SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function array (children 1)
       ExpressionList
      Function multiMatchAllIndices (children 1)
       ExpressionList (children 2)
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal \'aaaa\'
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal Array_[\'.*aa.*aaa.*\', \'aaaaaa{2}\', \'\\\\(aa\\\\){3}\']