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 = 'FURNITURE'
	and c_custkey = o_custkey
	and l_orderkey = o_orderkey
	and o_orderdate < date '1995-03-15'
	and l_shipdate > date '1995-03-15'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2770510.03..2770510.06 rows=10 width=20) (actual time=153425.209..153425.214 rows=10 loops=1)
   Buffers: shared hit=720929 read=651325 dirtied=252 written=17
   ->  Sort  (cost=2770510.03..2778399.45 rows=3155766 width=20) (actual time=153425.205..153425.207 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=720929 read=651325 dirtied=252 written=17
         ->  HashAggregate  (cost=2670757.40..2702315.06 rows=3155766 width=20) (actual time=153324.863..153402.039 rows=113413 loops=1)
               Buffers: shared hit=720923 read=651325 dirtied=252 written=17
               ->  Hash Join  (cost=630567.69..2623420.91 rows=3155766 width=20) (actual time=37972.784..152343.044 rows=298794 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=720923 read=651325 dirtied=252 written=17
                     ->  Seq Scan on lineitem  (cost=0.00..1838822.86 rows=32659387 width=12) (actual time=0.041..85073.479 rows=32364828 loops=1)
                           Filter: (l_shipdate > '1995-03-15'::date)
                           Rows Removed by Filter: 27680469
                           Buffers: shared hit=429524 read=649738
                     ->  Hash  (cost=612214.78..612214.78 rows=1468233 width=12) (actual time=37970.535..37970.535 rows=1459885 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62730kB
                           Buffers: shared hit=291399 read=1587 dirtied=252 written=17
                           ->  Hash Join  (cost=49665.89..612214.78 rows=1468233 width=12) (actual time=1668.856..36724.878 rows=1459885 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=291399 read=1587 dirtied=252 written=17
                                 ->  Seq Scan on orders  (cost=0.00..446496.39 rows=7372376 width=16) (actual time=0.019..13451.506 rows=7297127 loops=1)
                                       Filter: (o_orderdate < '1995-03-15'::date)
                                       Rows Removed by Filter: 7717873
                                       Buffers: shared hit=256124 read=436 dirtied=252
                                 ->  Hash  (cost=45931.76..45931.76 rows=298730 width=4) (actual time=1668.620..1668.620 rows=299496 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10530kB
                                       Buffers: shared hit=35275 read=1151 written=17
                                       ->  Bitmap Heap Scan on customer  (cost=6919.64..45931.76 rows=298730 width=4) (actual time=225.498..1499.039 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Buffers: shared hit=35275 read=1151 written=17
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6844.96 rows=298730 width=0) (actual time=208.361..208.361 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1151 written=17
 Total runtime: 153472.371 ms
(35 rows)

COMMIT;
COMMIT