订阅以下兩個過程呢，其實是輔助過程，一個是完成寫日志，一個是完成發郵件，在以後的程序中，可能會經常用到
1、寫日志過程
/**************************************************************************
name:sp_Write_log
parameter:textContext in varchar2 日志內容
create date:2003-06-01
creater:chen jiping
desc: ·寫日志,把內容記到服務器指定目錄下
·必須配置Utl_file_dir初始化參數，並保證日志路徑與Utl_file_dir路徑一致或者是其中一個
****************************************************************************/
create or replace PROCEDURE sp_Write_log(textContext VARCHAR2)
IS
file_handle UTL_FILE.file_type;
Write_content VARCHAR2(1024);
Write_file_name VARCHAR2(50);
BEGIN
--打開文件
--Write_file_name := rtrim(to_char(SYSDATE,'YYYY-MM-DD'))||'.log';
Write_file_name := 'db108_alert.log';
file_handle := UTL_FILE.FOPEN('/u01/product/admin/ora81/logs',Write_file_name,'a');
Write_content := to_char(SYSDATE,'yyyy-mm-dd hh24:mi:ss')||'||'||textContext;
--寫文件
IF UTL_FILE.IS_OPEN(file_handle) THEN
UTL_FILE.PUT_LINE(file_handle,Write_content);
END IF;
--關閉文件
UTL_FILE.Fclose(file_handle);
EXCEPTION
WHEN OTHERS THEN
IF UTL_FILE.IS_OPEN(file_handle) THEN
UTL_FILE.Fclose(file_handle);
END IF;
END sp_Write_log;
2、發送Email的過程
/**************************************************************************
name:sp_Send_mail
parameter: Rcpter in varchar2 接收者郵箱
Mail_Content in Varchar2 郵件內容
create date:2003-06-01
creater:chen jiping
desc: ·發送郵件到指定郵箱
·只能指定一個郵箱，如果需要發送到多個郵箱，需要另外的輔助程序
****************************************************************************/
create or replace procedure sp_send_mail(
Rcpter IN VARCHAR2,
Mail_Content IN VARCHAR2)
IS
conn utl_smtp.connection;
PROCEDURE send_header(NAME IN VARCHAR2, header IN VARCHAR2) AS
BEGIN
utl_smtp.write_data(conn, NAME || ': ' || header || utl_tcp.CRLF);
END;
BEGIN
conn := utl_smtp.open_connection('smtp.ur.net.cn');
utl_smtp.helo(conn, 'oracle');
utl_smtp.mail(conn, 'oracle info');
utl_smtp.rcpt(conn, Rcpter);
utl_smtp.open_data(conn);
send_header('From', 'Oracle Database');
send_header('To', '"Recipient" <'||Rcpter||'>');
send_header('Subject', 'Hello');
utl_smtp.write_data(conn, utl_tcp.CRLF || Mail_Content);
utl_smtp.close_data(conn);
utl_smtp.quit(conn);
EXCEPTION
WHEN utl_smtp.transient_error OR utl_smtp.permanent_error THEN
BEGIN
utl_smtp.quit(conn);
EXCEPTION
WHEN utl_smtp.transient_error OR utl_smtp.permanent_error THEN
NULL; -- When the SMTP server is down or unavailable, we don't have
-- a connection to the server. The quit call will raise an
-- exception that we can ignore.
END;
raise_application_error(-20000,
'Failed to send mail due to the following error: ' || SQLERRM);
END sp_send_mail;
