QUERY PLAN
GroupAggregate (cost=892.12..893.09 rows=48 width=36)
Group Key: c.project_id
-> Sort (cost=892.12..892.24 rows=49 width=36)
Sort Key: c.project_id
-> Hash Right Join (cost=676.87..890.74 rows=49 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=458.70..458.70 rows=49 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..458.70 rows=49 width=8)
Filter: (project_id = ANY ('{4173,4172,4170,4169,4167,4166,4164,4161,4157,4155,4142,4127,4098,4096,4079,4078,3950,3751}'::integer[]))