QUERY PLAN
GroupAggregate (cost=964.72..968.86 rows=165 width=44)
Group Key: c.client_id
-> Sort (cost=964.72..965.24 rows=208 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=777.94..956.71 rows=208 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=394.56..491.62 rows=6471 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..326.79 rows=6777 width=24)
Filter: (NOT is_draft)
-> Hash (cost=380.77..380.77 rows=208 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..380.77 rows=208 width=8)
Filter: ((case_type = 2) AND (client_id = ANY ('{518,531,1225,3284,2186,3312,141,304,2146,24}'::integer[])))