QUERY PLAN
GroupAggregate (cost=978.47..981.83 rows=137 width=44)
Group Key: c.client_id
-> Sort (cost=978.47..978.88 rows=165 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=786.77..972.39 rows=165 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=165 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..374.17 rows=165 width=8)
Filter: ((case_type = 2) AND (client_id = ANY ('{2616,2538,3417,2032,14,2198,28,481}'::integer[])))