QUERY PLAN
GroupAggregate (cost=814.28..816.76 rows=103 width=44)
Group Key: c.client_id
-> Sort (cost=814.28..814.58 rows=119 width=20)
Sort Key: c.client_id
-> Hash Right Join (cost=648.01..810.18 rows=119 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=291.99..291.99 rows=119 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..291.99 rows=119 width=8)
Filter: ((case_type = 2) AND (client_id = ANY ('{90,592,582,1207}'::integer[])))