load 'auto_explain';
LOAD
set auto_explain.log_min_duration to 0;
SET
set auto_explain.log_analyze to on;
SET
set auto_explain.log_wal to on;
SET
set auto_explain.log_timing to on;
SET
set auto_explain.log_level to notice;
SET
BEGIN;
BEGIN
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-05-01'
	and o_orderdate < cast(date '1995-05-01' + 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;
NOTICE:  duration: 1301.970 ms  plan:
Query Text: select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-05-01'
	and o_orderdate < cast(date '1995-05-01' + 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;
Finalize GroupAggregate  (cost=516265.06..516313.41 rows=5 width=24) (actual time=1261.188..1301.955 rows=5 loops=1)
  Group Key: orders.o_orderpriority
  ->  Gather Merge  (cost=516265.06..516313.31 rows=10 width=24) (actual time=1250.367..1301.941 rows=15 loops=1)
        Workers Planned: 2
        Workers Launched: 2
        ->  Partial GroupAggregate  (cost=515265.04..515312.14 rows=5 width=24) (actual time=1247.476..1288.835 rows=5 loops=3)
              Group Key: orders.o_orderpriority
              ->  Sort  (cost=515265.04..515280.72 rows=6273 width=16) (actual time=1236.834..1265.497 rows=175364 loops=3)
                    Sort Key: orders.o_orderpriority
                    Sort Method: external merge  Disk: 4512kB
                    Worker 0:  Sort Method: external merge  Disk: 4448kB
                    Worker 1:  Sort Method: external merge  Disk: 4472kB
                    ->  Nested Loop Semi Join  (cost=0.56..514869.37 rows=6273 width=16) (actual time=0.057..1178.269 rows=175364 loops=3)
                          ->  Parallel Seq Scan on orders  (cost=0.00..363241.27 rows=232867 width=24) (actual time=0.018..654.815 rows=191211 loops=3)
                                Filter: ((o_orderdate >= '1995-05-01'::date) AND (o_orderdate < '1995-08-01'::date))
                                Rows Removed by Filter: 4808789
                          ->  Index Only Scan using lineitem_l_orderkey_l_suppkey_idx on lineitem  (cost=0.56..4.66 rows=49 width=8) (actual time=0.002..0.002 rows=1 loops=573632)
                                Index Cond: (l_orderkey = orders.o_orderkey)
                                Heap Fetches: 2220
 o_orderpriority | order_count 
-----------------+-------------
 1-URGENT        |      105661
 2-HIGH          |      104819
 3-MEDIUM        |      105542
 4-NOT SPECIFIED |      104835
 5-LOW           |      105236
(5 rows)

COMMIT;
COMMIT