Union with order and limit

[m-larin]

Query:

SELECT id FROM table1 
UNION 
SELECT id FROM table2 
ORDER BY id ASC 
LIMIT 55

normally parsed, but when calling toString, order and limit are reversed. ToString result:

SELECT id FROM table1 
UNION 
SELECT id FROM table2 
LIMIT 55
ORDER BY id ASC 

Result of toString is failed on database.

If in source query add brackets:

(SELECT id FROM table1 
UNION 
SELECT id FROM table2) 
ORDER BY id ASC 
LIMIT 55

Method toString work correct, but it is not always possible to add brackets to the original query.