SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function transform (alias k) (children 1)
     ExpressionList (children 4)
      Identifier s
      Literal Array_[\'a\', \'b\']
      Function array (children 1)
       ExpressionList (children 2)
        Literal Tuple_(UInt64_1, UInt64_2)
        Literal Tuple_(UInt64_3, UInt64_4)
      Literal Tuple_(UInt64_0, UInt64_0)
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier k
