QUERY PLAN
GroupAggregate (cost=872.56..875.63 rows=126 width=44)
Group Key: c.client_id
-> Sort (cost=872.56..872.93 rows=150 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=704.96..867.13 rows=150 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=150 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..348.55 rows=150 width=8)
Filter: ((case_type = 2) AND (client_id = ANY ('{2007,2505,427,498,518,2821,3331,31,2153,2546}'::integer[])))