SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function substringIndex (children 1)
     ExpressionList (children 3)
      Literal \'www.clickhouse.com\'
      Literal \'.\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal UInt64_2
        Literal \'Int128\'
