SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function flattenTuple (alias ft) (children 1)
     ExpressionList (children 1)
      Identifier t
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier ft
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t_flatten_tuple