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 = 'BUILDING'
	and c_custkey = o_custkey
	and l_orderkey = o_orderkey
	and o_orderdate < date '1995-03-23'
	and l_shipdate > date '1995-03-23'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2534328.93..2534328.95 rows=10 width=20) (actual time=36101.546..36101.550 rows=10 loops=1)
   Buffers: shared hit=1038722 read=320407 dirtied=210 written=504
   ->  Sort  (cost=2534328.93..2542206.10 rows=3150867 width=20) (actual time=36101.543..36101.545 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=1038722 read=320407 dirtied=210 written=504
         ->  HashAggregate  (cost=2434731.16..2466239.83 rows=3150867 width=20) (actual time=36036.011..36080.095 rows=114110 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=1038716 read=320407 dirtied=210 written=504
               ->  Hash Join  (cost=763508.90..2387468.15 rows=3150867 width=20) (actual time=12450.348..35780.713 rows=301967 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1038716 read=320407 dirtied=210 written=504
                     ->  Bitmap Heap Scan on lineitem  (cost=249982.04..1721545.18 rows=32236651 width=12) (actual time=118.310..17897.215 rows=32165382 loops=1)
                           Recheck Cond: (l_shipdate > '1995-03-23'::date)
                           Rows Removed by Index Recheck: 27879997
                           Heap Blocks: lossy=1068605
                           Buffers: shared hit=1034731 read=33922
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey_brin_idx  (cost=0.00..241922.88 rows=32236651 width=0) (actual time=117.578..117.578 rows=10686720 loops=1)
                                 Index Cond: (l_shipdate > '1995-03-23'::date)
                                 Buffers: shared hit=48
                     ->  Hash  (cost=495145.36..495145.36 rows=1470520 width=12) (actual time=12323.110..12323.110 rows=1473283 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 79690kB
                           Buffers: shared hit=3985 read=286485 dirtied=210 written=504
                           ->  Hash Join  (cost=106798.82..495145.36 rows=1470520 width=12) (actual time=803.603..11736.894 rows=1473283 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=3985 read=286485 dirtied=210 written=504
                                 ->  Bitmap Heap Scan on orders  (cost=57086.36..403124.63 rows=7360821 width=16) (actual time=33.285..8109.150 rows=7347063 loops=1)
                                       Recheck Cond: (o_orderdate < '1995-03-23'::date)
                                       Rows Removed by Index Recheck: 7667937
                                       Heap Blocks: lossy=254028
                                       Buffers: shared hit=3983 read=250056 dirtied=210 written=480
                                       ->  Bitmap Index Scan on orders_o_orderkey_o_orderdate_brin_idx  (cost=0.00..55246.16 rows=7360821 width=0) (actual time=33.125..33.125 rows=2540800 loops=1)
                                             Index Cond: (o_orderdate < '1995-03-23'::date)
                                             Buffers: shared hit=3 read=8
                                 ->  Hash  (cost=45966.64..45966.64 rows=299665 width=4) (actual time=768.025..768.025 rows=300276 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14653kB
                                       Buffers: shared hit=2 read=36429 written=24
                                       ->  Bitmap Heap Scan on customer  (cost=6942.83..45966.64 rows=299665 width=4) (actual time=77.795..667.457 rows=300276 loops=1)
                                             Recheck Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                             Heap Blocks: exact=35277
                                             Buffers: shared hit=2 read=36429 written=24
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6867.91 rows=299665 width=0) (actual time=68.983..68.983 rows=300276 loops=1)
                                                   Index Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                                   Buffers: shared read=1154
 Planning time: 3.357 ms
 Execution time: 36115.829 ms
(46 rows)

COMMIT;
COMMIT