SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function array (alias t) (children 1)
     ExpressionList (children 2)
      Function map (children 1)
       ExpressionList (children 4)
        Literal \'a\'
        Literal UInt64_1
        Literal \'b\'
        Literal UInt64_2
      Function map (children 1)
       ExpressionList (children 4)
        Literal \'a\'
        Literal UInt64_1
        Literal \'b\'
        Literal UInt64_3
   ExpressionList (children 2)
    Function arrayMin (children 1)
     ExpressionList (children 1)
      Identifier t
    Function arrayMax (children 1)
     ExpressionList (children 1)
      Identifier t
