create
    definer = `mysql.sys`@localhost function sys.format_statement(statement longtext) returns longtext comment '
Description
-----------

Formats a normalized statement, truncating it if it is > 64 characters long by default.

To configure the length to truncate the statement to by default, update the `statement_truncate_len`
variable with `sys_config` table to a different value. Alternatively, to change it just for just 
your particular session, use `SET @sys.statement_truncate_len := <some new value>`.

Useful for printing statement related data from Performance Schema from 
the command line.

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

statement (LONGTEXT): 
  The statement to format.

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

LONGTEXT

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

mysql> SELECT sys.format_statement(digest_text)
    ->   FROM performance_schema.events_statements_summary_by_digest
    ->  ORDER by sum_timer_wait DESC limit 5;
+-------------------------------------------------------------------+
| sys.format_statement(digest_text)                                 |
+-------------------------------------------------------------------+
| CREATE SQL SECURITY INVOKER VI ... KE ? AND `variable_value` > ?  |
| CREATE SQL SECURITY INVOKER VI ... ait` IS NOT NULL , `esc` . ... |
| CREATE SQL SECURITY INVOKER VI ... ait` IS NOT NULL , `sys` . ... |
| CREATE SQL SECURITY INVOKER VI ...  , `compressed_size` ) ) DESC  |
| CREATE SQL SECURITY INVOKER VI ... LIKE ? ORDER BY `timer_start`  |
+-------------------------------------------------------------------+
5 rows in set (0.00 sec)
' deterministic sql security invoker no sql
BEGIN
  -- Check if we have the configured length, if not, init it
  IF @sys.statement_truncate_len IS NULL THEN
      SET @sys.statement_truncate_len = sys_get_config('statement_truncate_len', 64);
  END IF;
  IF CHAR_LENGTH(statement) > @sys.statement_truncate_len THEN
      RETURN REPLACE(CONCAT(LEFT(statement, (@sys.statement_truncate_len/2)-2), ' ... ', RIGHT(statement, (@sys.statement_truncate_len/2)-2)), '\n', ' ');
  ELSE 
      RETURN REPLACE(statement, '\n', ' ');
  END IF;
END;