QUERY PLAN
HashAggregate (cost=91.96..92.20 rows=24 width=12)
Group Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..91.75 rows=41 width=4)
Filter: (parent_id = ANY ('{1824,1772,1754,1751,1746,1735,1697,1696,1687,1684,1683,1671,1670,1647,1641,1426,1357,1350,1349,1348,1347,1252,1249,1248,1246,1245,1242,1240,1239,1238}'::integer[]))