Question

我有一个xml

declare @EventBodyXml xml
set @EventBodyXml ='
                <LocationCopied xmlns="http://schemas.datacontract.org/2004/07/someName" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
                <Location xmlns:a="http://schemas.datacontract.org/2004/07/someAnotherName">
                <a:Name>SomeLocationName</a:Name></Location>
                </LocationCopied>'

我正在使用以下查询检索@uName变量中的位置名称 declare @uName nvarchar(100) set @uName=@EventBodyXml.query( 'declare default element namespace "http://schemas.datacontract.org/2004/07/someName"; declare namespace a="http://schemas.datacontract.org/2004/07/someAnotherName"; /LocationCopied/Location/a:Name').value('.', 'nvarchar(100)') ;

然后用@uName进行一些操作，现在想用新的@uName值更新@EventBodyXml。

@uName='SomeNewUpdatedValue'

我尝试过以下这样的事情

    set @EventBodyXml.modify('replace value of (
                declare default element namespace "http://schemas.datacontract.org/2004/07/SCS.Domain.BusinessObjectManagement.Contract.EventModel";
                declare namespace a="http://schemas.datacontract.org/2004/07/SCS.Domain.BusinessObjectManagement.Contract.ViewModel";
                /LocationCopied/Location/a:Name/text() ) with  sql:variable("@uName") ') ;

但是我收到了像

这样的错误

Msg 2205，Level 16，State 1，Line 27 XQuery [modify（）]：＆＃34;）＆＃34;是预期

Answer 1

你只是错过REPLACE

之前的命名空间位置

declare @EventBodyXml xml
set @EventBodyXml ='
                <LocationCopied xmlns="http://schemas.datacontract.org/2004/07/someName" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
                <Location xmlns:a="http://schemas.datacontract.org/2004/07/someAnotherName">
                <a:Name>SomeLocationName</a:Name></Location>
                </LocationCopied>'


declare @uName nvarchar(100)
set @uName=@EventBodyXml.query(
'declare default element namespace  "http://schemas.datacontract.org/2004/07/someName";
declare namespace a="http://schemas.datacontract.org/2004/07/someAnotherName";
/LocationCopied/Location/a:Name').value('.', 'nvarchar(100)') ;

select @uName

set @EventBodyXml.modify('
declare default element namespace "http://schemas.datacontract.org/2004/07/someName";
declare namespace a="http://schemas.datacontract.org/2004/07/someAnotherName";
replace value of (/LocationCopied/Location/a:Name/text())[1]
with sql:variable("@uName")
');

print cast(@EventBodyXml as nvarchar(max))

我在这个问题中发现了一件有趣的事情，您必须在default namespace变量中定义XML

declare @EventBodyXml xml
set @EventBodyXml ='
                <LocationCopied  xmlns="http://schemas.datacontract.org/2004/07/someName" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
                <Location xmlns:a="http://schemas.datacontract.org/2004/07/someAnotherName">
                <a:Name>XXXXXXXXXXXX</a:Name></Location>
                </LocationCopied>'


declare @uName nvarchar(100)
set @uName='yyyyyyyyyyyyy'


set @EventBodyXml.modify('
  declare default element namespace "http://schemas.datacontract.org/2004/07/someName";
  declare namespace a="http://schemas.datacontract.org/2004/07/someAnotherName";
  replace value of (/LocationCopied/Location/a:Name/text())[1]
  with sql:variable("@uName")
');

print cast(@EventBodyXml as nvarchar(max))

使用varchar变量中的值更新Type xml的SQL变量

1 个答案: