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 '1995-03-14'
	and l_shipdate > date '1995-03-14'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2775323.26..2775323.29 rows=10 width=20) (actual time=88561.246..88561.251 rows=10 loops=1)
   Buffers: shared hit=852734 read=522146 written=1432
   ->  Sort  (cost=2775323.26..2783201.16 rows=3151159 width=20) (actual time=88561.243..88561.246 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=852734 read=522146 written=1432
         ->  HashAggregate  (cost=2675716.26..2707227.85 rows=3151159 width=20) (actual time=88471.037..88540.513 rows=113400 loops=1)
               Buffers: shared hit=852728 read=522146 written=1432
               ->  Hash Join  (cost=631469.03..2628448.88 rows=3151159 width=20) (actual time=30159.331..87763.759 rows=298729 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=852728 read=522146 written=1432
                     ->  Seq Scan on lineitem  (cost=0.00..1842441.81 rows=32807051 width=12) (actual time=0.081..33754.684 rows=32390406 loops=1)
                           Filter: (l_shipdate > '1995-03-14'::date)
                           Rows Removed by Filter: 27654387
                           Buffers: shared hit=631748 read=449634
                     ->  Hash  (cost=613189.42..613189.42 rows=1462369 width=12) (actual time=30156.231..30156.231 rows=1458469 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62669kB
                           Buffers: shared hit=220980 read=72512 written=1432
                           ->  Hash Join  (cost=49575.50..613189.42 rows=1462369 width=12) (actual time=1286.264..28987.167 rows=1458469 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=220980 read=72512 written=1432
                                 ->  Seq Scan on orders  (cost=0.00..447376.99 rows=7390054 width=16) (actual time=0.015..9741.337 rows=7290640 loops=1)
                                       Filter: (o_orderdate < '1995-03-14'::date)
                                       Rows Removed by Filter: 7724360
                                       Buffers: shared hit=185710 read=71356 written=1270
                                 ->  Hash  (cost=45865.19..45865.19 rows=296825 width=4) (actual time=1286.069..1286.069 rows=299496 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10530kB
                                       Buffers: shared hit=35270 read=1156 written=162
                                       ->  Bitmap Heap Scan on customer  (cost=6876.87..45865.19 rows=296825 width=4) (actual time=181.829..1120.432 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Buffers: shared hit=35270 read=1156 written=162
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6802.67 rows=296825 width=0) (actual time=170.608..170.608 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1151 written=161
 Total runtime: 88599.564 ms
(35 rows)

COMMIT;
COMMIT