QUERY PLAN
Sort (cost=108.14..108.15 rows=1 width=190)
Sort Key: s.target_completed_at, s.created_at DESC
InitPlan 1 (returns $0)
-> Aggregate (cost=50.90..50.91 rows=1 width=32)
-> Seq Scan on tbl_tasks s_1 (cost=0.00..50.90 rows=1 width=13)
Filter: ((tree_path IS NOT NULL) AND (head_of = 1001) AND (status = '0'::smallint))
-> Group (cost=57.21..57.22 rows=1 width=190)
Group Key: s.id
-> Sort (cost=57.21..57.22 rows=1 width=190)
Sort Key: s.id
-> Seq Scan on tbl_tasks s (cost=0.00..57.20 rows=1 width=190)
Filter: ((tree_path @> $0) AND (head_of = 1001) AND (status = '0'::smallint) AND (parent_id = 1667))