Let's start with table definition
.create table ExpensiveKustoQueries_Test (User: string, TimeStamp: datetime, CpuTime: timespan)
Now Ingestion with dynamic Value
.set-or-append ExpensiveKustoQueries_Test <| print User = "xx@Kusto.com", Timestamp = now(),CpuTime = totimespan("06:48:02.2656250")