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 '1993-02-01'
	and o_orderdate < cast(date '1993-02-01' + 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: 4131.634 ms  plan:
Query Text: select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-02-01'
	and o_orderdate < cast(date '1993-02-01' + 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=521173.88..521223.76 rows=5 width=24) (actual time=4051.364..4131.593 rows=5 loops=1)
  Group Key: orders.o_orderpriority
  ->  Gather Merge  (cost=521173.88..521223.66 rows=10 width=24) (actual time=3996.437..4131.528 rows=15 loops=1)
        Workers Planned: 2
        Workers Launched: 2
        ->  Partial GroupAggregate  (cost=520173.86..520222.48 rows=5 width=24) (actual time=3965.115..4059.075 rows=5 loops=3)
              Group Key: orders.o_orderpriority
              ->  Sort  (cost=520173.86..520190.05 rows=6476 width=16) (actual time=3942.225..4006.427 rows=169791 loops=3)
                    Sort Key: orders.o_orderpriority
                    Sort Method: external merge  Disk: 4376kB
                    Worker 0:  Sort Method: external merge  Disk: 4496kB
                    Worker 1:  Sort Method: external merge  Disk: 4136kB
                    ->  Nested Loop Semi Join  (cost=0.56..519763.90 rows=6476 width=16) (actual time=0.147..3761.983 rows=169791 loops=3)
                          ->  Parallel Seq Scan on orders  (cost=0.00..363241.27 rows=240400 width=24) (actual time=0.056..2087.340 rows=185078 loops=3)
                                Filter: ((o_orderdate >= '1993-02-01'::date) AND (o_orderdate < '1993-05-01'::date))
                                Rows Removed by Filter: 4814922
                          ->  Index Only Scan using lineitem_l_orderkey_l_suppkey_idx on lineitem  (cost=0.56..4.65 rows=49 width=8) (actual time=0.008..0.008 rows=1 loops=555233)
                                Index Cond: (l_orderkey = orders.o_orderkey)
                                Heap Fetches: 2195
 o_orderpriority | order_count 
-----------------+-------------
 1-URGENT        |      102145
 2-HIGH          |      101788
 3-MEDIUM        |      101772
 4-NOT SPECIFIED |      102044
 5-LOW           |      101624
(5 rows)

COMMIT;
COMMIT