posts']
+        @cache.tables['posts']
+        @cache.primary_keys['posts']
 
         @cache.clear!
 
         assert_equal 0, @cache.columns.size
         assert_equal 0, @cache.columns_hash.size
+        assert_equal 0, @cache.tables.size
+        assert_equal 0, @cache.primary_keys.size
       end
     end
   end