SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function trimBoth (children 1)
     ExpressionList (children 2)
      Literal \'abca\' (alias arg_2)
      Literal \'a\' (alias arg_1)
    Identifier arg_1
    Identifier arg_2
