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 = 'MACHINERY'
	and c_custkey = o_custkey
	and l_orderkey = o_orderkey
	and o_orderdate < date '1995-03-05'
	and l_shipdate > date '1995-03-05'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2539899.68..2539899.70 rows=10 width=20) (actual time=38327.996..38328.000 rows=10 loops=1)
   Buffers: shared hit=1230575 read=127238 written=1188
   ->  Sort  (cost=2539899.68..2547773.32 rows=3149459 width=20) (actual time=38327.993..38327.996 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=1230575 read=127238 written=1188
         ->  HashAggregate  (cost=2440346.41..2471841.00 rows=3149459 width=20) (actual time=38259.108..38306.978 rows=113474 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=1230569 read=127238 written=1188
               ->  Hash Join  (cost=763255.84..2393104.53 rows=3149459 width=20) (actual time=8329.850..37960.980 rows=299781 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1230569 read=127238 written=1188
                     ->  Bitmap Heap Scan on lineitem  (cost=253304.06..1729163.28 rows=32665298 width=12) (actual time=120.642..23753.290 rows=32615916 loops=1)
                           Recheck Cond: (l_shipdate > '1995-03-05'::date)
                           Rows Removed by Index Recheck: 27429687
                           Heap Blocks: lossy=1067543
                           Buffers: shared hit=977062 read=90529 written=1188
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey_brin_idx  (cost=0.00..245137.73 rows=32665298 width=0) (actual time=119.885..119.885 rows=10676480 loops=1)
                                 Index Cond: (l_shipdate > '1995-03-05'::date)
                                 Buffers: shared hit=48
                     ->  Hash  (cost=491837.66..491837.66 rows=1449130 width=12) (actual time=8202.789..8202.789 rows=1446355 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 78533kB
                           Buffers: shared hit=253507 read=36709
                           ->  Hash Join  (cost=105898.20..491837.66 rows=1449130 width=12) (actual time=1048.882..7717.586 rows=1446355 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=253507 read=36709
                                 ->  Bitmap Heap Scan on orders  (cost=56161.04..400453.86 rows=7241425 width=16) (actual time=27.329..4343.973 rows=7234339 loops=1)
                                       Recheck Cond: (o_orderdate < '1995-03-05'::date)
                                       Rows Removed by Index Recheck: 7780661
                                       Heap Blocks: lossy=253775
                                       Buffers: shared hit=253453 read=333
                                       ->  Bitmap Index Scan on orders_o_orderkey_o_orderdate_brin_idx  (cost=0.00..54350.69 rows=7241425 width=0) (actual time=27.171..27.171 rows=2538240 loops=1)
                                             Index Cond: (o_orderdate < '1995-03-05'::date)
                                             Buffers: shared hit=11
                                 ->  Hash  (cost=45984.97..45984.97 rows=300175 width=4) (actual time=1019.559..1019.559 rows=300441 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14659kB
                                       Buffers: shared hit=54 read=36376
                                       ->  Bitmap Heap Scan on customer  (cost=6954.78..45984.97 rows=300175 width=4) (actual time=77.281..923.495 rows=300441 loops=1)
                                             Recheck Cond: (c_mktsegment = 'MACHINERY'::bpchar)
                                             Heap Blocks: exact=35276
                                             Buffers: shared hit=54 read=36376
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6879.74 rows=300175 width=0) (actual time=66.945..66.945 rows=300441 loops=1)
                                                   Index Cond: (c_mktsegment = 'MACHINERY'::bpchar)
                                                   Buffers: shared read=1154
 Planning time: 3.153 ms
 Execution time: 38342.638 ms
(46 rows)

COMMIT;
COMMIT