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Helper I
Helper I

Turn off table inference

I have a json document that is an array of arrays. I dont want to flatten this. The problem is that sometimes there is 1 array within the array, sometimes there is more. If there is 1, power query flattens the whole thing to be an array of objects. How can I turn this annoying "feature" off?


I realise I can just do an if statement to test if power query gives an array of arrays or array of objects but this is messy and I'd like to prevent any further phantom transformations to my data.



Community Support
Community Support

Hi, @Kurren ;

If you're trying to load a JSON Lines file, the following sample M code converts all JSON Lines input to a single flattened table automatically:

You'll then need to use an Expand operation to combine the lines together.

Power BI JSON Connection: 3 Easy Methods - Learn | Hevo (

Power Query JSON connector - Power Query | Microsoft Docs

Best Regards,
Community Support Team _ Yalan Wu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

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