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 '1995-03-19'
	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=2764023.16..2764023.18 rows=10 width=20) (actual time=64406.147..64406.152 rows=10 loops=1)
   Buffers: shared hit=611672 read=756607 dirtied=253 written=10180
   ->  Sort  (cost=2764023.16..2771935.21 rows=3164819 width=20) (actual time=64406.144..64406.146 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=611672 read=756607 dirtied=253 written=10180
         ->  HashAggregate  (cost=2663984.37..2695632.56 rows=3164819 width=20) (actual time=64272.554..64370.871 rows=113360 loops=1)
               Buffers: shared hit=611666 read=756607 dirtied=253 written=10180
               ->  Hash Join  (cost=629423.09..2616512.08 rows=3164819 width=20) (actual time=22525.705..63910.660 rows=298841 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=611666 read=756607 dirtied=253 written=10180
                     ->  Seq Scan on lineitem  (cost=0.00..1833355.58 rows=32556061 width=12) (actual time=0.037..21712.454 rows=32263531 loops=1)
                           Filter: (l_shipdate > '1995-03-19'::date)
                           Rows Removed by Filter: 27780645
                           Buffers: shared hit=341020 read=735026 dirtied=1 written=1
                     ->  Hash  (cost=611013.74..611013.74 rows=1472748 width=12) (actual time=22523.842..22523.842 rows=1464869 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62944kB
                           Buffers: shared hit=270646 read=21581 dirtied=252 written=10179
                           ->  Hash Join  (cost=49708.91..611013.74 rows=1472748 width=12) (actual time=709.099..21859.465 rows=1464869 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=270646 read=21581 dirtied=252 written=10179
                                 ->  Seq Scan on orders  (cost=0.00..445175.49 rows=7374681 width=16) (actual time=0.012..5301.181 rows=7322352 loops=1)
                                       Filter: (o_orderdate < '1995-03-19'::date)
                                       Rows Removed by Filter: 7692648
                                       Buffers: shared hit=255391 read=410 dirtied=252 written=95
                                 ->  Hash  (cost=45964.47..45964.47 rows=299555 width=4) (actual time=708.899..708.899 rows=299496 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10530kB
                                       Buffers: shared hit=15255 read=21171 written=10084
                                       ->  Bitmap Heap Scan on customer  (cost=6942.03..45964.47 rows=299555 width=4) (actual time=78.094..605.794 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Buffers: shared hit=15255 read=21171 written=10084
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6867.14 rows=299555 width=0) (actual time=68.910..68.910 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1151 written=389
 Total runtime: 64444.909 ms
(35 rows)

COMMIT;
COMMIT