QUERY PLAN
Aggregate (cost=296.72..296.73 rows=1 width=8)
-> Group (cost=296.70..296.71 rows=1 width=224)
Group Key: s.id
InitPlan 1 (returns $0)
-> Aggregate (cost=146.89..146.90 rows=1 width=32)
-> Seq Scan on tbl_tasks s_1 (cost=0.00..146.82 rows=27 width=13)
Filter: ((tree_path IS NOT NULL) AND (status = 0))
-> Sort (cost=149.80..149.80 rows=1 width=4)
Sort Key: s.id
-> Seq Scan on tbl_tasks s (cost=0.00..149.79 rows=1 width=4)
Filter: ((parent_id IS NULL) AND (tree_path @> $0) AND (status = 0))