QUERY PLAN
HashAggregate (cost=95.08..95.30 rows=22 width=12)
Group Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..94.89 rows=39 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1338,1347,1348,1349,1350,1353,1356,1357,1358,1359,1586,1596,1641,1647,1652,1683,1684,1686,1687,1696,1697,1723,1734,1735,1745,1746,1751,1754,1768}'::integer[])))