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 '1995-03-08'
	and l_shipdate > date '1995-03-08'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2759041.82..2759041.84 rows=10 width=20) (actual time=97292.366..97292.373 rows=10 loops=1)
   Buffers: shared hit=1067978 read=297673 dirtied=254 written=101
   ->  Sort  (cost=2759041.82..2766947.55 rows=3162291 width=20) (actual time=97292.362..97292.365 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=1067978 read=297673 dirtied=254 written=101
         ->  HashAggregate  (cost=2659082.94..2690705.85 rows=3162291 width=20) (actual time=97137.190..97254.936 rows=113961 loops=1)
               Buffers: shared hit=1067972 read=297673 dirtied=254 written=101
               ->  Hash Join  (cost=627183.65..2611648.57 rows=3162291 width=20) (actual time=31036.272..96545.474 rows=301633 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1067972 read=297673 dirtied=254 written=101
                     ->  Seq Scan on lineitem  (cost=0.00..1829723.76 rows=32831533 width=12) (actual time=0.052..40792.431 rows=32506958 loops=1)
                           Filter: (l_shipdate > '1995-03-08'::date)
                           Rows Removed by Filter: 27477561
                           Buffers: shared hit=788105 read=285813 written=9
                     ->  Hash  (cost=608979.42..608979.42 rows=1456338 width=12) (actual time=31033.818..31033.818 rows=1452939 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62431kB
                           Buffers: shared hit=279867 read=11860 dirtied=254 written=92
                           ->  Hash Join  (cost=49684.86..608979.42 rows=1456338 width=12) (actual time=1081.451..30004.506 rows=1452939 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=279867 read=11860 dirtied=254 written=92
                                 ->  Seq Scan on orders  (cost=0.00..444294.89 rows=7304458 width=16) (actual time=0.031..10121.049 rows=7246287 loops=1)
                                       Filter: (o_orderdate < '1995-03-08'::date)
                                       Rows Removed by Filter: 7753713
                                       Buffers: shared hit=253341 read=1954 dirtied=254 written=92
                                 ->  Hash  (cost=45946.55..45946.55 rows=299065 width=4) (actual time=1081.136..1081.136 rows=300276 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10557kB
                                       Buffers: shared hit=26526 read=9906
                                       ->  Bitmap Heap Scan on customer  (cost=6930.23..45946.55 rows=299065 width=4) (actual time=164.367..880.864 rows=300276 loops=1)
                                             Recheck Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                             Buffers: shared hit=26526 read=9906
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6855.47 rows=299065 width=0) (actual time=145.861..145.861 rows=300276 loops=1)
                                                   Index Cond: (c_mktsegment = 'BUILDING'::bpchar)
                                                   Buffers: shared read=1155
 Total runtime: 97529.441 ms
(35 rows)

COMMIT;
COMMIT