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 '1995-03-13'
	and l_shipdate > date '1995-03-13'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                              QUERY PLAN                                                                                               
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2747433.62..2747433.64 rows=10 width=20) (actual time=82610.182..82610.187 rows=10 loops=1)
   Buffers: shared hit=662552 read=697829 dirtied=296 written=1
   ->  Sort  (cost=2747433.62..2755286.22 rows=3141042 width=20) (actual time=82610.177..82610.179 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=662552 read=697829 dirtied=296 written=1
         ->  HashAggregate  (cost=2648146.41..2679556.83 rows=3141042 width=20) (actual time=82512.696..82588.456 rows=113869 loops=1)
               Buffers: shared hit=662546 read=697829 dirtied=296 written=1
               ->  Hash Join  (cost=625317.66..2601030.78 rows=3141042 width=20) (actual time=24952.831..81976.537 rows=300600 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=662546 read=697829 dirtied=296 written=1
                     ->  Seq Scan on lineitem  (cost=0.00..1822487.01 rows=32484182 width=12) (actual time=0.053..33005.605 rows=32415857 loops=1)
                           Filter: (l_shipdate > '1995-03-13'::date)
                           Rows Removed by Filter: 27629446
                           Buffers: shared hit=390021 read=679645 written=1
                     ->  Hash  (cost=607115.00..607115.00 rows=1456213 width=12) (actual time=24950.301..24950.301 rows=1456729 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62594kB
                           Buffers: shared hit=272525 read=18184 dirtied=296
                           ->  Hash Join  (cost=49699.01..607115.00 rows=1456213 width=12) (actual time=860.423..23792.725 rows=1456729 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=272525 read=18184 dirtied=296
                                 ->  Seq Scan on orders  (cost=0.00..442530.20 rows=7296266 width=16) (actual time=0.024..6649.650 rows=7284462 loops=1)
                                       Filter: (o_orderdate < '1995-03-13'::date)
                                       Rows Removed by Filter: 7730538
                                       Buffers: shared hit=238376 read=15905 dirtied=296
                                 ->  Hash  (cost=45956.82..45956.82 rows=299375 width=4) (actual time=860.099..860.099 rows=300036 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10549kB
                                       Buffers: shared hit=34149 read=2279
                                       ->  Bitmap Heap Scan on customer  (cost=6936.64..45956.82 rows=299375 width=4) (actual time=161.753..709.240 rows=300036 loops=1)
                                             Recheck Cond: (c_mktsegment = 'AUTOMOBILE'::bpchar)
                                             Buffers: shared hit=34149 read=2279
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6861.79 rows=299375 width=0) (actual time=147.804..147.804 rows=300036 loops=1)
                                                   Index Cond: (c_mktsegment = 'AUTOMOBILE'::bpchar)
                                                   Buffers: shared read=1153
 Total runtime: 82657.973 ms
(35 rows)

COMMIT;
COMMIT