QUERY PLAN
Sort (cost=300.17..300.18 rows=1 width=236)
Sort Key: s.created_at DESC
InitPlan 1 (returns $0)
-> Aggregate (cost=147.14..147.15 rows=1 width=32)
-> Seq Scan on tbl_tasks s_1 (cost=0.00..147.00 rows=54 width=13)
Filter: ((tree_path IS NOT NULL) AND (head_of = 1001))
-> Group (cost=153.01..153.02 rows=1 width=236)
Group Key: s.id
-> Sort (cost=153.01..153.01 rows=1 width=236)
Sort Key: s.id
-> Seq Scan on tbl_tasks s (cost=0.00..153.00 rows=1 width=236)
Filter: ((tree_path @> $0) AND (head_of = 1001) AND (parent_id = 1593))