sql嵌入html格式显示报表

在使用监控系统报警的时候,如果显示的报警信息为纯粹的文本,会枯燥很多,而且看起来很不清晰。
比如我们要监控表空间的使用情况,输出列有表空间名,状态,区管理方式,总共的空间,使用的空间,剩余的空间等。
如果显示成下面的形式,尽管在输出中尝试使结果看起来清晰一些,但是还是事与愿违。
showtsps:Tablespace: TEST_INDEX-->Status: OLN-->Ext_MGR: LOCAL-->Total: 301843.875MB-->Free: 30945.25MB-->Used: 270898.625MB-->PFree:  10%--> <br />Tablespace: TEST_DATA-->Status: OLN-->Ext_MGR: LOCAL-->Total: 7960MB-->Free: 422.5MB-->Used: 7537.5MB-->PFree:   5%--> <br />Tablespace: ADVER_INDEX-->Status: OLN-->Ext_MGR: LOCAL-->Total: 550MB-->Free: 55.25MB-->Used: 494.75MB-->PFree:  10%--> <br />Tablespace:  showtsps:Tablespace: ACCSTAT_INDEX-->Status: OLN-->Ext_MGR: LOCAL-->Total: 301843.875MB-->Free: 30945.25MB-->Used: 270898.625MB-->PFree:  10%--> 
我们来看看改进后的效果,这样可能就更清晰一些了,当然这个只是个改进的方向而已。

Tablespace: TEST_INDEX

Status: OLN

Ext_MGR: LOCAL

Total: 301843MB

Free: 30937MB

Used: 270906MB

PFree: 10%

Tablespace: TEST_DATA

Status: OLN

Ext_MGR: LOCAL

Total: 7960MB

Free: 422MB

Used: 7537MB

PFree: 5%

Tablespace: TEST_INDEX

Status: OLN

Ext_MGR: LOCAL

Total: 550MB

Free: 55MB

Used: 494MB

PFree: 10%

Tablespace: TEST_DATA2

Status: OLN

Ext_MGR: LOCAL

Total: 45167MB

Free: 2302MB

Used: 42865MB

PFree: 5%

Tablespace: TEST_INDEX2

Status: OLN

Ext_MGR: LOCAL

Total: 13990MB

Free: 688MB

Used: 13301MB

PFree: 5%

对于这种情况,大多数情况下就是监控指标能够实现,但是展现出来的效果不明显,这样很可能就会使得这个功能没有什么实用价值。
尽管sqlplus本身提供了 markup html on的选项,但是在orabbix中还是使用受限,所以只能另辟蹊径。
检查表空间的脚本如下,只是一个参考例子。
select  
  d.tablespace_name, 
  decode(d.status, 
    'ONLINE', 'OLN',
    'READ ONLY', 'R/O',
    d.status) status,
  d.extent_management, 
  decode(d.allocation_type,
    'USER','',
    d.allocation_type) allocation_type,
  (case 
    when initial_extent < 1048576 
    then lpad(round(initial_extent/1024,0),3)||'K' 
    else lpad(round(initial_extent/1024/1024,0),3)||'M' 
  end) Ext_Size,
  NVL (a.bytes / 1024 / 1024, 0) MB,
  NVL (f.bytes / 1024 / 1024, 0) free, 
  (NVL (a.bytes / 1024 / 1024, 0) - NVL (f.bytes / 1024 / 1024, 0)) used,
  NVL (l.large / 1024 / 1024, 0) largest, 
  d.MAX_EXTENTS ,
  lpad(round((f.bytes/a.bytes)*100,0),3) pfree,
  (case when round(f.bytes/a.bytes*100,0) >= 20 then ' ' else '*' end) alrt
FROM sys.dba_tablespaces d,
  (SELECT   tablespace_name, SUM(bytes) bytes
   FROM dba_data_files
   GROUP BY tablespace_name) a,
  (SELECT   tablespace_name, SUM(bytes) bytes
   FROM dba_free_space
   GROUP BY tablespace_name) f,
  (SELECT   tablespace_name, MAX(bytes) large
   FROM dba_free_space
   GROUP BY tablespace_name) l
WHERE d.tablespace_name = a.tablespace_name(+)
  AND d.tablespace_name = f.tablespace_name(+)
  AND d.tablespace_name = l.tablespace_name(+)
  AND NOT (d.extent_management LIKE 'LOCAL' AND d.contents LIKE 'TEMPORARY')
UNION ALL
select 
  d.tablespace_name, 
  decode(d.status, 
    'ONLINE', 'OLN',
    'READ ONLY', 'R/O',
    d.status) status,
  d.extent_management, 
  decode(d.allocation_type,
    'UNIFORM','U',
    'SYSTEM','A',
    'USER','',
    d.allocation_type) allocation_type,
  (case 
    when initial_extent < 1048576 
    then lpad(round(initial_extent/1024,0),3)||'K' 
    else lpad(round(initial_extent/1024/1024,0),3)||'M' 
  end) Ext_Size,
  NVL (a.bytes / 1024 / 1024, 0) MB,
  (NVL (a.bytes / 1024 / 1024, 0) - NVL (t.bytes / 1024 / 1024, 0)) free,
  NVL (t.bytes / 1024 / 1024, 0) used, 
  NVL (l.large / 1024 / 1024, 0) largest, 
  d.MAX_EXTENTS ,
  lpad(round(nvl(((a.bytes-t.bytes)/NVL(a.bytes,0))*100,100),0),3) pfree,
  (case when nvl(round(((a.bytes-t.bytes)/NVL(a.bytes,0))*100,0),100) >= 20 then ' ' else '*' end) alrt
FROM sys.dba_tablespaces d,
  (SELECT   tablespace_name, SUM(bytes) bytes
   FROM dba_temp_files
   GROUP BY tablespace_name order by tablespace_name) a,
  (SELECT   tablespace_name, SUM(bytes_used  ) bytes
   FROM v\$temp_extent_pool
   GROUP BY tablespace_name) t,
  (SELECT   tablespace_name, MAX(bytes_cached) large
   FROM v\$temp_extent_pool
   GROUP BY tablespace_name order by tablespace_name) l
WHERE d.tablespace_name = a.tablespace_name(+)
  AND d.tablespace_name = t.tablespace_name(+)
  AND d.tablespace_name = l.tablespace_name(+)
  AND d.extent_management LIKE 'LOCAL'
  AND d.contents LIKE 'TEMPORARY'
  ORDER by 1
可以看到脚本还是相对比较复杂的,这么复杂的功能都能实现,但是展现的效果却打了折扣,导致了功能上的丰富和显示效果不太相符。
这个时候还是得考虑嵌入点html代码,自己也着实温习了一下以前html的东西。
在经过了大量的测试之后,总算做出了一些改进。
最终需要sql查出来的结果需要时下面的格式:
<table border='1' width='90%' align='center' ><tr><td width="40%">Tablespace: TEST_TABLE
SPACE_DATA</td>
<td width="10%">Status: OLN</td>       <td width="10%">Ext_MGR: LOCAL</td>
<td width="10%">Total: 29031.875MB</td>
<td width="10%">Free: 5.3125MB</td>
<td width="10%">Used: 29026.5625MB</td>
<td width="10%">PFree:   0%</td></tr></table>
<table border='1' width='90%' align='center' ><tr><td width="40%">Tablespace: TEST_TABLE2
SPACE_INDEX</td>
<td width="10%">Status: OLN</td>       <td width="10%">Ext_MGR: LOCAL</td>
<td width="10%">Total: 12876.8125MB</td>
<td width="10%">Free: 10.6875MB</td>
<td width="10%">Used: 12866.125MB</td>
<td width="10%">PFree:   0%</td></tr></table>
实现的sql的代码如下,这个时候已经不是单纯的脚本了,我叫它代码了。:)
select    
 '<table border='||chr(34)||'1'||chr(34)||' width='||chr(34)||'90%'||chr(34)||' align='||chr(34)||'center'||chr(34)||'<tr>'||
'<td width='||chr(34)||'40%'||chr(34)||'>Tablespace: '||d.tablespace_name||'</td>',   
  '<td width='||chr(34)||'10%'||chr(34)||'>Status: '||decode(d.status,   
    'ONLINE', 'OLN',  
    'READ ONLY', 'R/O',  
    d.status)||'</td>' status,  
  '<td width='||chr(34)||'10%'||chr(34)||'>Ext_MGR: '||d.extent_management||'</td>',   
  '<td width='||chr(34)||'10%'||chr(34)||'>Total: '||trunc(NVL (a.bytes / 1024 / 1024, 0))||'MB</td>' MB,  
  '<td width='||chr(34)||'10%'||chr(34)||'>Free: '||trunc(NVL (f.bytes / 1024 / 1024, 0))||'MB</td>' free,   
  '<td width='||chr(34)||'10%'||chr(34)||'>Used: '||trunc((NVL (a.bytes / 1024 / 1024, 0) - NVL (f.bytes / 1024 / 1024, 0)))||'MB</td>' used,  
  '<td width='||chr(34)||'10%'||chr(34)||'>PFree: '||lpad(round((f.bytes/a.bytes)*100,0),3)||'%</td></tr></table>' pfree  
FROM sys.dba_tablespaces d,  
  (SELECT   tablespace_name, SUM(bytes) bytes  
   FROM dba_data_files  
   GROUP BY tablespace_name) a,  
  (SELECT   tablespace_name, SUM(bytes) bytes  
   FROM dba_free_space  
   GROUP BY tablespace_name) f,  
  (SELECT   tablespace_name, MAX(bytes) large  
   FROM dba_free_space  
   GROUP BY tablespace_name) l  
WHERE d.tablespace_name = a.tablespace_name(+)  
  AND d.tablespace_name = f.tablespace_name(+)  
  AND d.tablespace_name = l.tablespace_name(+)  
  AND NOT (d.extent_management LIKE 'LOCAL' AND d.contents LIKE 'TEMPORARY')  
  AND lpad(round((f.bytes/a.bytes)*100,0),3)<=10  
UNION ALL  
select   
  '<table border='||chr(34)||'1'||chr(34)||' width='||chr(34)||'90%'||chr(34)||' align='||chr(34)||'center'||chr(34)||'<tr>'||
'<td width='||chr(34)||'40%'||chr(34)||'>Tablespace:'||d.tablespace_name||'</td>',   
  '<td>Status: '||decode(d.status,   
    'ONLINE', 'OLN',  
    'READ ONLY', 'R/O',  
    d.status)||'</td>' status,  
  '<td width='||chr(34)||'10%'||chr(34)||'>Ext_MGR: '||d.extent_management||'</td>',   
  '<td width='||chr(34)||'10%'||chr(34)||'>Total: '||trunc(NVL (a.bytes / 1024 / 1024, 0))||'MB</td>' MB,  
  '<td width='||chr(34)||'10%'||chr(34)||'>Free: '||trunc((NVL (a.bytes / 1024 / 1024, 0) - NVL (t.bytes / 1024 / 1024, 0)))||'MB</td>' free,  
  '<td width='||chr(34)||'10%'||chr(34)||'>Used: '||trunc(NVL (t.bytes / 1024 / 1024, 0))||'MB</td>' used,   
  '<td width='||chr(34)||'10%'||chr(34)||'>PFree: '||lpad(round(nvl(((a.bytes-t.bytes)/NVL(a.bytes,0))*100,100),0),3)||'%</td></tr></table>' pfree  
FROM sys.dba_tablespaces d,  
  (SELECT   tablespace_name, SUM(bytes) bytes  
   FROM dba_temp_files  
   GROUP BY tablespace_name order by tablespace_name) a,  
  (SELECT   tablespace_name, SUM(bytes_used  ) bytes  
   FROM v$temp_extent_pool  
   GROUP BY tablespace_name) t,  
  (SELECT   tablespace_name, MAX(bytes_cached) large  
   FROM v$temp_extent_pool  
   GROUP BY tablespace_name order by tablespace_name) l  
WHERE d.tablespace_name = a.tablespace_name(+)  
  AND d.tablespace_name = t.tablespace_name(+)  
  AND d.tablespace_name = l.tablespace_name(+)  
  AND d.extent_management LIKE 'LOCAL'  
  AND d.contents LIKE 'TEMPORARY'  
  AND lpad(round(nvl(((a.bytes-t.bytes)/NVL(a.bytes,0))*100,100),0),3) <= 10  
  ORDER by 1;

可以在适当的时候来尝试使用一下,效果虽然还是丑了些,不过已经做过格式化了。
改进的方向其实还是很多。比如嵌入颜色,格式布局等等都是需要改进的方向。
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