comparison core/modules/user/user.install @ 5:12f9dff5fda9 tip

Update to Drupal core 8.7.1

 function user_schema() {
   $schema['users_data'] = [
     'description' => 'Stores module data as key/value pairs per user.',
     'fields' => [
       'uid' => [
-        'description' => 'Primary key: {users}.uid for user.',
+        'description' => 'The {users}.uid this record affects.',
         'type' => 'int',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
       ],

     'indexes' => [
       'module' => ['module'],
       'name' => ['name'],
     ],
     'foreign keys' => [
-      'uid' => ['users' => 'uid'],
+      'data_user' => [
+        'table' => 'users',
+        'columns' => [
+          'uid' => 'uid',
+        ],
+      ],
     ],
   ];
 
   return $schema;
 }