QUERY PLAN
Sort (cost=108.07..108.08 rows=1 width=191)
Sort Key: s.target_completed_at, s.created_at DESC
InitPlan 1 (returns $0)
-> Aggregate (cost=50.88..50.89 rows=1 width=32)
-> Seq Scan on tbl_tasks s_1 (cost=0.00..50.87 rows=2 width=13)
Filter: ((tree_path IS NOT NULL) AND (head_of = 1001) AND (status = '0'::smallint))
-> Group (cost=57.17..57.18 rows=1 width=191)
Group Key: s.id
-> Sort (cost=57.17..57.17 rows=1 width=191)
Sort Key: s.id
-> Seq Scan on tbl_tasks s (cost=0.00..57.16 rows=1 width=191)
Filter: ((tree_path @> $0) AND (head_of = 1001) AND (status = '0'::smallint) AND (parent_id = 1535))