QUERY PLAN
GroupAggregate (cost=480.31..480.35 rows=2 width=44)
Group Key: c.project_id
-> Sort (cost=480.31..480.31 rows=2 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=435.60..480.30 rows=2 width=20)
Hash Cond: (tbl_pre_sales.case_id = c.id)
-> HashAggregate (cost=104.58..128.85 rows=1618 width=20)
Group Key: tbl_pre_sales.case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..88.30 rows=1628 width=24)
Filter: (NOT is_draft)
-> Hash (cost=331.00..331.00 rows=2 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..331.00 rows=2 width=8)
Filter: ((case_type = 1) AND (project_id = ANY ('{4172,4169,4168,4157}'::integer[])))