Forum Discussion

Luizao_f's avatar
Luizao_f
Brass Contributor
Aug 27, 2021

(KQL) calling a workspace() using a variable for cross-workspace query

Dear, I need/want to call a (cross) LogAnalytics workspace using a variable. Something like the following:   let work_id="xyz"; workspace(work_id).Syslog   I declare the workspace value in a var...
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Anders Bengtsson's avatar
Anders Bengtsson
Former Employee
Aug 31, 2021
Hi,
Is it possible for you to share a bit more about the process you are trying to solve? I was thinking if you can set the workspace ID before you send the query to the workspace.
  • Luizao_f's avatar
    Luizao_f
    Brass Contributor
    Aug 31, 2021

    Good afternoon, @Anders.
    Below is the data filled in the table.
    In the example below, I pass the workspace id inside the workspace() expression to consult the cross logs of the syslog table and I have the expected results, as shown in the image.

    "Query"
    workspace("id_workspace").Syslog
    | where TimeGenerated >= ago(10m)

    But when I declare the same id in a variable and pass the variable in the workspace expression, it reports an error.
    "Query"
    let var_wor = "id_workspace";
    workspace(var_wor).Syslog
    | where TimeGenerated >= ago(10m)

    I found it strange, since it's the same string, what I'm doing is just passing it as a variable.
    I need this feature because I'm designing the structure via Azure Lighthouse and I'm going to use variable to store the values of the workspaces.