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 '1995-03-30'
	and l_shipdate > date '1995-03-30'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2527680.02..2527680.05 rows=10 width=20) (actual time=43770.600..43770.603 rows=10 loops=1)
   Buffers: shared hit=450836 read=905651
   ->  Sort  (cost=2527680.02..2535582.27 rows=3160900 width=20) (actual time=43770.596..43770.597 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=450836 read=905651
         ->  HashAggregate  (cost=2427765.11..2459374.11 rows=3160900 width=20) (actual time=43713.028..43749.701 rows=113511 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=450830 read=905651
               ->  Hash Join  (cost=762248.29..2380351.61 rows=3160900 width=20) (actual time=7774.790..43411.407 rows=299738 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=450830 read=905651
                     ->  Bitmap Heap Scan on lineitem  (cost=248158.17..1714647.57 rows=32001312 width=12) (actual time=131.633..30229.236 rows=31990857 loops=1)
                           Recheck Cond: (l_shipdate > '1995-03-30'::date)
                           Rows Removed by Index Recheck: 28054812
                           Heap Blocks: lossy=1066473
                           Buffers: shared hit=162031 read=904490
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey_brin_idx  (cost=0.00..240157.84 rows=32001312 width=0) (actual time=130.879..130.879 rows=10664960 loops=1)
                                 Index Cond: (l_shipdate > '1995-03-30'::date)
                                 Buffers: shared hit=12 read=36
                     ->  Hash  (cost=495551.49..495551.49 rows=1483091 width=12) (actual time=7636.431..7636.431 rows=1477836 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 79885kB
                           Buffers: shared hit=288799 read=1161
                           ->  Hash Join  (cost=107095.80..495551.49 rows=1483091 width=12) (actual time=389.983..7157.059 rows=1477836 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=288799 read=1161
                                 ->  Bitmap Heap Scan on orders  (cost=57319.79..403228.54 rows=7390940 width=16) (actual time=27.560..4590.740 rows=7390216 loops=1)
                                       Recheck Cond: (o_orderdate < '1995-03-30'::date)
                                       Rows Removed by Index Recheck: 7624784
                                       Heap Blocks: lossy=253522
                                       Buffers: shared hit=253524 read=9
                                       ->  Bitmap Index Scan on orders_o_orderkey_o_orderdate_brin_idx  (cost=0.00..55472.05 rows=7390940 width=0) (actual time=27.389..27.389 rows=2535680 loops=1)
                                             Index Cond: (o_orderdate < '1995-03-30'::date)
                                             Buffers: shared hit=2 read=9
                                 ->  Hash  (cost=46013.58..46013.58 rows=300995 width=4) (actual time=360.403..360.403 rows=300036 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14645kB
                                       Buffers: shared hit=35275 read=1152
                                       ->  Bitmap Heap Scan on customer  (cost=6973.14..46013.58 rows=300995 width=4) (actual time=71.648..289.007 rows=300036 loops=1)
                                             Recheck Cond: (c_mktsegment = 'AUTOMOBILE'::bpchar)
                                             Heap Blocks: exact=35275
                                             Buffers: shared hit=35275 read=1152
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6897.89 rows=300995 width=0) (actual time=63.761..63.761 rows=300036 loops=1)
                                                   Index Cond: (c_mktsegment = 'AUTOMOBILE'::bpchar)
                                                   Buffers: shared read=1152
 Planning time: 5.212 ms
 Execution time: 43783.768 ms
(46 rows)

COMMIT;
COMMIT