有命名空间时更新 XML

Question

我必须更新 XML 中的值：

<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" 
                  xmlns:o="urn:schemas-microsoft-com:office:office" 
                  xmlns:x="urn:schemas-microsoft-com:office:excel" 
                  xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" 
                  xmlns:html="http://www.w3.org/TR/REC-html40">
            <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
                <Author>XXXXXX</Author>
                <LastAuthor>UCB User</LastAuthor>
                <Created>2019-10-31T13:04:09Z</Created>
                <Version>14.00</Version>
            </DocumentProperties>
            <a>5</a>
        </Workbook>

在我的例子中，这个 XML 在 table tt 字段 xml_val.

目标 XPath 是 /Workbook/DocumentProperties/Created，值为 2019-10-31T13:04:09Z，必须替换为2020-01-08.

我绑定了这段代码：

select UPDATEXML(xml_val,
   '/Workbook/DocumentProperties/Created/text()','2020-01-08',
    'xmlns="urn:schemas-microsoft-com:office:spreadsheet" 
              xmlns:o="urn:schemas-microsoft-com:office:office" 
              xmlns:x="urn:schemas-microsoft-com:office:excel" 
              xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" 
              xmlns:html="http://www.w3.org/TR/REC-html40"').getClobVal() as last
from tt;

//.getClobVal() 最后是因为ORA-21500: 内部错误码，参数：[%s], [%s], [%s], [%s] , [%s], [%s], [%s], [%s] (here)

上面的代码不会改变任何东西。我认为这是因为在 DocumentProperties 标记中声明了另一个命名空间。但是我不知道如何在 UPDATEXML 子句中声明名称空间。

当我尝试使用此代码更新 /Workbook/a 中的值时，它有效：

select UPDATEXML(xml_val,
   '/Workbook/a/text()',2020-01-08,
    'xmlns="urn:schemas-microsoft-com:office:spreadsheet" 
              xmlns:o="urn:schemas-microsoft-com:office:office" 
              xmlns:x="urn:schemas-microsoft-com:office:excel" 
              xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" 
              xmlns:html="http://www.w3.org/TR/REC-html40"').getClobVal() as last
from tt;

我尝试过但无效的不同命名空间组合：

--1

xmlns="urn:schemas-microsoft-com:office:spreadsheet" 
xmlns:o="urn:schemas-microsoft-com:office:office" 
xmlns:x="urn:schemas-microsoft-com:office:excel" 
xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" 
xmlns:html="http://www.w3.org/TR/REC-html40"

--2

xmlns="urn:schemas-microsoft-com:office:office"
xmlns:o="urn:schemas-microsoft-com:office:office" 
xmlns:x="urn:schemas-microsoft-com:office:excel" 
xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" 
xmlns:html="http://www.w3.org/TR/REC-html40"

--3

xmlns="urn:schemas-microsoft-com:office:office"
xmlns:x="urn:schemas-microsoft-com:office:excel" 
xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" 
xmlns:html="http://www.w3.org/TR/REC-html40"

--4

xmlns="urn:schemas-microsoft-com:office:office"

注意：我无法删除 DocumentProperties 标记中的命名空间声明，因为此 XML 是 Excel-XML 格式文件

的一部分

Answer 1

DocumentProperties 元素及其子元素位于具有快捷方式 o 的命名空间 urn:schemas-microsoft-com:office:office 中；您需要在 Xpath 中为这些元素加上它们的名称空间前缀：

SELECT UPDATEXML(
         xml_val,
         '/Workbook/o:DocumentProperties/o:Created/text()',
         '2020-01-08',
         'xmlns="urn:schemas-microsoft-com:office:spreadsheet" 
          xmlns:o="urn:schemas-microsoft-com:office:office" 
          xmlns:x="urn:schemas-microsoft-com:office:excel" 
          xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" 
          xmlns:html="http://www.w3.org/TR/REC-html40"'
       ) AS updated_xml
FROM   tt;

| UPDATED_XML                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| <Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:html="http://www.w3.org/TR/REC-html40"><DocumentProperties xmlns="urn:schemas-microsoft-com:office:office"><Author>XXXXXX</Author><LastAuthor>UCB User</LastAuthor><Created>2020-01-08</Created><Version>14.00</Version></DocumentProperties><a>5</a></Workbook> |

db<>fiddle here

但是，UPDATEXML 已弃用，您应该使用 XMLQUERY:

SELECT XMLQuery(
         'declare default element namespace "urn:schemas-microsoft-com:office:spreadsheet"; (: :)
          declare namespace o = "urn:schemas-microsoft-com:office:office"; (: :)
          copy $i := $x modify 
          ( for $j in $i/Workbook/o:DocumentProperties/o:Created
            return replace value of node $j with $v )
          return $i'
         PASSING xml_val AS "x",
                 '2020-01-08' AS "v"
         RETURNING CONTENT
       ) AS updated_xml
FROM   tt

db<>fiddle here

有命名空间时更新 XML

UPDATEXML when there is namespaces

xml

oracle

xml-namespaces

updatexml