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 = 'HOUSEHOLD'
	and c_custkey = o_custkey
	and l_orderkey = o_orderkey
	and o_orderdate < date '1995-03-15'
	and l_shipdate > date '1995-03-15'
group by
	l_orderkey,
	o_orderdate,
	o_shippriority
order by
	revenue desc,
	o_orderdate
LIMIT 10;
                                                                                             QUERY PLAN                                                                                              
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=2537263.89..2537263.92 rows=10 width=20) (actual time=33794.991..33794.992 rows=10 loops=1)
   Buffers: shared hit=1315486 read=42324 dirtied=1061 written=1910
   ->  Sort  (cost=2537263.89..2545178.63 rows=3165896 width=20) (actual time=33794.988..33794.989 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=1315486 read=42324 dirtied=1061 written=1910
         ->  HashAggregate  (cost=2437191.06..2468850.02 rows=3165896 width=20) (actual time=33725.950..33773.939 rows=113142 loops=1)
               Group Key: lineitem.l_orderkey, orders.o_orderdate, orders.o_shippriority
               Buffers: shared hit=1315480 read=42324 dirtied=1061 written=1910
               ->  Hash Join  (cost=763504.76..2389702.62 rows=3165896 width=20) (actual time=7672.215..33456.052 rows=298489 loops=1)
                     Hash Cond: (lineitem.l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=1315480 read=42324 dirtied=1061 written=1910
                     ->  Bitmap Heap Scan on lineitem  (cost=251484.51..1724408.97 rows=32430517 width=12) (actual time=118.680..20271.975 rows=32365888 loops=1)
                           Recheck Cond: (l_shipdate > '1995-03-15'::date)
                           Rows Removed by Index Recheck: 27679715
                           Heap Blocks: lossy=1067543
                           Buffers: shared hit=1026474 read=41117 dirtied=1061 written=1910
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey_brin_idx  (cost=0.00..243376.88 rows=32430517 width=0) (actual time=117.933..117.933 rows=10676480 loops=1)
                                 Index Cond: (l_shipdate > '1995-03-15'::date)
                                 Buffers: shared hit=48
                     ->  Hash  (cost=493679.76..493679.76 rows=1467239 width=12) (actual time=7543.473..7543.473 rows=1455536 loops=1)
                           Buckets: 2097152  Batches: 1  Memory Usage: 78927kB
                           Buffers: shared hit=289006 read=1207
                           ->  Hash Join  (cost=106466.58..493679.76 rows=1467239 width=12) (actual time=415.989..7044.416 rows=1455536 loops=1)
                                 Hash Cond: (orders.o_custkey = customer.c_custkey)
                                 Buffers: shared hit=289006 read=1207
                                 ->  Bitmap Heap Scan on orders  (cost=56682.15..401815.45 rows=7308664 width=16) (actual time=27.331..4265.993 rows=7296925 loops=1)
                                       Recheck Cond: (o_orderdate < '1995-03-15'::date)
                                       Rows Removed by Index Recheck: 7718075
                                       Heap Blocks: lossy=253775
                                       Buffers: shared hit=253780 read=6
                                       ->  Bitmap Index Scan on orders_o_orderkey_o_orderdate_brin_idx  (cost=0.00..54854.98 rows=7308664 width=0) (actual time=27.169..27.169 rows=2538240 loops=1)
                                             Index Cond: (o_orderdate < '1995-03-15'::date)
                                             Buffers: shared hit=5 read=6
                                 ->  Hash  (cost=46020.31..46020.31 rows=301130 width=4) (actual time=386.230..386.230 rows=299751 loops=1)
                                       Buckets: 524288  Batches: 1  Memory Usage: 14635kB
                                       Buffers: shared hit=35226 read=1201
                                       ->  Bitmap Heap Scan on customer  (cost=6978.19..46020.31 rows=301130 width=4) (actual time=75.105..308.145 rows=299751 loops=1)
                                             Recheck Cond: (c_mktsegment = 'HOUSEHOLD'::bpchar)
                                             Heap Blocks: exact=35275
                                             Buffers: shared hit=35226 read=1201
                                             ->  Bitmap Index Scan on customer_c_mktsegment_c_custkey_idx  (cost=0.00..6902.90 rows=301130 width=0) (actual time=66.361..66.361 rows=299751 loops=1)
                                                   Index Cond: (c_mktsegment = 'HOUSEHOLD'::bpchar)
                                                   Buffers: shared hit=2 read=1150
 Planning time: 2.937 ms
 Execution time: 33816.296 ms
(46 rows)

COMMIT;
COMMIT