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 '1995-03-16'
	and l_shipdate > date '1995-03-16'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2740610.78..2740610.80 rows=10 width=20) (actual time=83463.179..83463.183 rows=10 loops=1)
   Buffers: shared hit=682169 read=675584 dirtied=298 written=64
   ->  Sort  (cost=2740610.78..2748391.73 rows=3112382 width=20) (actual time=83463.175..83463.176 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=682169 read=675584 dirtied=298 written=64
         ->  HashAggregate  (cost=2642229.50..2673353.32 rows=3112382 width=20) (actual time=83372.861..83441.875 rows=113477 loops=1)
               Buffers: shared hit=682163 read=675584 dirtied=298 written=64
               ->  Hash Join  (cost=624246.18..2595543.77 rows=3112382 width=20) (actual time=31028.825..82845.354 rows=299069 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=682163 read=675584 dirtied=298 written=64
                     ->  Seq Scan on lineitem  (cost=0.00..1818868.26 rows=32348136 width=12) (actual time=0.063..28747.870 rows=32340889 loops=1)
                           Filter: (l_shipdate > '1995-03-16'::date)
                           Rows Removed by Filter: 27704714
                           Buffers: shared hit=576268 read=491278 dirtied=46 written=46
                     ->  Hash  (cost=606169.79..606169.79 rows=1446111 width=12) (actual time=31026.711..31026.711 rows=1461146 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62784kB
                           Buffers: shared hit=105895 read=184306 dirtied=252 written=18
                           ->  Hash Join  (cost=49575.50..606169.79 rows=1446111 width=12) (actual time=1931.326..29612.583 rows=1461146 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=105895 read=184306 dirtied=252 written=18
                                 ->  Seq Scan on orders  (cost=0.00..441649.60 rows=7307897 width=16) (actual time=0.014..8460.239 rows=7303203 loops=1)
                                       Filter: (o_orderdate < '1995-03-16'::date)
                                       Rows Removed by Filter: 7711797
                                       Buffers: shared hit=70620 read=183155 dirtied=252 written=18
                                 ->  Hash  (cost=45865.19..45865.19 rows=296825 width=4) (actual time=1931.130..1931.130 rows=299496 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10530kB
                                       Buffers: shared hit=35275 read=1151
                                       ->  Bitmap Heap Scan on customer  (cost=6876.87..45865.19 rows=296825 width=4) (actual time=191.911..643.636 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Buffers: shared hit=35275 read=1151
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6802.67 rows=296825 width=0) (actual time=175.779..175.779 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1151
 Total runtime: 83527.086 ms
(35 rows)

COMMIT;
COMMIT