SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Identifier v
    Function variantElement (children 1)
     ExpressionList (children 2)
      Identifier v
      Literal \'Map(String, UInt64)\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function format (children 1)
       ExpressionList (children 3)
        Identifier JSONEachRow
        Literal \'v Variant(String, Map(String, UInt64))\'
        Literal \'{"v" : null}, {"v" : "string"}, {"v" : {"a" : 42, "b" : 43, "c" : null}}, {"v" : {"c" : 44, "d" : [1,2,3]}}\'
 Identifier JSONEachRow
