QUERY PLAN
Limit (cost=293.69..293.69 rows=1 width=248)
InitPlan 1 (returns $0)
-> Aggregate (cost=146.83..146.84 rows=1 width=32)
-> Seq Scan on tbl_tasks s_1 (cost=0.00..143.86 rows=1186 width=13)
Filter: (tree_path IS NOT NULL)
-> Sort (cost=146.85..146.86 rows=1 width=248)
Sort Key: s.created_at DESC
-> Group (cost=146.83..146.84 rows=1 width=248)
Group Key: s.id
-> Sort (cost=146.83..146.84 rows=1 width=248)
Sort Key: s.id
-> Seq Scan on tbl_tasks s (cost=0.00..146.82 rows=1 width=248)
Filter: ((parent_id IS NULL) AND (tree_path @> $0))