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 = 'AUTOMOBILE'
	and c_custkey = o_custkey
	and l_orderkey = o_orderkey
	and o_orderdate < date '1995-03-01'
	and l_shipdate > date '1995-03-01'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2570139.70..2570139.73 rows=10 width=20) (actual time=33107.835..33107.837 rows=10 loops=1)
   Buffers: shared hit=1228064 read=144248 written=198
   ->  Sort  (cost=2570139.70..2578125.40 rows=3194280 width=20) (actual time=33107.832..33107.834 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=1228064 read=144248 written=198
         ->  HashAggregate  (cost=2469169.66..2501112.46 rows=3194280 width=20) (actual time=33033.909..33086.701 rows=113722 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=1228058 read=144248 written=198
               ->  Hash Join  (cost=771487.02..2421255.46 rows=3194280 width=20) (actual time=10242.833..32786.133 rows=300105 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1228058 read=144248 written=198
                     ->  Bitmap Heap Scan on lineitem  (cost=257002.38..1750543.64 rows=33142501 width=12) (actual time=120.596..16832.100 rows=32682105 loops=1)
                           Recheck Cond: (l_shipdate > '1995-03-01'::date)
                           Rows Removed by Index Recheck: 27303433
                           Heap Blocks: lossy=1079260
                           Buffers: shared hit=1077049 read=2259 written=9
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey_brin_idx  (cost=0.00..248716.75 rows=33142501 width=0) (actual time=119.839..119.839 rows=10792960 loops=1)
                                 Index Cond: (l_shipdate > '1995-03-01'::date)
                                 Buffers: shared hit=13 read=35
                     ->  Hash  (cost=496178.54..496178.54 rows=1464488 width=12) (actual time=10112.185..10112.185 rows=1440263 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 78271kB
                           Buffers: shared hit=151009 read=141989 written=189
                           ->  Hash Join  (cost=106377.34..496178.54 rows=1464488 width=12) (actual time=725.707..9519.555 rows=1440263 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=151009 read=141989 written=189
                                 ->  Bitmap Heap Scan on orders  (cost=56601.32..404389.26 rows=7298235 width=16) (actual time=27.669..5958.461 rows=7202147 loops=1)
                                       Recheck Cond: (o_orderdate < '1995-03-01'::date)
                                       Rows Removed by Index Recheck: 7797853
                                       Heap Blocks: lossy=256560
                                       Buffers: shared hit=151007 read=105564 written=65
                                       ->  Bitmap Index Scan on orders_o_orderkey_o_orderdate_brin_idx  (cost=0.00..54776.77 rows=7298235 width=0) (actual time=27.509..27.509 rows=2566400 loops=1)
                                             Index Cond: (o_orderdate < '1995-03-01'::date)
                                             Buffers: shared hit=3 read=8
                                 ->  Hash  (cost=46013.58..46013.58 rows=300995 width=4) (actual time=695.630..695.630 rows=300036 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14645kB
                                       Buffers: shared hit=2 read=36425 written=124
                                       ->  Bitmap Heap Scan on customer  (cost=6973.14..46013.58 rows=300995 width=4) (actual time=76.103..602.488 rows=300036 loops=1)
                                             Recheck Cond: (c_mktsegment = 'AUTOMOBILE'::bpchar)
                                             Heap Blocks: exact=35275
                                             Buffers: shared hit=2 read=36425 written=124
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6897.89 rows=300995 width=0) (actual time=67.193..67.193 rows=300036 loops=1)
                                                   Index Cond: (c_mktsegment = 'AUTOMOBILE'::bpchar)
                                                   Buffers: shared read=1152 written=3
 Planning time: 3.703 ms
 Execution time: 33128.221 ms
(46 rows)

COMMIT;
COMMIT