QUERY PLAN
GroupAggregate (cost=908.55..909.19 rows=28 width=44)
Group Key: c.client_id
-> Sort (cost=908.55..908.62 rows=29 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=734.02..907.85 rows=29 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=381.98..476.36 rows=6292 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..316.00 rows=6598 width=24)
Filter: (NOT is_draft)
-> Hash (cost=351.67..351.67 rows=29 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..351.67 rows=29 width=8)
Filter: ((case_type = 2) AND (client_id = ANY ('{2181,112,1186,334,1876,161,1250,473}'::integer[])))