-OrNull combinator return unexpected values

[UnamedRus]

Describe the unexpected behaviour
A clear and concise description of what works not as it is supposed to.

How to reproduce
ClickHouse 22.3, 22.6

SELECT argMaxOrNull(id, timestamp)
FROM
(
    SELECT
        CAST(NULL, 'Nullable(UInt32)') AS id,
        2 AS timestamp
)

Query id: 17bf3c85-de37-428f-990e-e82c78cc06fa

┌─argMaxOrNull(id, timestamp)─┐
│                           0 │  <-- expected to have NULL here
└─────────────────────────────┘

SELECT
    argMax(id, timestamp),
    argMaxOrNull(id, timestamp)
FROM
(
    SELECT
        CAST(NULL, 'Nullable(UInt32)') AS id,
        2 AS timestamp
    UNION ALL
    SELECT
        1 AS id,
        1 AS timestamp
)

Query id: 01180512-509b-481e-9833-1256cc4d01c1

┌─argMax(id, timestamp)─┬─argMaxOrNull(id, timestamp)─┐
│                     1 │                           0 │  <- expected to have 1 here as latest non-null value
└───────────────────────┴─────────────────────────────┘

Workaround for second issue:

SELECT argMaxIfOrNull(id, timestamp, id IS NOT NULL)
FROM
(
    SELECT
        CAST(NULL, 'Nullable(UInt32)') AS id,
        2 AS timestamp
    UNION ALL
    SELECT
        1 AS id,
        1 AS timestamp
)

Query id: a3f72ba8-b17c-40b3-955e-22d311c0e428

┌─argMaxOrNullIf(id, timestamp, isNotNull(id))─┐
│                                            1 │
└──────────────────────────────────────────────┘

Expected behavior
For first query, it should return NULL
For second either return 1, either confirm that argMaxOrNull working as intended.

[alexey-milovidov]

Fixed.