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 '1995-03-03'
	and l_shipdate > date '1995-03-03'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2764718.09..2764718.12 rows=10 width=20) (actual time=66345.422..66345.427 rows=10 loops=1)
   Buffers: shared hit=742119 read=626162 written=1257
   ->  Sort  (cost=2764718.09..2772662.42 rows=3177733 width=20) (actual time=66345.418..66345.422 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=742119 read=626162 written=1257
         ->  HashAggregate  (cost=2664271.09..2696048.42 rows=3177733 width=20) (actual time=66252.411..66324.664 rows=113889 loops=1)
               Buffers: shared hit=742113 read=626162 written=1257
               ->  Hash Join  (cost=627833.42..2616605.10 rows=3177733 width=20) (actual time=24308.518..65896.713 rows=300529 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=742113 read=626162 written=1257
                     ->  Seq Scan on lineitem  (cost=0.00..1833355.58 rows=32970340 width=12) (actual time=0.066..21384.431 rows=32664054 loops=1)
                           Filter: (l_shipdate > '1995-03-03'::date)
                           Rows Removed by Filter: 27380122
                           Buffers: shared hit=486981 read=589065 written=18
                     ->  Hash  (cost=609581.21..609581.21 rows=1460177 width=12) (actual time=24306.351..24306.351 rows=1444241 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62058kB
                           Buffers: shared hit=255132 read=37097 written=1239
                           ->  Hash Join  (cost=49783.51..609581.21 rows=1460177 width=12) (actual time=902.014..23105.941 rows=1444241 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=255132 read=37097 written=1239
                                 ->  Seq Scan on orders  (cost=0.00..445175.49 rows=7274214 width=16) (actual time=0.012..5566.412 rows=7221951 loops=1)
                                       Filter: (o_orderdate < '1995-03-03'::date)
                                       Rows Removed by Filter: 7793049
                                       Buffers: shared hit=255130 read=671 written=111
                                 ->  Hash  (cost=46019.76..46019.76 rows=301100 width=4) (actual time=901.797..901.797 rows=300036 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10549kB
                                       Buffers: shared hit=2 read=36426 written=1128
                                       ->  Bitmap Heap Scan on customer  (cost=6978.01..46019.76 rows=301100 width=4) (actual time=72.784..772.156 rows=300036 loops=1)
                                             Recheck Cond: (c_mktsegment = 'AUTOMOBILE'::bpchar)
                                             Buffers: shared hit=2 read=36426 written=1128
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6902.73 rows=301100 width=0) (actual time=63.842..63.842 rows=300036 loops=1)
                                                   Index Cond: (c_mktsegment = 'AUTOMOBILE'::bpchar)
                                                   Buffers: shared read=1153 written=35
 Total runtime: 66390.355 ms
(35 rows)

COMMIT;
COMMIT