ALTER QUOTA

ALTER QUOTA [IF EXISTS] name [ON CLUSTER cluster_name]
    [RENAME TO new_name]
    [KEYED BY {user_name | ip_address | forwarded_ip_address | client_key | client_key,user_name | client_key,ip_address | normalized_query_hash} | NOT KEYED]
    [IPV4_PREFIX_BITS number]
    [IPV6_PREFIX_BITS number]
    [FOR [RANDOMIZED] INTERVAL number {second | minute | hour | day | week | month | quarter | year}
        {MAX { {queries | query_selects | query_inserts | errors | result_rows | result_bytes | read_rows | read_bytes | execution_time | queries_per_normalized_hash} = number } [,...] |
        NO LIMITS | TRACKING ONLY} [,...]]
    [TO {role [,...] | ALL | ALL EXCEPT role [,...]}]

ALTER QUOTA IF EXISTS qA FOR INTERVAL 15 month MAX queries = 123 TO CURRENT_USER;

ALTER QUOTA IF EXISTS qB FOR INTERVAL 30 minute MAX execution_time = 0.5, FOR INTERVAL 5 quarter MAX queries = 321, errors = 10 TO default;