Function duckdb_get_timestamp_ms 

pub unsafe extern "C" fn duckdb_get_timestamp_ms(
    val: duckdb_value,
) -> duckdb_timestamp_ms

Returns the duckdb_timestamp_ms value of the given value.

@param val A duckdb_value containing a TIMESTAMP_MS @return A duckdb_timestamp_ms, or MinValue<timestamp_ms> if the value cannot be converted