QUERY PLAN
GroupAggregate (cost=432.34..432.52 rows=8 width=44)
Group Key: c.client_id
-> Sort (cost=432.34..432.36 rows=8 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=390.51..432.22 rows=8 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=291.99..291.99 rows=8 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..291.99 rows=8 width=8)
Filter: ((case_type = 1) AND (client_id = ANY ('{2806,46,402,3312}'::integer[])))