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 '1995-09-01'
	and o_orderdate < cast(date '1995-09-01' + 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: 5263.067 ms  plan:
Query Text: select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-09-01'
	and o_orderdate < cast(date '1995-09-01' + 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=512584.58..512632.70 rows=5 width=24) (actual time=5174.925..5263.030 rows=5 loops=1)
  Group Key: orders.o_orderpriority
  ->  Gather Merge  (cost=512584.58..512632.60 rows=10 width=24) (actual time=5138.612..5262.995 rows=15 loops=1)
        Workers Planned: 2
        Workers Launched: 2
        ->  Partial GroupAggregate  (cost=511584.56..511631.42 rows=5 width=24) (actual time=5097.436..5182.937 rows=5 loops=3)
              Group Key: orders.o_orderpriority
              ->  Sort  (cost=511584.56..511600.16 rows=6242 width=16) (actual time=5065.552..5127.511 rows=173141 loops=3)
                    Sort Key: orders.o_orderpriority
                    Sort Method: external merge  Disk: 4392kB
                    Worker 0:  Sort Method: external merge  Disk: 4280kB
                    Worker 1:  Sort Method: external merge  Disk: 4592kB
                    ->  Nested Loop Semi Join  (cost=0.56..511191.07 rows=6242 width=16) (actual time=0.133..4857.691 rows=173141 loops=3)
                          ->  Parallel Seq Scan on orders  (cost=0.00..362157.46 rows=231015 width=24) (actual time=0.047..2331.660 rows=188949 loops=3)
                                Filter: ((o_orderdate >= '1995-09-01'::date) AND (o_orderdate < '1995-12-01'::date))
                                Rows Removed by Filter: 4811051
                          ->  Index Only Scan using lineitem_l_orderkey_l_suppkey_idx on lineitem  (cost=0.56..4.37 rows=49 width=8) (actual time=0.012..0.012 rows=1 loops=566847)
                                Index Cond: (l_orderkey = orders.o_orderkey)
                                Heap Fetches: 560
 o_orderpriority | order_count 
-----------------+-------------
 1-URGENT        |      103954
 2-HIGH          |      104286
 3-MEDIUM        |      104024
 4-NOT SPECIFIED |      103951
 5-LOW           |      103207
(5 rows)

COMMIT;
COMMIT