QUERY PLAN
GroupAggregate (cost=847.18..851.18 rows=159 width=44)
Group Key: c.client_id
-> Sort (cost=847.18..847.68 rows=201 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=677.32..839.49 rows=201 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=320.27..320.27 rows=201 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..320.27 rows=201 width=8)
Filter: ((case_type = 2) AND (client_id = ANY ('{1181,497,287,3338,592,582,1207}'::integer[])))