SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function extractAllGroupsHorizontal (children 1)
     ExpressionList (children 2)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'hello world\'
        Literal \'FixedString(12)\'
      Literal \'(\\\\w+)\'