SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function firstNonDefault (alias result) (children 1)
     ExpressionList (children 3)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'[]\'
        Literal \'Array(Int32)\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'[0]\'
        Literal \'Array(Int32)\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'[1, 2, 3]\'
        Literal \'Array(Int32)\'
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier result
