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 = 'BUILDING'
	and c_custkey = o_custkey
	and l_orderkey = o_orderkey
	and o_orderdate < date '1995-03-19'
	and l_shipdate > date '1995-03-19'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2777443.25..2777443.28 rows=10 width=20) (actual time=134403.628..134403.634 rows=10 loops=1)
   Buffers: shared hit=1176556 read=198330 written=2
   ->  Sort  (cost=2777443.25..2785400.59 rows=3182934 width=20) (actual time=134403.624..134403.625 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=1176556 read=198330 written=2
         ->  HashAggregate  (cost=2676831.85..2708661.19 rows=3182934 width=20) (actual time=134280.424..134376.577 rows=114089 loops=1)
               Buffers: shared hit=1176550 read=198330 written=2
               ->  Hash Join  (cost=632519.15..2629087.84 rows=3182934 width=20) (actual time=39135.361..133491.456 rows=301988 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1176550 read=198330 written=2
                     ->  Seq Scan on lineitem  (cost=0.00..1842434.86 rows=32614530 width=12) (actual time=0.046..65813.205 rows=32264790 loops=1)
                           Filter: (l_shipdate > '1995-03-19'::date)
                           Rows Removed by Filter: 27780003
                           Buffers: shared hit=899140 read=182242 written=2
                     ->  Hash  (cost=613946.23..613946.23 rows=1485834 width=12) (actual time=39133.116..39133.116 rows=1468337 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 63093kB
                           Buffers: shared hit=277410 read=16088
                           ->  Hash Join  (cost=49758.64..613946.23 rows=1485834 width=12) (actual time=1894.694..37599.096 rows=1468337 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=277410 read=16088
                                 ->  Seq Scan on orders  (cost=0.00..447376.99 rows=7414710 width=16) (actual time=0.020..15228.459 rows=7322165 loops=1)
                                       Filter: (o_orderdate < '1995-03-19'::date)
                                       Rows Removed by Filter: 7692835
                                       Buffers: shared hit=242246 read=14820
                                 ->  Hash  (cost=46001.33..46001.33 rows=300585 width=4) (actual time=1894.398..1894.398 rows=300276 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10557kB
                                       Buffers: shared hit=35164 read=1268
                                       ->  Bitmap Heap Scan on customer  (cost=6966.01..46001.33 rows=300585 width=4) (actual time=219.963..1726.075 rows=300276 loops=1)
                                             Recheck Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                             Buffers: shared hit=35164 read=1268
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6890.87 rows=300585 width=0) (actual time=205.994..205.994 rows=300276 loops=1)
                                                   Index Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                                   Buffers: shared read=1155
 Total runtime: 134460.676 ms
(35 rows)

COMMIT;
COMMIT