QUERY PLAN
GroupAggregate (cost=807.58..808.12 rows=27 width=36)
Group Key: c.project_id
-> Sort (cost=807.58..807.65 rows=27 width=36)
Sort Key: c.project_id
-> Hash Right Join (cost=592.44..806.94 rows=27 width=36)
Hash Cond: (tbl_case_assignments.case_id = c.id)
-> HashAggregate (cost=217.93..324.64 rows=8537 width=36)
Group Key: tbl_case_assignments.case_id
-> Seq Scan on tbl_case_assignments (cost=0.00..174.95 rows=8595 width=12)
-> Hash (cost=374.17..374.17 rows=27 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..374.17 rows=27 width=8)
Filter: (project_id = ANY ('{61,183,95,166,291,290,140,330,31,79}'::integer[]))