QUERY PLAN
GroupAggregate (cost=496.76..496.85 rows=4 width=44)
Group Key: c.project_id
-> Sort (cost=496.76..496.77 rows=4 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=453.34..496.72 rows=4 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=351.67..351.67 rows=4 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..351.67 rows=4 width=8)
Filter: ((case_type = 1) AND (project_id = ANY ('{3959,3796,3837,3854,3878,3880,3955,3954}'::integer[])))