Question

我在Oracle 11g中使用XMLElement和XMLAgg函数来生成XML String。然后将此XML String发送到另一个系统进行解析。我想将以下文本附加到我的XML结果中。

问题是，如果按原样附加文本，SQL语句将返回以下内容 -

    <ZAVACOR_RESULTS>
      <TEST>
        <BATCH>
          &lt;BATCH_OBJECTS&gt;&lt;ORDER_NUM&gt; 0     &lt;/ORDER_NUM&gt;&lt;/BATCH_OBJECTS&gt;
        </BATCH>
      </TEST>
    </ZAVACOR_RESULTS>

我希望结果看起来像这样 -

    <ZAVACOR_RESULTS>
      <TEST>
        <BATCH>
          <BATCH_OBJECTS><ORDER_NUM>0</ORDER_NUM></BATCH_OBJECTS>
        </BATCH>
      </TEST>
    </ZAVACOR_RESULTS>

这是我的查询。任何帮助将不胜感激：

    SELECT
    XMLElement("ZAVACOR_RESULTS",
    XMLAgg( 
        XMLElement("TEST",
            XMLElement("BATCH", (case when t.batch is NULL then '<BATCH_OBJECTS>            <ORDER_NUM> 0 </ORDER_NUM></BATCH_OBJECTS>' else t.batch end)),    
            (SELECT 
                XMLAgg( 
                    XMLElement("BATCH_OBJECTS",
                        XMLElement("ORDER_NUMBER", (case when bo.ORDER_NUMBER is NULL     then 0 else bo.ORDER_NUMBER end))  
                                )
                       )
             FROM BATCH_OBJECTS bo WHERE t.SAMPLE_NUMBER = bo.OBJECT_ID and                                     
             t.SAMPLE_NUMBER = 705000088556  and t.TEST_NUMBER = 4537048 
                          )
                         )
                    )
        ).getClobVal() as XML 
    FROM TEST T WHERE t.SAMPLE_NUMBER = 705000088556 and t.test_number = 4537048;

数据关系：

TEST.TEST_NUMBER ---Number, Primary Key
TEST.BATCH --- Varchar2, Can be NULL
TEST.SAMPLE_NUMBER --- Number

BATCH_OBJECTS.BATCH --- Varchar2, Part of Composite Key
BATCH_OBJECTS.ORDER_NUMBER --- Number, Part of Composite Key

Answer 1

您需要将固定字符串转换为自己的XML对象。您尚未显示表格结构。如果test.batch是varchar2（而不是XMLType），您可以转换案例结果：

SELECT
XMLElement("ZAVACOR_RESULTS",
XMLAgg( 
    XMLElement("TEST",
        XMLElement("BATCH", xmltype(case when t.batch is NULL then '<BATCH_OBJECTS>            <ORDER_NUM> 0 </ORDER_NUM></BATCH_OBJECTS>' else t.batch end)),    
...

如果test.batch是XMLType，那么只需转换字符串文字：

SELECT
XMLElement("ZAVACOR_RESULTS",
XMLAgg( 
    XMLElement("TEST",
        XMLElement("BATCH", case when t.batch is NULL then xmltype('<BATCH_OBJECTS>            <ORDER_NUM> 0 </ORDER_NUM></BATCH_OBJECTS>') else t.batch end),    
...

这两种方式都给出了：

XML
-------------------------------------------------------
<ZAVACOR_RESULTS><TEST><BATCH><BATCH_OBJECTS>
  <ORDER_NUM> 0 </ORDER_NUM>
</BATCH_OBJECTS>
</BATCH></TEST></ZAVACOR_RESULTS>

SQL Fiddle

根据您对要尝试的内容的描述 - 使用示例数据和预期输出更容易理解 - 我认为您真正想要的是批处理对象表的外部联接，以及{{订单号的1}}如果没有一个：

NVL

SELECT XMLSerialize(CONTENT XMLElement("ZAVACOR_RESULTS", XMLElement("TEST", XMLElement("BATCH", XMLElement("BATCH_OBJECTS", XMLAgg( XMLElement("ORDER_NUMBER", nvl(bo.ORDER_NUMBER, 0)) ) ) ) ) ) INDENT SIZE = 2 ) as XML FROM TEST T LEFT JOIN BATCH_OBJECTS bo ON bo.BATCH = t.BATCH WHERE t.SAMPLE_NUMBER = 705000088556 AND t.test_number = 4537048;只是显示整齐;要传递到另一个应用程序，您可以坚持使用XMLSerialise：

getClobVal

对于<ZAVACOR_RESULTS> <TEST> <BATCH> <BATCH_OBJECTS> <ORDER_NUMBER>0</ORDER_NUMBER> </BATCH_OBJECTS> </BATCH> </TEST> </ZAVACOR_RESULTS>条记录的测试，提供：

batch_objects

SQL Fiddle

如果要将多个测试组合到一个XML文档中，则可以使用另一个级别<ZAVACOR_RESULTS> <TEST> <BATCH> <BATCH_OBJECTS> <ORDER_NUMBER>12345</ORDER_NUMBER> <ORDER_NUMBER>23456</ORDER_NUMBER> </BATCH_OBJECTS> </BATCH> </TEST> </ZAVACOR_RESULTS>：

XMLAgg

我已经包含了一些属性来区分源行：

SELECT XMLSerialize(CONTENT
    XMLElement("ZAVACOR_RESULTS",
      XMLAgg(
        XMLElement("TEST", XMLAttributes(t.TEST_NUMBER),
          XMLElement("BATCH", XMLAttributes(t.BATCH),
            XMLElement("BATCH_OBJECTS",
              XMLAgg(
                XMLElement("ORDER_NUMBER", nvl(bo.ORDER_NUMBER, 0))
              )
            )
          )
        )
      )
    ) INDENT SIZE = 2
  ) as XML
FROM TEST T
LEFT JOIN BATCH_OBJECTS bo ON bo.BATCH = t.BATCH
GROUP BY t.TEST_NUMBER, t.BATCH;

SQl Fiddle

显示＆lt;和＆gt;在Oracle XML Result中

1 个答案: