QUERY PLAN
GroupAggregate (cost=970.93..971.33 rows=18 width=44)
Group Key: c.project_id
-> Sort (cost=970.93..970.97 rows=18 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=784.93..970.55 rows=18 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=410.53..511.32 rows=6719 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..340.29 rows=7024 width=24)
Filter: (NOT is_draft)
-> Hash (cost=374.17..374.17 rows=18 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..374.17 rows=18 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{4097,4114,4124,4127,4120,4111,4052,3797}'::integer[])))