create
    definer = `mysql.sys`@localhost function sys.format_path(in_path varchar(512)) returns varchar(512) comment '
Description
-----------

Takes a raw path value, and strips out the datadir or tmpdir
replacing with @@datadir and @@tmpdir respectively.

Also normalizes the paths across operating systems, so backslashes
on Windows are converted to forward slashes

Parameters
-----------

path (VARCHAR(512)):
  The raw file path value to format.

Returns
-----------

VARCHAR(512) CHARSET UTF8MB4

Example
-----------

mysql> select @@datadir;
+-----------------------------------------------+
| @@datadir                                     |
+-----------------------------------------------+
| /Users/mark/sandboxes/SmallTree/AMaster/data/ |
+-----------------------------------------------+
1 row in set (0.06 sec)

mysql> select format_path(''/Users/mark/sandboxes/SmallTree/AMaster/data/mysql/proc.MYD'') AS path;
+--------------------------+
| path                     |
+--------------------------+
| @@datadir/mysql/proc.MYD |
+--------------------------+
1 row in set (0.03 sec)
' deterministic sql security invoker no sql
BEGIN
  DECLARE v_path VARCHAR(512);
  DECLARE v_undo_dir VARCHAR(1024);
  DECLARE path_separator CHAR(1) DEFAULT '/';
  IF @@global.version_compile_os LIKE 'win%' THEN
    SET path_separator = '\\';
  END IF;
  -- OSX hides /private/ in variables, but Performance Schema does not
  IF in_path LIKE '/private/%' THEN
    SET v_path = REPLACE(in_path, '/private', '');
  ELSE
    SET v_path = in_path;
  END IF;
  -- @@global.innodb_undo_directory is only set when separate undo logs are used
  SET v_undo_dir = IFNULL((SELECT VARIABLE_VALUE FROM performance_schema.global_variables WHERE VARIABLE_NAME = 'innodb_undo_directory'), '');
  IF v_path IS NULL THEN
    RETURN NULL;
  ELSEIF v_path LIKE CONCAT(@@global.datadir, IF(SUBSTRING(@@global.datadir, -1) = path_separator, '%', CONCAT(path_separator, '%'))) ESCAPE '|' THEN
    SET v_path = REPLACE(v_path, @@global.datadir, CONCAT('@@datadir', IF(SUBSTRING(@@global.datadir, -1) = path_separator, path_separator, '')));
  ELSEIF v_path LIKE CONCAT(@@global.tmpdir, IF(SUBSTRING(@@global.tmpdir, -1) = path_separator, '%', CONCAT(path_separator, '%'))) ESCAPE '|' THEN
    SET v_path = REPLACE(v_path, @@global.tmpdir, CONCAT('@@tmpdir', IF(SUBSTRING(@@global.tmpdir, -1) = path_separator, path_separator, '')));
  ELSEIF v_path LIKE CONCAT(@@global.replica_load_tmpdir, IF(SUBSTRING(@@global.replica_load_tmpdir, -1) = path_separator, '%', CONCAT(path_separator, '%'))) ESCAPE '|' THEN
    SET v_path = REPLACE(v_path, @@global.replica_load_tmpdir, CONCAT('@@replica_load_tmpdir', IF(SUBSTRING(@@global.replica_load_tmpdir, -1) = path_separator, path_separator, '')));
  ELSEIF v_path LIKE CONCAT(@@global.innodb_data_home_dir, IF(SUBSTRING(@@global.innodb_data_home_dir, -1) = path_separator, '%', CONCAT(path_separator, '%'))) ESCAPE '|' THEN
    SET v_path = REPLACE(v_path, @@global.innodb_data_home_dir, CONCAT('@@innodb_data_home_dir', IF(SUBSTRING(@@global.innodb_data_home_dir, -1) = path_separator, path_separator, '')));
  ELSEIF v_path LIKE CONCAT(@@global.innodb_log_group_home_dir, IF(SUBSTRING(@@global.innodb_log_group_home_dir, -1) = path_separator, '%', CONCAT(path_separator, '%'))) ESCAPE '|' THEN
    SET v_path = REPLACE(v_path, @@global.innodb_log_group_home_dir, CONCAT('@@innodb_log_group_home_dir', IF(SUBSTRING(@@global.innodb_log_group_home_dir, -1) = path_separator, path_separator, '')));
  ELSEIF v_path LIKE CONCAT(v_undo_dir, IF(SUBSTRING(v_undo_dir, -1) = path_separator, '%', CONCAT(path_separator, '%'))) ESCAPE '|' THEN
    SET v_path = REPLACE(v_path, v_undo_dir, CONCAT('@@innodb_undo_directory', IF(SUBSTRING(v_undo_dir, -1) = path_separator, path_separator, '')));
  ELSEIF v_path LIKE CONCAT(@@global.basedir, IF(SUBSTRING(@@global.basedir, -1) = path_separator, '%', CONCAT(path_separator, '%'))) ESCAPE '|' THEN
    SET v_path = REPLACE(v_path, @@global.basedir, CONCAT('@@basedir', IF(SUBSTRING(@@global.basedir, -1) = path_separator, path_separator, '')));
  END IF;
  RETURN v_path;
END;