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 '1995-03-04'
	and l_shipdate > date '1995-03-04'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2746311.60..2746311.62 rows=10 width=20) (actual time=103103.974..103103.977 rows=10 loops=1)
   Buffers: shared hit=1023383 read=335685 dirtied=1054 written=1549
   ->  Sort  (cost=2746311.60..2754205.25 rows=3157460 width=20) (actual time=103103.969..103103.971 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=1023383 read=335685 dirtied=1054 written=1549
         ->  HashAggregate  (cost=2646505.42..2678080.02 rows=3157460 width=20) (actual time=102978.103..103073.070 rows=113600 loops=1)
               Buffers: shared hit=1023377 read=335685 dirtied=1054 written=1549
               ->  Hash Join  (cost=624015.56..2599143.52 rows=3157460 width=20) (actual time=33423.305..102357.937 rows=299163 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1023377 read=335685 dirtied=1054 written=1549
                     ->  Seq Scan on lineitem  (cost=0.00..1820676.68 rows=32767115 width=12) (actual time=0.049..45251.201 rows=32640760 loops=1)
                           Filter: (l_shipdate > '1995-03-04'::date)
                           Rows Removed by Filter: 27404619
                           Buffers: shared hit=763348 read=305260 dirtied=1054 written=1549
                     ->  Hash  (cost=605893.80..605893.80 rows=1449741 width=12) (actual time=33421.188..33421.188 rows=1446111 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62138kB
                           Buffers: shared hit=260029 read=30425
                           ->  Hash Join  (cost=49746.29..605893.80 rows=1449741 width=12) (actual time=1778.004..32405.363 rows=1446111 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=260029 read=30425
                                 ->  Seq Scan on orders  (cost=0.00..442089.90 rows=7240742 width=16) (actual time=0.024..11232.652 rows=7227948 loops=1)
                                       Filter: (o_orderdate < '1995-03-04'::date)
                                       Rows Removed by Filter: 7787052
                                       Buffers: shared hit=231852 read=22176
                                 ->  Hash  (cost=45992.16..45992.16 rows=300330 width=4) (actual time=1777.730..1777.730 rows=299496 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10530kB
                                       Buffers: shared hit=28177 read=8249
                                       ->  Bitmap Heap Scan on customer  (cost=6960.04..45992.16 rows=300330 width=4) (actual time=223.661..1577.472 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Buffers: shared hit=28177 read=8249
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6884.96 rows=300330 width=0) (actual time=209.953..209.953 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1151
 Total runtime: 103141.756 ms
(35 rows)

COMMIT;
COMMIT