#	exclusive	inclusive	rows x	rows	loops	node
1.	0.167	0.167	↑ 260.5	4	1	→ CTE Scan on base_and_ancestors namespaces (cost=19,637.59..19,658.43 rows=1,042 width=12) (actual time=0.082..0.167 rows=4 loops=1)
2.						CTE base_and_ancestors
3.	0.028	0.158	↑ 260.5	4	1	→ Recursive Union (cost=638.21..19,637.59 rows=1,042 width=322) (actual time=0.081..0.158 rows=4 loops=1)
4.	0.002	0.086	↑ 52.0	1	1	→ Nested Loop (cost=638.21..1,582.75 rows=52 width=322) (actual time=0.068..0.086 rows=1 loops=1)
5.	0.055	0.055	↑ 271.0	1	1	→ CTE Scan on base_and_descendants epics_2 (cost=637.78..643.20 rows=271 width=4) (actual time=0.041..0.055 rows=1 loops=1)
6.						CTE base_and_descendants
7.	0.013	0.054	↑ 271.0	1	1	→ Recursive Union (cost=0.29..637.78 rows=271 width=779) (actual time=0.040..0.054 rows=1 loops=1)
8.	0.028	0.028	↑ 1.0	1	1	→ Index Scan using epics_pkey on epics (cost=0.29..3.30 rows=1 width=779) (actual time=0.028..0.028 rows=1 loops=1) Index Cond: (id = 15,413)
9.	0.001	0.013	↓ 0.0	0	1	→ Nested Loop (cost=0.29..62.91 rows=27 width=779) (actual time=0.013..0.013 rows=0 loops=1)
10.	0.001	0.001	↑ 10.0	1	1	→ WorkTable Scan on base_and_descendants (cost=0.00..0.20 rows=10 width=4) (actual time=0.001..0.001 rows=1 loops=1)
11.	0.011	0.011	↓ 0.0	0	1	→ Index Scan using index_epics_on_parent_id on epics epics_1 (cost=0.29..6.24 rows=3 width=779) (actual time=0.011..0.011 rows=0 loops=1) Index Cond: (parent_id = base_and_descendants.id)
12.	0.029	0.029	↑ 1.0	1	1	→ Index Scan using namespaces_pkey on namespaces namespaces_1 (cost=0.43..3.45 rows=1 width=322) (actual time=0.025..0.029 rows=1 loops=1) Index Cond: (id = epics_2.group_id) Filter: ((type)::text = 'Group'::text)
13.	0.004	0.044	↑ 99.0	1	4	→ Nested Loop (cost=0.43..1,803.40 rows=99 width=322) (actual time=0.011..0.011 rows=1 loops=4)
14.	0.000	0.000	↑ 520.0	1	4	→ WorkTable Scan on base_and_ancestors (cost=0.00..10.40 rows=520 width=4) (actual time=0.000..0.000 rows=1 loops=4)
15.	0.040	0.040	↑ 1.0	1	4	→ Index Scan using namespaces_pkey on namespaces namespaces_2 (cost=0.43..3.44 rows=1 width=322) (actual time=0.010..0.010 rows=1 loops=4) Index Cond: (id = base_and_ancestors.parent_id) Filter: ((type)::text = 'Group'::text)

Planning time	:	1.385 ms
Execution time	:	0.535 ms

 CTE Scan on base_and_ancestors namespaces  (cost=19637.59..19658.43 rows=1042 width=12) (actual time=0.082..0.167 rows=4 loops=1)
   CTE base_and_ancestors
     ->  Recursive Union  (cost=638.21..19637.59 rows=1042 width=322) (actual time=0.081..0.158 rows=4 loops=1)
           ->  Nested Loop  (cost=638.21..1582.75 rows=52 width=322) (actual time=0.068..0.086 rows=1 loops=1)
                 ->  CTE Scan on base_and_descendants epics_2  (cost=637.78..643.20 rows=271 width=4) (actual time=0.041..0.055 rows=1 loops=1)
                       CTE base_and_descendants
                         ->  Recursive Union  (cost=0.29..637.78 rows=271 width=779) (actual time=0.040..0.054 rows=1 loops=1)
                               ->  Index Scan using epics_pkey on epics  (cost=0.29..3.30 rows=1 width=779) (actual time=0.028..0.028 rows=1 loops=1)
                                     Index Cond: (id = 15413)
                               ->  Nested Loop  (cost=0.29..62.91 rows=27 width=779) (actual time=0.013..0.013 rows=0 loops=1)
                                     ->  WorkTable Scan on base_and_descendants  (cost=0.00..0.20 rows=10 width=4) (actual time=0.001..0.001 rows=1 loops=1)
                                     ->  Index Scan using index_epics_on_parent_id on epics epics_1  (cost=0.29..6.24 rows=3 width=779) (actual time=0.011..0.011 rows=0 loops=1)
                                           Index Cond: (parent_id = base_and_descendants.id)
                 ->  Index Scan using namespaces_pkey on namespaces namespaces_1  (cost=0.43..3.45 rows=1 width=322) (actual time=0.025..0.029 rows=1 loops=1)
                       Index Cond: (id = epics_2.group_id)
                       Filter: ((type)::text = 'Group'::text)
           ->  Nested Loop  (cost=0.43..1803.40 rows=99 width=322) (actual time=0.011..0.011 rows=1 loops=4)
                 ->  WorkTable Scan on base_and_ancestors  (cost=0.00..10.40 rows=520 width=4) (actual time=0.000..0.000 rows=1 loops=4)
                 ->  Index Scan using namespaces_pkey on namespaces namespaces_2  (cost=0.43..3.44 rows=1 width=322) (actual time=0.010..0.010 rows=1 loops=4)
                       Index Cond: (id = base_and_ancestors.parent_id)
                       Filter: ((type)::text = 'Group'::text)
 Planning time: 1.385 ms
 Execution time: 0.535 ms
(23 rows)

Per node type stats

node type	count	sum of times	% of query
CTE Scan	2	0.222 ms	132.9 %
Index Scan	4	0.108 ms	64.7 %
Nested Loop	3	0.007 ms	4.2 %
Recursive Union	2	0.041 ms	24.6 %
WorkTable Scan	2	0.001 ms	0.6 %

Per table stats

Table name	Scan count	Total time	% of query
scan type	count	sum of times	% of table
epics	2	0.039 ms	23.4 %
Index Scan	2	0.039 ms	100.0 %
namespaces	2	0.069 ms	41.3 %
Index Scan	2	0.069 ms	100.0 %

explain.depesz.com

PostgreSQL's explain analyze made readable

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Per node type stats

Per table stats