QUERY PLAN
GroupAggregate (cost=371.56..413.30 rows=1 width=44)
Group Key: c.client_id
-> Hash Right Join (cost=371.56..413.28 rows=1 width=20)
Hash Cond: (tbl_pre_sales.case_id = c.id)
-> HashAggregate (cost=98.42..121.07 rows=1510 width=20)
Group Key: tbl_pre_sales.case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..83.22 rows=1520 width=24)
Filter: (NOT is_draft)
-> Hash (cost=273.13..273.13 rows=1 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..273.13 rows=1 width=8)
Filter: ((case_type = 1) AND (client_id = 3281))