MDEV-9077 add sys_schema from https://github.com/mysql/mysql-sys

scripts/sys_schema/functions/ps_is_account_enabled.sql

@@ -0,0 +1,69 @@
+-- Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; version 2 of the License.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+DROP FUNCTION IF EXISTS ps_is_account_enabled;
+
+DELIMITER $$
+
+CREATE DEFINER='root'@'localhost' FUNCTION ps_is_account_enabled (
+        in_host VARCHAR(60), 
+        in_user VARCHAR(16)
+    ) 
+    RETURNS ENUM('YES', 'NO')
+    COMMENT '
+             Description
+             -----------
+
+             Determines whether instrumentation of an account is enabled 
+             within Performance Schema.
+
+             Parameters
+             -----------
+
+             in_host VARCHAR(60): 
+               The hostname of the account to check.
+             in_user (VARCHAR(16)):
+               The username of the account to check.
+
+             Returns
+             -----------
+
+             ENUM(\'YES\', \'NO\', \'PARTIAL\')
+
+             Example
+             -----------
+
+             mysql> SELECT sys.ps_is_account_enabled(\'localhost\', \'root\');
+             +------------------------------------------------+
+             | sys.ps_is_account_enabled(\'localhost\', \'root\') |
+             +------------------------------------------------+
+             | YES                                            |
+             +------------------------------------------------+
+             1 row in set (0.01 sec)
+            '
+    SQL SECURITY INVOKER
+    DETERMINISTIC 
+    READS SQL DATA 
+BEGIN
+    RETURN IF(EXISTS(SELECT 1
+                       FROM performance_schema.setup_actors
+                      WHERE (`HOST` = '%' OR in_host LIKE `HOST`)
+                        AND (`USER` = '%' OR `USER` = in_user)
+                    ),
+              'YES', 'NO'
+           );
+END$$
+
+DELIMITER ;