QUERY PLAN
GroupAggregate (cost=752.22..752.50 rows=14 width=36)
Group Key: c.project_id
-> Sort (cost=752.22..752.25 rows=14 width=36)
Sort Key: c.project_id
-> Hash Right Join (cost=538.08..751.95 rows=14 width=36)
Hash Cond: (tbl_case_assignments.case_id = c.id)
-> HashAggregate (cost=217.55..323.95 rows=8512 width=36)
Group Key: tbl_case_assignments.case_id
-> Seq Scan on tbl_case_assignments (cost=0.00..174.70 rows=8570 width=12)
-> Hash (cost=320.35..320.35 rows=14 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..320.35 rows=14 width=8)
Filter: (project_id = ANY ('{3109,3022,2755,2745,1366}'::integer[]))