QUERY PLAN
GroupAggregate (cost=511.06..511.27 rows=9 width=44)
Group Key: c.client_id
-> Sort (cost=511.06..511.09 rows=9 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=467.74..510.92 rows=9 width=20)
Hash Cond: (tbl_pre_sales.case_id = c.id)
-> HashAggregate (cost=101.48..124.92 rows=1563 width=20)
Group Key: tbl_pre_sales.case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..85.75 rows=1573 width=24)
Filter: (NOT is_draft)
-> Hash (cost=366.15..366.15 rows=9 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..366.15 rows=9 width=8)
Filter: ((case_type = 1) AND (client_id = ANY ('{3334,3327,3311,3304,3301,3296,3286,3278,3009,2845}'::integer[])))