BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-12-01'
	and o_orderdate < cast(date '1993-12-01' + interval '3 month' as date)
	and exists (
		select
			*
		from
			lineitem
		where
			l_orderkey = o_orderkey
			and l_commitdate < l_receiptdate
	)
group by
	o_orderpriority
order by
	o_orderpriority;
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=1290646.88..1290646.89 rows=1 width=16) (actual time=87931.012..87931.013 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=987935 read=524975 dirtied=1438 written=380
   ->  HashAggregate  (cost=1290646.86..1290646.87 rows=1 width=16) (actual time=87930.854..87930.855 rows=5 loops=1)
         Buffers: shared hit=987930 read=524975 dirtied=1438 written=380
         ->  Hash Join  (cost=1021552.21..1289896.12 rows=150149 width=16) (actual time=76673.146..87580.656 rows=514249 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=987930 read=524975 dirtied=1438 written=380
               ->  Bitmap Heap Scan on orders  (cost=11881.96..274821.90 rows=560396 width=20) (actual time=531.565..2503.505 rows=560913 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-12-01'::date) AND (o_orderdate < '1994-03-01'::date))
                     Buffers: shared hit=226486 read=2853 written=209
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11741.86 rows=560396 width=0) (actual time=363.123..363.123 rows=563212 loops=1)
                           Index Cond: ((o_orderdate >= '1993-12-01'::date) AND (o_orderdate < '1994-03-01'::date))
                           Buffers: shared hit=77 read=1460
               ->  Hash  (cost=992840.73..992840.73 rows=1346362 width=4) (actual time=76139.164..76139.164 rows=13767198 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484004kB
                     Buffers: shared hit=761444 read=522122 dirtied=1438 written=171
                     ->  HashAggregate  (cost=979377.11..992840.73 rows=1346362 width=4) (actual time=62151.147..72091.562 rows=13767198 loops=1)
                           Buffers: shared hit=761444 read=522122 dirtied=1438 written=171
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..929138.65 rows=20095383 width=4) (actual time=0.181..29736.599 rows=37966982 loops=1)
                                 Buffers: shared hit=761444 read=522122 dirtied=1438 written=171
 Total runtime: 88165.143 ms
(23 rows)

COMMIT;
COMMIT