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cpinho's avatar
cpinho
Icon for Advocate I rankAdvocate I
9 years ago
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How to expand all nested tables at once table.expandtablecolumn

Hi guys,   I've an issue, when working with getting data from web (html) it is common to have a source with hundred or more nested tables. How can i expand it all at once?   I've seen a code from...
  • MarcelBeug's avatar
    9 years ago

    The code below expands all nested tables from this webpage (as an example) as requested, but I'm note sure if the result makes much sense.
    It includes an embedded recursive function fnCombineAll.

    Possibly some further refinement would be required, but at least we have a start.

    let
        Source = Web.Page(Web.Contents("https://community.powerbi.com/t5/Desktop/How-to-expand-all-nested-tables-at-once-table-expandtablecolumn/m-p/129451#U129451")),
        Data0 = Source{0}[Data],
        ChildrenWithTable = Table.SelectRows(Data0, each [Children] is table),
    
        fnCombineAll = (TableSoFar as table, newChildren as table) as table =>
        let
            Combined = Table.Buffer(Table.Combine(List.Union({{TableSoFar},newChildren[Children]}))),
            ChildrensChildrenWithTable = Table.AddColumn(newChildren, "ChildrensChildren", each Table.SelectRows([Children], each [Children] is table)),
            ChildrensChildrenCombined = Table.Combine(ChildrensChildrenWithTable[ChildrensChildren]),
            CombinedAll = if Table.RowCount(ChildrensChildrenCombined) = 0 then Combined else @fnCombineAll(Combined, ChildrensChildrenCombined) 
        in
            CombinedAll,
    
    
        CombinedAll = if Table.RowCount(ChildrenWithTable) = 0 then Data0 else fnCombineAll(Data0, ChildrenWithTable),
        #"Added Index" = Table.AddIndexColumn(CombinedAll, "Index", 1, 1),
        #"Reordered Columns" = Table.ReorderColumns(#"Added Index",{"Index", "Kind", "Name", "Children", "Text"})
    in
        #"Reordered Columns"