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 '1995-03-21'
	and l_shipdate > date '1995-03-21'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2553167.95..2553167.97 rows=10 width=20) (actual time=37523.154..37523.158 rows=10 loops=1)
   Buffers: shared hit=653953 read=714388 dirtied=1433 written=2105
   ->  Sort  (cost=2553167.95..2561106.27 rows=3175330 width=20) (actual time=37523.151..37523.153 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=653953 read=714388 dirtied=1433 written=2105
         ->  HashAggregate  (cost=2452796.91..2484550.21 rows=3175330 width=20) (actual time=37454.549..37502.096 rows=114136 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=653947 read=714388 dirtied=1433 written=2105
               ->  Hash Join  (cost=768740.93..2405166.96 rows=3175330 width=20) (actual time=8392.248..37161.235 rows=302122 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=653947 read=714388 dirtied=1433 written=2105
                     ->  Bitmap Heap Scan on lineitem  (cost=252263.24..1734944.73 rows=32530999 width=12) (actual time=120.120..22737.116 rows=32213674 loops=1)
                           Recheck Cond: (l_shipdate > '1995-03-21'::date)
                           Rows Removed by Index Recheck: 27830502
                           Heap Blocks: lossy=1076044
                           Buffers: shared hit=420073 read=656019 dirtied=925 written=528
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey_brin_idx  (cost=0.00..244130.49 rows=32530999 width=0) (actual time=119.362..119.362 rows=10760960 loops=1)
                                 Index Cond: (l_shipdate > '1995-03-21'::date)
                                 Buffers: shared hit=13 read=35 written=2
                     ->  Hash  (cost=497992.96..497992.96 rows=1478778 width=12) (actual time=8265.787..8265.787 rows=1470814 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 79584kB
                           Buffers: shared hit=233874 read=58369 dirtied=508 written=1577
                           ->  Hash Join  (cost=107119.16..497992.96 rows=1478778 width=12) (actual time=731.285..7793.074 rows=1470814 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=233874 read=58369 dirtied=508 written=1577
                                 ->  Bitmap Heap Scan on orders  (cost=57406.70..405734.64 rows=7402155 width=16) (actual time=29.253..4689.862 rows=7334767 loops=1)
                                       Recheck Cond: (o_orderdate < '1995-03-21'::date)
                                       Rows Removed by Index Recheck: 7680233
                                       Heap Blocks: lossy=255801
                                       Buffers: shared hit=233872 read=21940 dirtied=508 written=203
                                       ->  Bitmap Index Scan on orders_o_orderkey_o_orderdate_brin_idx  (cost=0.00..55556.17 rows=7402155 width=0) (actual time=29.092..29.092 rows=2558720 loops=1)
                                             Index Cond: (o_orderdate < '1995-03-21'::date)
                                             Buffers: shared hit=3 read=8
                                 ->  Hash  (cost=45966.64..45966.64 rows=299665 width=4) (actual time=700.069..700.069 rows=300276 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14653kB
                                       Buffers: shared hit=2 read=36429 written=1374
                                       ->  Bitmap Heap Scan on customer  (cost=6942.83..45966.64 rows=299665 width=4) (actual time=79.464..608.754 rows=300276 loops=1)
                                             Recheck Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                             Heap Blocks: exact=35277
                                             Buffers: shared hit=2 read=36429 written=1374
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6867.91 rows=299665 width=0) (actual time=70.576..70.576 rows=300276 loops=1)
                                                   Index Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                                   Buffers: shared read=1154 written=42
 Planning time: 3.688 ms
 Execution time: 37537.965 ms
(46 rows)

COMMIT;
COMMIT