SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function multiIf (alias a) (children 1)
     ExpressionList (children 3)
      Function greater (children 1)
       ExpressionList (children 2)
        Literal UInt64_1
        Literal UInt64_2
      Literal \'Value\'
      Literal \'ElseValue\'
    Function isConstant (children 1)
     ExpressionList (children 1)
      Identifier a
