SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function CAST (children 1)
     ExpressionList (children 2)
      Function multiIf (children 1)
       ExpressionList (children 5)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier number
          Literal UInt64_1
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal NULL
          Literal \'Variant(String, UInt64)\'
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier number
          Literal UInt64_2
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'Hello\'
          Literal \'Variant(String, UInt64)\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Identifier number
          Literal \'Variant(String, UInt64)\'
      Literal \'UInt64\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_6
