Kudu Conditional UPSERT INTO - impala

Question

Does Kudu support conditions on the UPDATE portion of UPSERT INTO?
Can I provide a conditional clause to only update given values based on a comparison between the insert values and destination table?
The actual use case is to update a timestamp column with the latest.
Here's the behavior as I imagine it.
CREATE TABLE my_first_table
(
id INT,
name STRING,
status INT,
PRIMARY KEY(id)
)
PARTITION BY HASH PARTITIONS 4
STORED AS KUDU;
INSERT INTO my_first_table VALUES (1, "lee", 101), (2 "shiv", 102), (3,"bob", 103);
--CONDITION FALSE, UPDATE NOT PERFORMED
UPSERT INTO my_first_table AS t
VALUES (3, "bobby", 100) AS v
WHERE v.status > t.status
+----+------+--------+
| id | name | status |
+----+------+--------+
| 1 | lee | 101 |
| 2 | shiv | 102 |
| 3 | bob | 103 |
+----+------+--------+
--CONDITION TRUE, UPDATE PERFORMED
UPSERT INTO my_first_table AS t
VALUES (3, "bobby", 100) AS v
WHERE v.status < t.status
+----+------+--------+
| id | name | status |
+----+------+--------+
| 1 | lee | 101 |
| 2 | shiv | 102 |
| 3 | bobby| 100 |
+----+------+--------+
In the case where 3 does not exist, it should insert.
Is there an elegant workaround if not?

Answer 1

A solution I found was to use a LEFT JOIN and filter in the SELECT expression. So say we have an table to_upsert identical to the destination table with all our potential upserts...
INSERT INTO to_upsert VALUES (3, "bobby" 100), (5, "newgal", 600);
UPSERT INTO my_first_table
SELECT to_upsert.id, to_upsert.name, to_upsert.status
FROM to_upsert
LEFT JOIN my_first_table ON to_upsert.id = my_first_table.id
WHERE my_first_table.status > to_upsert.status OR my_first_table.id IS NULL;
SELECT * FROM my_first_table;
+----+--------+--------+
| id | name | status |
+----+--------+--------+
| 3 | bobby | 100 |
| 1 | lee | 101 |
| 2 | shiv | 102 |
| 5 | newgal | 600 |
+----+--------+--------+
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