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 '1995-03-08'
	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=2670128.06..2670128.09 rows=10 width=20) (actual time=32026.515..32026.518 rows=10 loops=1)
   Buffers: shared hit=926962 read=430790 dirtied=253
   ->  Sort  (cost=2670128.06..2677985.86 rows=3143119 width=20) (actual time=32026.511..32026.512 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=926962 read=430790 dirtied=253
         ->  HashAggregate  (cost=2570775.20..2602206.39 rows=3143119 width=20) (actual time=31945.839..32006.014 rows=113620 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=926956 read=430790 dirtied=253
               ->  Hash Join  (cost=551294.52..2523628.41 rows=3143119 width=20) (actual time=8250.680..31705.940 rows=299171 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=926956 read=430790 dirtied=253
                     ->  Seq Scan on lineitem  (cost=0.00..1818872.61 rows=32541358 width=12) (actual time=0.032..17886.745 rows=32541180 loops=1)
                           Filter: (l_shipdate > '1995-03-08'::date)
                           Rows Removed by Filter: 27504423
                           Buffers: shared hit=727648 read=339898
                     ->  Hash  (cost=533148.01..533148.01 rows=1451721 width=12) (actual time=8242.852..8242.852 rows=1451233 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 78742kB
                           Buffers: shared hit=199308 read=90892 dirtied=253
                           ->  Hash Join  (cost=49689.56..533148.01 rows=1451721 width=12) (actual time=754.836..7758.786 rows=1451233 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=199308 read=90892 dirtied=253
                                 ->  Seq Scan on orders  (cost=0.00..441649.60 rows=7277771 width=16) (actual time=0.026..4624.224 rows=7253269 loops=1)
                                       Filter: (o_orderdate < '1995-03-08'::date)
                                       Rows Removed by Filter: 7761731
                                       Buffers: shared hit=199306 read=54469 dirtied=253
                                 ->  Hash  (cost=45949.43..45949.43 rows=299210 width=4) (actual time=752.437..752.437 rows=299496 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14626kB
                                       Buffers: shared hit=2 read=36423
                                       ->  Bitmap Heap Scan on customer  (cost=6931.30..45949.43 rows=299210 width=4) (actual time=71.552..660.862 rows=299496 loops=1)
                                             Recheck Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                             Heap Blocks: exact=35275
                                             Buffers: shared hit=2 read=36423
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6856.50 rows=299210 width=0) (actual time=62.640..62.640 rows=299496 loops=1)
                                                   Index Cond: (c_mktsegment = 'FURNITURE'::bpchar)
                                                   Buffers: shared read=1150
 Planning time: 3.838 ms
 Execution time: 32046.855 ms
(38 rows)

COMMIT;
COMMIT