Support using clause in DELETE statement

[ppputtyo]

DELETEにおけるusingに対応しました。

input

delete from tbl_a a
using tbl_b b, tbl_c c
where a.col1 = b.col1 and b.col2 > 10 and c.col3 = 'abc';

result

delete
from
	tbl_a	a
using
	tbl_b	b
,	tbl_c	c
where
	a.col1	=	b.col1
and	b.col2	>	10
and	c.col3	=	'abc'
;