KQL Parser Doesn't Handle Kusto Lambdas

[slaymaker1907]

It looks like it just gets rid of the lambda expression and doesn't send it to the server.

%%kql
let PrettyDuration = (duration:timespan) {
    //strcat()
    format_timespan(duration, 'm')
};

MonLogin
| where logical_server_name  == ""
| where database_name =~ "" and event == "process_login_finish"
| where originalEventTimestamp  > ago(2d)
| where is_success == true and is_user_error == false
| summarize count=count(), last_ts=max(originalEventTimestamp) by ['state'], error, state_desc, NodeRole, package, lookup_state, AppName
| extend time_since = PrettyDuration(now() - last_ts)
| project-reorder ['count'], *, last_ts

The above query works when I run it with Kusto.Explorer but fails when running with Kqlmagic.

[mbnshtck]

If you want the lambda to be part of the same query, you should remove the empty line between the lambda definition and the query body. An empty line in %%kql is interpreted as a separator between different queries.