如何获取clob类型的字节长度

错误的解释如下
$ oerr ora 6502
06502, 00000, "PL/SQL: numeric or value error%s"
// *Cause: An arithmetic, numeric, string, conversion, or constraint error
// occurred. For example, this error occurs if an attempt is made to
// assign the value NULL to a variable declared NOT NULL, or if an
// attempt is made to assign an integer larger than 99 to a variable
// declared NUMBER(2).
// *Action: Change the data, how it is manipulated, or how it is declared so
// that values do not violate constraints.
怀疑是你接收这个参数的过程所用的变量不能接受这么大的数值。