QUERY PLAN
GroupAggregate (cost=664.25..837.33 rows=95 width=44)
Group Key: c.client_id
-> Hash Right Join (cost=664.25..835.34 rows=107 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=376.02..468.91 rows=6193 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..311.03 rows=6499 width=24)
Filter: (NOT is_draft)
-> Hash (cost=286.89..286.89 rows=107 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..286.89 rows=107 width=8)
Filter: ((case_type = 2) AND (client_id = 12))