QUERY PLAN
GroupAggregate (cost=994.40..995.81 rows=62 width=44)
Group Key: c.project_id
-> Sort (cost=994.40..994.56 rows=64 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=806.86..992.48 rows=64 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=395.52..395.52 rows=64 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..395.52 rows=64 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{4024,4177,263,2504,1791,1111,4136,4139,4017,3754}'::integer[])))