QUERY PLAN
GroupAggregate (cost=788.81..790.95 rows=105 width=36)
Group Key: c.project_id
-> Sort (cost=788.81..789.08 rows=110 width=36)
Sort Key: c.project_id
-> Hash Right Join (cost=571.20..785.08 rows=110 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=352.28..352.28 rows=110 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..352.28 rows=110 width=8)
Filter: (project_id = ANY ('{4167,4166,4161,4164,4155,4158,1018,1111}'::integer[]))