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 '1995-03-10'
	and l_shipdate > date '1995-03-10'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2700741.36..2700741.38 rows=10 width=20) (actual time=32708.518..32708.521 rows=10 loops=1)
   Buffers: shared hit=1022492 read=350342 dirtied=833 written=5997
   ->  Sort  (cost=2700741.36..2708712.67 rows=3188524 width=20) (actual time=32708.512..32708.512 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=1022492 read=350342 dirtied=833 written=5997
         ->  HashAggregate  (cost=2599953.26..2631838.50 rows=3188524 width=20) (actual time=32653.047..32689.810 rows=113392 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=1022486 read=350342 dirtied=833 written=5997
               ->  Hash Join  (cost=556885.13..2552125.40 rows=3188524 width=20) (actual time=8951.547..32412.267 rows=299035 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1022486 read=350342 dirtied=833 written=5997
                     ->  Seq Scan on lineitem  (cost=0.00..1839823.65 rows=32941700 width=12) (actual time=0.031..17790.162 rows=32457285 loops=1)
                           Filter: (l_shipdate > '1995-03-10'::date)
                           Rows Removed by Filter: 27528253
                           Buffers: shared hit=842567 read=237276 dirtied=616 written=461
                     ->  Hash  (cost=538500.63..538500.63 rows=1470760 width=12) (actual time=8938.757..8938.757 rows=1452285 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 78787kB
                           Buffers: shared hit=179919 read=113066 dirtied=217 written=5536
                           ->  Hash Join  (cost=49737.81..538500.63 rows=1470760 width=12) (actual time=511.835..8383.717 rows=1452285 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=179919 read=113066 dirtied=217 written=5536
                                 ->  Seq Scan on orders  (cost=0.00..446496.39 rows=7349022 width=16) (actual time=0.031..5429.390 rows=7258690 loops=1)
                                       Filter: (o_orderdate < '1995-03-10'::date)
                                       Rows Removed by Filter: 7741310
                                       Buffers: shared hit=144644 read=111916 dirtied=217 written=5443
                                 ->  Hash  (cost=45985.38..45985.38 rows=300195 width=4) (actual time=509.008..509.008 rows=299496 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14626kB
                                       Buffers: shared hit=35275 read=1150 written=93
                                       ->  Bitmap Heap Scan on customer  (cost=6954.94..45985.38 rows=300195 width=4) (actual time=77.918..421.905 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Heap Blocks: exact=35275
                                             Buffers: shared hit=35275 read=1150 written=93
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6879.89 rows=300195 width=0) (actual time=68.679..68.679 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1150 written=93
 Planning time: 3.922 ms
 Execution time: 32734.034 ms
(38 rows)

COMMIT;
COMMIT