我正在尝试更新类型化XML中的属性。过去,我是通过在未类型化的对象中构建XML,然后将其设置为类型化的对象(因此避免了该问题)来完成此操作的,但是我想知道如何直接修改类型化的数据。
我的架构是:
if exists (select [xml_collection_id]
from sys.[xml_schema_collections] as [xsc]
where [xsc].name = 'xsc_test_stack'
and [xsc].[schema_id] = schema_id(N'chamomile'))
drop xml schema collection [chamomile].[xsc_test_stack];
go
create xml schema collection [chamomile].[xsc_test_stack] as N'<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:chamomile="https://github.com/KELightsey/chamomile" targetNamespace="https://github.com/KELightsey/chamomile">
<xsd:element name="test_stack">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="description" type="xsd:string" minOccurs="1" maxOccurs="1" />
<xsd:element name="test_stack_detail" type="chamomile:any_complex_type" minOccurs="0" maxOccurs="unbounded" />
<xsd:element name="test" type="chamomile:any_complex_type" minOccurs="0" maxOccurs="unbounded" />
</xsd:sequence>
<xsd:attribute name="name" type="xsd:string" use="required" />
<xsd:attribute name="test_count" type="xsd:int" use="required" />
<xsd:attribute name="pass_count" type="xsd:int" use="required" />
<xsd:attribute name="timestamp" type="xsd:dateTime" use="required" />
<xsd:anyAttribute processContents="lax" />
</xsd:complexType>
</xsd:element>
<xsd:complexType name="any_complex_type">
<xsd:complexContent>
<xsd:restriction base="xsd:anyType">
<xsd:sequence>
<xsd:any minOccurs="0" maxOccurs="unbounded" processContents="lax"/>
</xsd:sequence>
<xsd:anyAttribute processContents="lax" />
</xsd:restriction>
</xsd:complexContent>
</xsd:complexType>
</xsd:schema>';
go
我构建的结构类型的示例为:
declare @test [xml]([chamomile].[xsc_test_stack]) = N'
<chamomile:test_stack xmlns:chamomile="https://github.com/KELightsey/chamomile" name="[chamomile].[person_test].[get_age]" test_count="2" pass_count="2" timestamp="2018-06-24T15:50:19.3466667">
<description>This test stack consists of tests which validate the functionality of the age calculation for a person.</description>
</chamomile:test_stack>';
go
declare @test [xml]([chamomile].[xsc_test_stack]) = N'
<chamomile:test_stack xmlns:chamomile="https://github.com/KELightsey/chamomile" name="[chamomile].[person_test].[get_age]" test_count="2" pass_count="2" timestamp="2018-06-24T15:50:19.3466667">
<description>This test stack consists of tests which validate the functionality of the age calculation for a person.</description>
<test_stack_detail>
<any_valid_xml_goes_here />
</test_stack_detail>
</chamomile:test_stack>';
go
我尝试过的是:
set @test_stack.modify(N'replace value of (//@test_count)[1] with sql:variable("@count")');
这将返回:消息9306,第16级,状态1,第28行 XQuery [modify()]:“替换值”的目标不能是联合类型,可以找到“((attribute(test_count,xs:int)| attribute(test_count,xs:anySimpleType))?'。
set @test_stack.modify(N'declare namespace chamomile="https://github.com/KELightsey/chamomile";
replace value of (chamomile:test_stack/@test_count)[1] with sql:variable("@count")');
这将返回:消息9306,第16级,状态1,第25行 XQuery [modify()]:“替换值”的目标不能是联合类型,可以找到“((attribute(test_count,xs:int)| attribute(test_count,xs:anySimpleType))?'。
我已经花了几个小时Google对此进行了挖掘。有很多带有未类型化XML的示例,还有一些带有类型化XML的示例仍会引发相同的异常。
我希望能获得一些见识。
谢谢, 凯瑟琳
答案 0 :(得分:1)
我必须承认,我也没有找到任何简单明了的方法。似乎是一个错误,至少我对此没有任何意义。解决方法很简单,但是与您在最初几行中描述的工作非常接近:
declare @test [xml]([chamomile].[xsc_test_stack]) =
N'<chamomile:test_stack xmlns:chamomile="https://github.com/KELightsey/chamomile" name="[chamomile].[person_test].[get_age]" test_count="2" pass_count="2" timestamp="2018-06-24T15:50:19.3466667">
<description>This test stack consists of tests which validate the functionality of the age calculation for a person.</description>
</chamomile:test_stack>';
DECLARE @cnt INT=99;
DECLARE @intermediate XML=CAST(@test AS XML); --magic happens here
SET @intermediate.modify('declare namespace chamomile="https://github.com/KELightsey/chamomile";
replace value of (chamomile:test_stack/@test_count)[1] with sql:variable("@cnt")');
SET @test=@intermediate; --re-assign to typed XML
SELECT @test;