explain analyze
SELECT
	supplier.name,
	count(*) AS numwait
FROM
	supplier,
	lineitem l1,
	orders,
	nation
WHERE
	supplier.suppkey=l1.suppkey
	AND orders.orderkey=l1.orderkey
	AND orders.orderstatus='F'
	AND l1.receiptdate>l1.commitdate
	AND EXISTS(
		SELECT
			*
		FROM
			lineitem l2
		WHERE
			l2.orderkey=l1.orderkey
			AND l2.suppkey<>l1.suppkey
		)
	AND NOT EXISTS(
		SELECT
			*
		FROM
			lineitem l3
		WHERE
			l3.orderkey=l1.orderkey
			AND l3.suppkey<>l1.suppkey
			AND l3.receiptdate>l3.commitdate
		)
	AND supplier.nationkey=nation.nationkey
	AND nation.name='SAUDI ARABIA'
GROUP BY
	supplier.name
ORDER BY
	numwait DESC,
	supplier.name
LIMIT 100;