PL/SQL下SQL结果集以html形式发送邮件

--下面的代码段主要主要是用于发送数据库A部分数据同步到数据库B是出现的错误信息
--表syn_data_err_log_tbl主要是记录错误日志，也就是说只要表中出现了新的记录或者旧记录且mailed列标志为N，即表示需要发送邮件
--下面逐一描述代码段信息，该代码段可以封装到package.
 PROCEDURE email_on_syn_data_err_log (err_num   OUT NUMBER,
                                        err_msg   OUT VARCHAR2)
   AS
      v_msg_txt        VARCHAR2 (32767);
      v_sub            VARCHAR2 (100);
      v_html_header    VARCHAR (4000);
      v_html_content   VARCHAR (32767);
      v_count          NUMBER;
      v_log_seq        NUMBER (12);
      v_loop_count     NUMBER := 0;
 
      CURSOR cur_errlog    --使用cursor来生成表格标题部分
      IS
           SELECT '<tr >
                            <td style="vertical-align:top;padding: 5px;"> '
                  || TO_CHAR (sd.log_seq)
                  || '</td>
                            <td style="vertical-align:top;padding: 5px;"> '
                  || sd.process
                  || '</td>'
                  || '<td  style="vertical-align:top;padding: 5px;"> '
                  || sd.rec_id
                  || '</td> '
                  || '<td style="padding: 5px;"> '
                  || REPLACE (REPLACE (sd.err_msg, '<', ';'), '>', ';')
                  || '</td>'
                  || '<td  style="vertical-align:top;padding: 5px;">'
                  || TO_CHAR (sd.log_time, 'yyyy-mm-dd hh24:mi:ss')
                  || '</td>
                            </tr>',
                  sd.log_seq
             FROM syn_data_err_log_tbl sd
            WHERE sd.mailed = 'N'
         ORDER BY sd.log_seq;
   BEGIN
      err_num := common_pkg.c_suc_general;
 
      SELECT COUNT (*)    
        INTO v_count        -->统计当次需要发送的总记录数
        FROM syn_data_err_log_tbl sd
       WHERE sd.mailed = 'N';
 
      IF v_count > 0        --> 表示有记录需要发送邮件
      THEN
         SELECT 'Job process failed on ' || instance_name || '/' || host_name
           INTO v_sub       -->生成邮件的subject 
           FROM v$instance;
 
         v_html_header :=             -->定义表格的header部分信息
            '<html><header><style>
                    #log-table {
                    margin: 0;
                    padding: 0;
                    width: 90%;
                    border-collapse: collapse;
                    font: 12px "Lucida Grande", Helvetica, Sans-Serif;
                    border:1px solid #CCC;
                    }
                    #log-table td {
                    padding: 5px;
                    border:1px solid #CCC;
                    }
                    #log-table th {
                    padding: 5px;
                    background: black;
                    color: white;
                    text-align: left;
                    }
                    #log-table tr:nth-child(even) td {
                    background: #eee;
                    }
                    </style></header><body>
                             <table id="log-table"  style="width: 100%;border-collapse: collapse;font-size:12px;">';
         v_html_header :=              -->下面是拼接每一个字段的信息
            v_html_header
            || '<tr style="background: black;">
                     <th  style="color: white;width:100px;padding: 5px;">Log sequence</th>
                     <th  style="color: white;width:100px;padding: 5px;">Process</th>
                     <th  style="color: white;width:100px;padding: 5px;">Rec ID</th>
                     <th  style="color: white;width:100px;padding: 5px;">Error message</th>
                     <th  style="color: white;padding: 5px;">Log time</th></tr>';
 
         OPEN cur_errlog;     -->打开游标
 
         LOOP
            FETCH cur_errlog  
            INTO v_msg_txt, v_log_seq;
 
            EXIT WHEN cur_errlog%NOTFOUND;
            v_loop_count := v_loop_count + 1;
            v_html_content := v_html_content || v_msg_txt;   --->注意这里，不断地把从原表中的err_msg拿出来进行拼接通过v_msg_txt
 
            --Maximun record = 50 --
            IF v_loop_count > 50              --->这里的判断就是用于控制表格总共显示多少行
            THEN                              --->主要是用于如果由于需要拼接的行太多导致超过字符长度32767，因此从50行处截断
               v_html_content :=
                  v_html_header || v_html_content || '</table></body></html>';  --->这里添加html尾部
               SENDMAIL_PKG.sendmail (
                  bo_system_pkg.get_sys_para_value ('EMAIL_SENDER_HC_EMAIL'),   --->调用函数获得邮件的接收者，此处可以直接写接收者
                  v_sub,
                  v_html_content,
                  err_num,
                  err_msg);
               v_msg_txt := '';             --->注，此处对三个本地变量置空
               v_html_content := '';
               v_loop_count := 0;              
 
               UPDATE syn_data_err_log_tbl sd     --->根据log_seq字段对已经发送过的记录标记为Y
                  SET mailed = 'Y'
                WHERE sd.mailed = 'N' AND log_seq <= v_log_seq;
            -- COMMIT;
            ELSIF v_count = cur_errlog%ROWCOUNT   --->当v_count与游标取得记录数相等时，拼接表格尾部html代码，发送邮件以及更新mailed列
            THEN
               v_html_content :=
                  v_html_header || v_html_content || '</table></body></html>';
               SENDMAIL_PKG.sendmail (
                  bo_system_pkg.get_sys_para_value ('EMAIL_SENDER_HC_EMAIL'),
                  v_sub,
                  v_html_content,
                  err_num,
                  err_msg);
               v_msg_txt := '';
               v_html_content := '';
 
               UPDATE syn_data_err_log_tbl sd
                  SET mailed = 'Y'
                WHERE sd.mailed = 'N' AND log_seq <= v_log_seq;
            END IF;
         END LOOP;
 
         COMMIT;
 
         CLOSE cur_errlog;
      END IF;
   EXCEPTION
      WHEN NO_DATA_FOUND
      THEN
         err_num := common_pkg.c_fail_data_not_found;
      WHEN OTHERS
      THEN
         err_num := common_pkg.c_fail_user_define;
         err_msg := 'Fail in process SENDMAIL_PKG.email_on_syn_data_err_log. ';
   END;

gx_admin@SYBO2SZ> DECLARE
  2    ERR_NUM NUMBER;
  3    ERR_MSG VARCHAR2(32767);
  4 
  5  BEGIN
  6    ERR_NUM := NULL;
  7    ERR_MSG := NULL;
  8 
  9    GX_ADMIN.SENDMAIL_PKG.EMAIL_ON_SYN_DATA_ERR_LOG ( ERR_NUM, ERR_MSG );
 10    COMMIT;
 11  END;
 12  /
 
PL/SQL procedure successfully completed.