Получить значение столбца XML в SQL

Question

Я пытаюсь получить доступ к DisplayName - тексту XML ниже через SQL. Использование - SDMPackageDigest.value('(/DesiredConfigurationDigest/SoftwareUpdateBundle/Annotation/DisplayName/@Text)[1]', 'varchar(MAX)') as 'Display Name' - просто возвращает значение NULL. Где в этом ошибка?

<DesiredConfigurationDigest xmlns="http://schemas.microsoft.com/SystemsCenterConfigurationManager/2009/07/10/DesiredConfiguration">
  <SoftwareUpdateBundle AuthoringScopeId="Site_54F0FA43-F0DC-403D-A5AF-4B54F58C1160" LogicalName="SUM_41a6b6d6-6976-49b5-a4c4-0121dc96189c" Version="200">
    <Annotation xmlns="http://schemas.microsoft.com/SystemsCenterConfigurationManager/2009/06/14/Rules">
      <DisplayName Text="2019-05 Servicing Stack Update for Windows 10 Version 1903 for x86-based Systems (KB4498523)" />
      <Description Text="Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer." />
    </Annotation>
    <ConfigurationMetadata SmsUniqueIdentity="41a6b6d6-6976-49b5-a4c4-0121dc96189c" Version="200">
      <Provider SourceType="default">
        <Operation Name="Detect">
          <Parameter Name="ScanTool">
            <Property Name="ScanToolId" Value="{54F0FA43-F0DC-403D-A5AF-4B54F58C1160}" />
            <Property Name="MinCatalogVersion" Value="1" />
          </Parameter>
        </Operation>
        <Operation Name="Install">
          <Parameter Name="CommandLine">
            <Property Name="CommandLine" Value="/WUSInstaller /UpdateID:41a6b6d6-6976-49b5-a4c4-0121dc96189c" />
          </Parameter>
          <Parameter Name="RequiresExclusiveHandling">
            <Property Name="RequiresExclusiveHandling" Value="True" />
          </Parameter>
        </Operation>
      </Provider>
    </ConfigurationMetadata>
    <SupersededUpdates>
      <SoftwareUpdateReference AuthoringScopeId="Site_54F0FA43-F0DC-403D-A5AF-4B54F58C1160" LogicalName="SUM_41325597-7968-4eeb-8113-6411cbbe8c90" />
    </SupersededUpdates>
    <Updates>
      <SoftwareUpdateReference AuthoringScopeId="Site_54F0FA43-F0DC-403D-A5AF-4B54F58C1160" LogicalName="SUM_775e479e-a5ca-4530-9c06-edfd298c824a" />
    </Updates>
  </SoftwareUpdateBundle>
</DesiredConfigurationDigest>

Answer 1

Пространство имен по умолчанию xmlns указано дважды в XML. Решение состоит в том, чтобы сохранить один из них как есть и назначить псевдоним второму.

SQL

-- DDL and sample data population, start
DECLARE @tbl TABLE (ID INT IDENTITY PRIMARY KEY, SDMPackageDigest XML);
INSERT INTO @tbl
VALUES
(N'<DesiredConfigurationDigest xmlns="http://schemas.microsoft.com/SystemsCenterConfigurationManager/2009/07/10/DesiredConfiguration">
    <SoftwareUpdateBundle AuthoringScopeId="Site_54F0FA43-F0DC-403D-A5AF-4B54F58C1160"
                          LogicalName="SUM_41a6b6d6-6976-49b5-a4c4-0121dc96189c" Version="200">
        <Annotation xmlns="http://schemas.microsoft.com/SystemsCenterConfigurationManager/2009/06/14/Rules">
            <DisplayName Text="2019-05 Servicing Stack Update for Windows 10 Version 1903 for x86-based Systems (KB4498523)"/>
            <Description Text="Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer."/>
        </Annotation>
        <ConfigurationMetadata SmsUniqueIdentity="41a6b6d6-6976-49b5-a4c4-0121dc96189c"
                               Version="200">
            <Provider SourceType="default">
                <Operation Name="Detect">
                    <Parameter Name="ScanTool">
                        <Property Name="ScanToolId" Value="{54F0FA43-F0DC-403D-A5AF-4B54F58C1160}"/>
                        <Property Name="MinCatalogVersion" Value="1"/>
                    </Parameter>
                </Operation>
                <Operation Name="Install">
                    <Parameter Name="CommandLine">
                        <Property Name="CommandLine"
                                  Value="/WUSInstaller /UpdateID:41a6b6d6-6976-49b5-a4c4-0121dc96189c"/>
                    </Parameter>
                    <Parameter Name="RequiresExclusiveHandling">
                        <Property Name="RequiresExclusiveHandling" Value="True"/>
                    </Parameter>
                </Operation>
            </Provider>
        </ConfigurationMetadata>
        <SupersededUpdates>
            <SoftwareUpdateReference AuthoringScopeId="Site_54F0FA43-F0DC-403D-A5AF-4B54F58C1160"
                                     LogicalName="SUM_41325597-7968-4eeb-8113-6411cbbe8c90"/>
        </SupersededUpdates>
        <Updates>
            <SoftwareUpdateReference AuthoringScopeId="Site_54F0FA43-F0DC-403D-A5AF-4B54F58C1160"
                                     LogicalName="SUM_775e479e-a5ca-4530-9c06-edfd298c824a"/>
        </Updates>
    </SoftwareUpdateBundle>
</DesiredConfigurationDigest>');
-- DDL and sample data population, end

;WITH XMLNAMESPACES (DEFAULT 'http://schemas.microsoft.com/SystemsCenterConfigurationManager/2009/07/10/DesiredConfiguration', 
    'http://schemas.microsoft.com/SystemsCenterConfigurationManager/2009/06/14/Rules' as ns2)
SELECT ID
    , col.value('@Text','VARCHAR(200)') AS Result
FROM @tbl tbl
    CROSS APPLY tbl.SDMPackageDigest.nodes('/DesiredConfigurationDigest/SoftwareUpdateBundle/ns2:Annotation/ns2:DisplayName') AS tab(col)

Вывод

+----+----------------------------------------------------------------------------------------------+
| ID |                                            Result                                            |
+----+----------------------------------------------------------------------------------------------+
|  1 | 2019-05 Servicing Stack Update for Windows 10 Version 1903 for x86-based Systems (KB4498523) |
+----+----------------------------------------------------------------------------------------------+

Answer 2

Проблема в вашем пространстве имен xml, которое не существует. Если вы удалите узлы xmlns из вашего xml, это будет работать нормально. Если вы планируете использовать xmlns в своем документе xml, он должен быть действительным.