CREATE OR REPLACE FUNCTION fn_md5_utf16le (InputString IN VARCHAR2)    RETURN VARCHAR2IS  retval   varchar2(50);/*******************************************************      用途: 获取字符串对应的MD5值*******************************************************/BEGIN  retval   :=   lower(utl_raw.cast_to_raw(DBMS_OBFUSCATION_TOOLKIT.MD5(INPUT_STRING   =>   convert(InputString,'AL16UTF16LE'))));  RETURN   retval;END;