QUERY PLAN
GroupAggregate (cost=688.58..688.74 rows=8 width=36)
Group Key: c.project_id
-> Sort (cost=688.58..688.60 rows=8 width=36)
Sort Key: c.project_id
-> Hash Right Join (cost=486.74..688.46 rows=8 width=36)
Hash Cond: (tbl_case_assignments.case_id = c.id)
-> HashAggregate (cost=205.23..305.58 rows=8028 width=36)
Group Key: tbl_case_assignments.case_id
-> Seq Scan on tbl_case_assignments (cost=0.00..164.82 rows=8082 width=12)
-> Hash (cost=281.41..281.41 rows=8 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..281.41 rows=8 width=8)
Filter: (project_id = ANY ('{3958,3959,1791}'::integer[]))