QUERY PLAN
GroupAggregate (cost=868.18..869.65 rows=63 width=44)
Group Key: c.client_id
-> Sort (cost=868.18..868.35 rows=68 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=703.94..866.11 rows=68 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=354.54..442.59 rows=5870 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..292.78 rows=6176 width=24)
Filter: (NOT is_draft)
-> Hash (cost=348.55..348.55 rows=68 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..348.55 rows=68 width=8)
Filter: ((case_type = 2) AND (client_id = ANY ('{399,1661,2120,2162,2169,1465,2147,1283,2095,39}'::integer[])))