#	exclusive	inclusive	rows x	rows	loops	node
1.	8.058	23.929	↑ 1.0	4664	1	→ HashAggregate (cost=1320.07..1366.71 rows=4664 width=32) (actual time=23.394..23.929 rows=4664 loops=1)
2.	8.055	15.871	↓ 1.0	18370	1	→ Hash Right Join (cost=264.94..1091.55 rows=18282 width=32) (actual time=5.449..15.871 rows=18370 loops=1) Hash Cond: (pol.order_id = po.id)
3.	2.388	2.388	↑ 1.0	18279	1	→ Seq Scan on purchase_order_line pol (cost=0.00..483.82 rows=18282 width=12) (actual time=0.005..2.388 rows=18279 loops=1)
4.	1.541	5.428	↑ 1.0	4664	1	→ Hash (cost=206.64..206.64 rows=4664 width=24) (actual time=5.428..5.428 rows=4664 loops=1) Buckets: 1024 Batches: 1 Memory Usage: 292kB
5.	3.887	3.887	↑ 1.0	4664	1	→ Seq Scan on purchase_order po (cost=0.00..206.64 rows=4664 width=24) (actual time=0.021..3.887 rows=4664 loops=1)

"HashAggregate  (cost=1320.07..1366.71 rows=4664 width=32) (actual time=23.394..23.929 rows=4664 loops=1)"
"  ->  Hash Right Join  (cost=264.94..1091.55 rows=18282 width=32) (actual time=5.449..15.871 rows=18370 loops=1)"
"        Hash Cond: (pol.order_id = po.id)"
"        ->  Seq Scan on purchase_order_line pol  (cost=0.00..483.82 rows=18282 width=12) (actual time=0.005..2.388 rows=18279 loops=1)"
"        ->  Hash  (cost=206.64..206.64 rows=4664 width=24) (actual time=5.428..5.428 rows=4664 loops=1)"
"              Buckets: 1024  Batches: 1  Memory Usage: 292kB"
"              ->  Seq Scan on purchase_order po  (cost=0.00..206.64 rows=4664 width=24) (actual time=0.021..3.887 rows=4664 loops=1)"
"Total runtime: 24.184 ms"

Per node type stats

node type	count	sum of times	% of query
Hash	1	1.541 ms	6.4 %
Hash Right Join	1	8.055 ms	33.7 %
HashAggregate	1	8.058 ms	33.7 %
Seq Scan	2	6.275 ms	26.2 %

Per table stats

Table name	Scan count	Total time	% of query
scan type	count	sum of times	% of table
purchase_order	1	3.887 ms	16.2 %
Seq Scan	1	3.887 ms	100.0 %
purchase_order_line	1	2.388 ms	10.0 %
Seq Scan	1	2.388 ms	100.0 %

explain.depesz.com

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Per node type stats

Per table stats