BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	l_orderkey,
	sum(l_extendedprice * (1 - l_discount)) as revenue,
	o_orderdate,
	o_shippriority
from
	customer,
	orders,
	lineitem
where
	c_mktsegment = 'HOUSEHOLD'
	and c_custkey = o_custkey
	and l_orderkey = o_orderkey
	and o_orderdate < date '1995-03-11'
	and l_shipdate > date '1995-03-11'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2740969.26..2740969.29 rows=10 width=20) (actual time=143877.385..143877.389 rows=10 loops=1)
   Buffers: shared hit=742835 read=614920 dirtied=252
   ->  Sort  (cost=2740969.26..2748775.25 rows=3122394 width=20) (actual time=143877.382..143877.384 rows=10 loops=1)
         Sort Key: (sum((lineitem.l_extendedprice * (1::double precision - lineitem.l_discount)))), orders.o_orderdate
         Sort Method: top-N heapsort  Memory: 25kB
         Buffers: shared hit=742835 read=614920 dirtied=252
         ->  HashAggregate  (cost=2642271.51..2673495.45 rows=3122394 width=20) (actual time=143776.794..143854.374 rows=113104 loops=1)
               Buffers: shared hit=742829 read=614920 dirtied=252
               ->  Hash Join  (cost=623840.22..2595435.60 rows=3122394 width=20) (actual time=41336.337..143082.394 rows=298656 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=742829 read=614920 dirtied=252
                     ->  Seq Scan on lineitem  (cost=0.00..1818861.39 rows=32402682 width=12) (actual time=0.045..72560.931 rows=32466027 loops=1)
                           Filter: (l_shipdate > '1995-03-11'::date)
                           Rows Removed by Filter: 27579576
                           Buffers: shared hit=666949 read=400597
                     ->  Hash  (cost=605736.20..605736.20 rows=1448321 width=12) (actual time=41333.434..41333.434 rows=1450490 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62326kB
                           Buffers: shared hit=75880 read=214323 dirtied=252
                           ->  Hash Join  (cost=49676.60..605736.20 rows=1448321 width=12) (actual time=1693.475..40001.076 rows=1450490 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=75880 read=214323 dirtied=252
                                 ->  Seq Scan on orders  (cost=0.00..441649.60 rows=7267403 width=16) (actual time=0.017..18032.273 rows=7271855 loops=1)
                                       Filter: (o_orderdate < '1995-03-11'::date)
                                       Rows Removed by Filter: 7743145
                                       Buffers: shared hit=40605 read=213170 dirtied=252
                                 ->  Hash  (cost=45939.91..45939.91 rows=298935 width=4) (actual time=1693.253..1693.253 rows=299751 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10539kB
                                       Buffers: shared hit=35275 read=1153
                                       ->  Bitmap Heap Scan on customer  (cost=6925.23..45939.91 rows=298935 width=4) (actual time=229.537..1531.306 rows=299751 loops=1)
                                             Recheck Cond: (c_mktsegment = 'HOUSEHOLD'::bpchar)
                                             Buffers: shared hit=35275 read=1153
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6850.49 rows=298935 width=0) (actual time=212.671..212.671 rows=299751 loops=1)
                                                   Index Cond: (c_mktsegment = 'HOUSEHOLD'::bpchar)
                                                   Buffers: shared read=1153
 Total runtime: 143921.950 ms
(35 rows)

COMMIT;
COMMIT