QUERY PLAN
GroupAggregate (cost=684.35..684.71 rows=18 width=36)
Group Key: c.project_id
-> Sort (cost=684.35..684.39 rows=18 width=36)
Sort Key: c.project_id
-> Hash Right Join (cost=494.52..683.97 rows=18 width=36)
Hash Cond: (tbl_case_assignments.case_id = c.id)
-> HashAggregate (cost=192.88..287.13 rows=7540 width=36)
Group Key: tbl_case_assignments.case_id
-> Seq Scan on tbl_case_assignments (cost=0.00..154.92 rows=7592 width=12)
-> Hash (cost=301.41..301.41 rows=18 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..301.41 rows=18 width=8)
Filter: (project_id = ANY ('{3819,3805,3814,3817,3811,3818,3816}'::integer[]))