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 '1997-08-01'
	and o_orderdate < cast(date '1997-08-01' + 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: 1545.056 ms  plan:
Query Text: select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-08-01'
	and o_orderdate < cast(date '1997-08-01' + 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=515839.31..515888.60 rows=5 width=24) (actual time=1503.646..1545.039 rows=5 loops=1)
  Group Key: orders.o_orderpriority
  ->  Gather Merge  (cost=515839.31..515888.50 rows=10 width=24) (actual time=1492.695..1545.023 rows=15 loops=1)
        Workers Planned: 2
        Workers Launched: 2
        ->  Partial GroupAggregate  (cost=514839.28..514887.33 rows=5 width=24) (actual time=1489.585..1531.262 rows=5 loops=3)
              Group Key: orders.o_orderpriority
              ->  Sort  (cost=514839.28..514855.28 rows=6399 width=16) (actual time=1478.842..1507.902 rows=175464 loops=3)
                    Sort Key: orders.o_orderpriority
                    Sort Method: external merge  Disk: 4496kB
                    Worker 0:  Sort Method: external merge  Disk: 4456kB
                    Worker 1:  Sort Method: external merge  Disk: 4488kB
                    ->  Nested Loop Semi Join  (cost=0.56..514434.75 rows=6399 width=16) (actual time=0.062..1411.634 rows=175464 loops=3)
                          ->  Parallel Seq Scan on orders  (cost=0.00..362157.46 rows=236825 width=24) (actual time=0.023..750.415 rows=191427 loops=3)
                                Filter: ((o_orderdate >= '1997-08-01'::date) AND (o_orderdate < '1997-11-01'::date))
                                Rows Removed by Filter: 4813573
                          ->  Index Only Scan using lineitem_l_orderkey_l_suppkey_idx on lineitem  (cost=0.56..4.27 rows=49 width=8) (actual time=0.003..0.003 rows=1 loops=574281)
                                Index Cond: (l_orderkey = orders.o_orderkey)
                                Heap Fetches: 534
 o_orderpriority | order_count 
-----------------+-------------
 1-URGENT        |      105866
 2-HIGH          |      105811
 3-MEDIUM        |      104783
 4-NOT SPECIFIED |      104801
 5-LOW           |      105132
(5 rows)

COMMIT;
COMMIT