SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 4)
    Literal \'Hello\' (alias haystack)
    Literal \'l\' (alias needle)
    Literal \'\\\\1\' (alias replacement)
    Function replaceRegexpAll (children 1)
     ExpressionList (children 3)
      Function materialize (children 1)
       ExpressionList (children 1)
        Identifier haystack
      Identifier needle
      Identifier replacement
