BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-03-01'
	and o_orderdate < cast(date '1993-03-01' + interval '3 month' as date)
	and exists (
		select
			*
		from
			lineitem
		where
			l_orderkey = o_orderkey
			and l_commitdate < l_receiptdate
	)
group by
	o_orderpriority
order by
	o_orderpriority;
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=1295565.92..1295565.93 rows=1 width=16) (actual time=95443.081..95443.082 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1098352 read=415971 written=2953
   ->  HashAggregate  (cost=1295565.90..1295565.91 rows=1 width=16) (actual time=95442.944..95442.944 rows=5 loops=1)
         Buffers: shared hit=1098347 read=415971 written=2953
         ->  Hash Join  (cost=1025041.17..1294777.34 rows=157713 width=16) (actual time=84129.538..95150.904 rows=526768 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1098347 read=415971 written=2953
               ->  Bitmap Heap Scan on orders  (cost=12695.59..276779.30 rows=585914 width=20) (actual time=588.023..2581.772 rows=574042 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-03-01'::date) AND (o_orderdate < '1993-06-01'::date))
                     Buffers: shared hit=228424 read=3058
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12549.12 rows=585914 width=0) (actual time=440.408..440.408 rows=577965 loops=1)
                           Index Cond: ((o_orderdate >= '1993-03-01'::date) AND (o_orderdate < '1993-06-01'::date))
                           Buffers: shared read=1648
               ->  Hash  (cost=995387.56..995387.56 rows=1356641 width=4) (actual time=83539.539..83539.539 rows=13767175 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484003kB
                     Buffers: shared hit=869923 read=412913 written=2953
                     ->  HashAggregate  (cost=981821.15..995387.56 rows=1356641 width=4) (actual time=68188.770..77462.563 rows=13767175 loops=1)
                           Buffers: shared hit=869923 read=412913 written=2953
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..931434.07 rows=20154834 width=4) (actual time=0.174..30575.952 rows=37965693 loops=1)
                                 Buffers: shared hit=869923 read=412913 written=2953
 Total runtime: 95723.141 ms
(23 rows)

COMMIT;
COMMIT