| GroupAggregate (cost=147.01..147.04 rows=2 width=12) |
| Group Key: parent_id |
| -> Sort (cost=147.01..147.01 rows=2 width=4) |
| Sort Key: parent_id |
| -> Seq Scan on tbl_tasks (cost=0.00..147.00 rows=2 width=4) |
| Filter: (parent_id = ANY ('{1621,1620}'::integer[])) |