I have a table that lists some user details.

The Data column contains data using XML. Below is a sample from the table.

<UserInfo xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/ComponentFramework">
<ActiveDirectoryUser>false</ActiveDirectoryUser>
<CanUpdateMasterData>false</CanUpdateMasterData>
<CanUploadFiles>false</CanUploadFiles>
<ChangePassword>false</ChangePassword>
<CustomDataPageSize>false</CustomDataPageSize>
<CustomMasterDataPageSize>false</CustomMasterDataPageSize>
<DataPageSize>100</DataPageSize>
<Disabled>true</Disabled>
<Displayname>Pål</Displayname>
<Email i:nil="true" />
<EnforcePasswordPolicy>false</EnforcePasswordPolicy>
<EnvironmentIdList xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" />
<GUID i:nil="true" />
<GeoLocation>
    <City i:nil="true" />
    <Country i:nil="true" />
    <CountryCode i:nil="true" />
    <Ip i:nil="true" />
    <Isp i:nil="true" />
    <Lat>0</Lat>
    <Lon>0</Lon>
    <Org i:nil="true" />
    <Query i:nil="true" />
    <Region i:nil="true" />
    <RegionName i:nil="true" />
    <Status i:nil="true" />
    <Timezone i:nil="true" />
    <Zip i:nil="true" />
</GeoLocation>
<GroupIdList xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" />
<HttpLink i:nil="true" />
<JobIdList xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" />
<LastLoggedIn>2015-06-11T19:04:44.6407074 05:30</LastLoggedIn>
<MasterDataPageSize>1000</MasterDataPageSize>
<ModifyImages>false</ModifyImages>
<QualityControl>false</QualityControl>
<QualityControlGroupId i:nil="true" />
<Review>false</Review>
<ReviewGroupId i:nil="true" />
<SecurityToken i:nil="true" />
<ShowTrackerPage>false</ShowTrackerPage>
<StatIdList xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" />
<Username>&lt;new user&gt;</Username>
<Usertype>Power</Usertype>
</UserInfo>

I'm trying to match users that have their accounts disabled. Using the below sql query.

select * from [ATC_Config].[dbo].[Users] where [ATC_Config].[dbo].[Users].[Data].value('/UserInfo/Disabled[1]','nvarchar(MAX)') = 'true'

But SSMS is giving me an error Cannot call methods on nvarchar(max) and highlight my column which Data. I tried few suggestions in SO and in MSDN but nothing helped. Can someone show me what am I doing wrong?

CodePudding user response：

Because your sample XML contains a default namespace definition you'll need to declare that in your value XQuery or via with xmlnamespaces.

Here's how you can do that with value...

select *
from dbo.Users
where cast(Data as xml).value(N'
  declare default element namespace "http://schemas.datacontract.org/2004/07/ComponentFramework";
  (/UserInfo/Disabled)[1]',N'nvarchar(max)') = N'true';

Or by using with xmlnamespaces:

with xmlnamespaces(default N'http://schemas.datacontract.org/2004/07/ComponentFramework')
select *
from dbo.Users
where cast(Data as xml).value(N'(/UserInfo/Disabled)[1]', N'nvarchar(max)') = N'true';

CodePudding user response：

You need to add the namespace, and you need to cast the value to xml. This is easier if you use with because it applies to the whole query.

A slightly more efficient version of @AlwaysLearning's answer is to use exist and /text()

with xmlnamespaces (
    default N'http://schemas.datacontract.org/2004/07/ComponentFramework'
)
select *
from dbo.Users u
where cast(u.Data as xml).exist(N'/UserInfo/Disabled[text() = "true"]') = 1;

db<>fiddle

I strongly suggest you store the Data column as xml in the first place, as casting is inefficient.