QUERY PLAN
GroupAggregate (cost=994.18..995.77 rows=68 width=44)
Group Key: c.client_id
-> Sort (cost=994.18..994.36 rows=74 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=806.28..991.88 rows=74 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=410.51..511.28 rows=6718 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..340.28 rows=7023 width=24)
Filter: (NOT is_draft)
-> Hash (cost=394.85..394.85 rows=74 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..394.85 rows=74 width=8)
Filter: ((case_type = 2) AND (client_id = ANY ('{3424,42,3455,3453,3442,3410,3441,3440,3439,3394}'::integer[])))