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)\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'(\\\\w+)\'
        Literal \'FixedString(5)\'
