QUERY PLAN
GroupAggregate (cost=446.54..446.61 rows=3 width=44)
Group Key: c.client_id
-> Sort (cost=446.54..446.55 rows=3 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=403.15..446.52 rows=3 width=20)
Hash Cond: (tbl_pre_sales.case_id = c.id)
-> HashAggregate (cost=101.62..125.17 rows=1570 width=20)
Group Key: tbl_pre_sales.case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..85.82 rows=1580 width=24)
Filter: (NOT is_draft)
-> Hash (cost=301.49..301.49 rows=3 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..301.49 rows=3 width=8)
Filter: ((case_type = 1) AND (client_id = ANY ('{3331,3290,2153}'::integer[])))