QUERY PLAN
HashAggregate (cost=482.84..485.97 rows=313 width=12)
Group Key: client_id
-> Seq Scan on tbl_cases (cost=0.00..479.99 rows=569 width=8)
Filter: (client_id = ANY ('{3354,399,2616,2538,146,1661,982,2166,1301,3330,2182,3411,304,402,3367,2242,3400,3342,3381,2699}'::integer[]))