QUERY PLAN
Sort (cost=305.55..305.56 rows=1 width=248)
Sort Key: s.created_at DESC
InitPlan 1 (returns $0)
-> Aggregate (cost=149.79..149.80 rows=1 width=32)
-> Seq Scan on tbl_tasks s_1 (cost=0.00..149.79 rows=1 width=13)
Filter: ((tree_path IS NOT NULL) AND (head_of = 1001) AND (status = '0'::smallint))
-> Group (cost=155.73..155.74 rows=1 width=248)
Group Key: s.id
-> Sort (cost=155.73..155.73 rows=1 width=248)
Sort Key: s.id
-> Seq Scan on tbl_tasks s (cost=0.00..155.72 rows=1 width=248)
Filter: ((tree_path @> $0) AND (head_of = 1001) AND (status = '0'::smallint) AND (parent_id = 1595))