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 = 'FURNITURE'
	and c_custkey = o_custkey
	and l_orderkey = o_orderkey
	and o_orderdate < date '1995-03-04'
	and l_shipdate > date '1995-03-04'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2770082.45..2770082.47 rows=10 width=20) (actual time=78513.845..78513.850 rows=10 loops=1)
   Buffers: shared hit=953575 read=417352 written=5
   ->  Sort  (cost=2770082.45..2778040.35 rows=3183160 width=20) (actual time=78513.841..78513.844 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=953575 read=417352 written=5
         ->  HashAggregate  (cost=2669463.90..2701295.50 rows=3183160 width=20) (actual time=78402.347..78489.998 rows=113532 loops=1)
               Buffers: shared hit=953569 read=417352 written=5
               ->  Hash Join  (cost=629187.56..2621716.50 rows=3183160 width=20) (actual time=26615.417..77926.999 rows=299128 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=953569 read=417352 written=5
                     ->  Seq Scan on lineitem  (cost=0.00..1836999.43 rows=32986112 width=12) (actual time=0.042..27796.487 rows=32640011 loops=1)
                           Filter: (l_shipdate > '1995-03-04'::date)
                           Rows Removed by Filter: 27404983
                           Buffers: shared hit=662371 read=415817 written=5
                     ->  Hash  (cost=610876.77..610876.77 rows=1464863 width=12) (actual time=26613.306..26613.306 rows=1446148 loops=1)
                           Buckets: 262144  Batches: 1  Memory Usage: 62140kB
                           Buffers: shared hit=291198 read=1535
                           ->  Hash Join  (cost=49773.94..610876.77 rows=1464863 width=12) (actual time=733.068..24991.777 rows=1446148 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=291198 read=1535
                                 ->  Seq Scan on orders  (cost=0.00..446056.09 rows=7301681 width=16) (actual time=0.016..6700.970 rows=7228039 loops=1)
                                       Filter: (o_orderdate < '1995-03-04'::date)
                                       Rows Removed by Filter: 7786961
                                       Buffers: shared hit=255998 read=309
                                 ->  Hash  (cost=46012.31..46012.31 rows=300930 width=4) (actual time=732.833..732.833 rows=299496 loops=1)
                                       Buckets: 32768  Batches: 1  Memory Usage: 10530kB
                                       Buffers: shared hit=35200 read=1226
                                       ->  Bitmap Heap Scan on customer  (cost=6972.69..46012.31 rows=300930 width=4) (actual time=107.408..600.056 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Buffers: shared hit=35200 read=1226
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6897.46 rows=300930 width=0) (actual time=95.163..95.163 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1151
 Total runtime: 78561.109 ms
(35 rows)

COMMIT;
COMMIT