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Mann's avatar
Mann
Resolver III
6 years ago
Solved

Custom Power Query Code for refresh not to fail when there is no source data files

Hi Guys,   Is the following possible to implement in Power Query?   I am sourcing set of CSV files from a folder in Azure Blob Storage. Then I am combining these files in Power query before loadi...
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  • ImkeF's avatar
    ImkeF
    6 years ago

    Hi Mann 

    Then you add a last step to your queries that checks for existing errors and in case of error, produces an empty table. Usually it is necessary to have the column names still in place. You can hardcode such a table like so:

     #table( {"ColName1, ColName2..."}, { { } } )

     

    The step would look like so:

     

    try <PreviousStepName> otherwise  #table( {"ColName1, ColName2..."}, { { } } )

     

Anonymous's avatar
Anonymous
Not applicable
6 years ago

Hi ImkeF 

 

Do you know a solution to another scenario - return old data (vs. return an empty table) in Power BI? I can solve it in PBI Dataflows and Excel PQ, but can't figure out for PBI Desktop.

 

Thanks,

JB