SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function concat (children 1)
     ExpressionList (children 3)
      Function trimLeft (children 1)
       ExpressionList (children 1)
        Literal \'\'
      Function trimRight (children 1)
       ExpressionList (children 1)
        Literal \'\'
      Function trimBoth (children 1)
       ExpressionList (children 1)
        Literal \'\'