QUERY PLAN
GroupAggregate (cost=857.62..857.87 rows=11 width=44)
Group Key: c.client_id
-> Sort (cost=857.62..857.65 rows=11 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=683.61..857.43 rows=11 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=301.49..301.49 rows=11 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..301.49 rows=11 width=8)
Filter: ((case_type = 2) AND (client_id = ANY ('{3331,3290,2153}'::integer[])))