QUERY PLAN
GroupAggregate (cost=938.63..938.87 rows=11 width=44)
Group Key: c.project_id
-> Sort (cost=938.63..938.65 rows=11 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=752.81..938.43 rows=11 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=342.14..342.14 rows=11 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..342.14 rows=11 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{4167,4166,4161,4164,4155}'::integer[])))