QUERY PLAN
GroupAggregate (cost=512.50..512.61 rows=5 width=44)
Group Key: c.project_id
-> Sort (cost=512.50..512.51 rows=5 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=469.18..512.44 rows=5 width=20)
Hash Cond: (tbl_pre_sales.case_id = c.id)
-> HashAggregate (cost=101.54..125.03 rows=1566 width=20)
Group Key: tbl_pre_sales.case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..85.78 rows=1576 width=24)
Filter: (NOT is_draft)
-> Hash (cost=367.58..367.58 rows=5 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..367.58 rows=5 width=8)
Filter: ((case_type = 1) AND (project_id = ANY ('{3837,3895,3820,3867,3933,3932,3936,3908,3907,3818}'::integer[])))