Nested XML with XML Explicit

I am using SQL Server 2005.

I want to assign the result of a SELECT FOR XML EXPLICIT statement having an order by clause to a XML Variable such as

DECLARE @.outputXML as XML

SET @.outputXML = (
SELECT 1 as TAG, NULL as PARENT, BatchID as [Batch!1!id], NULL as [Sequence!2!id],NULL as [Step!3!id], NULL as [Device!4!DeviceName]FROM BatchDeviceMapping WHERE BatchID = 32
UNION
SELECT 2 as Tag, 1 as Parent, BatchID, SequenceID, NULL,NULL FROM BatchDeviceMapping WHERE batchID = 32
UNION
SELECT 3 as Tag, 2 as Parent, BatchID, SequenceID, StepID, NULL FROM BatchDeviceMapping WHERE batchID = 32
UNION
SELECT 4 as Tag, 3 as Parent, BatchID, SequenceID, StepID, Device.DeviceName FROM BatchDeviceMapping
JOIN Device Device on BatchDeviceMapping.Deviceid = device.deviceid WHERE batchID = 32 Order by 3,4,5,6 FOR XML EXPLICIT)
Its always erroring with the following information
"Msg 1086, Level 15, State 1, Line 16
The FOR XML clause is invalid in views, inline functions, derived tables, and subqueries when they contain a set operator. To work around, wrap the SELECT containing a set operator using derived table syntax and apply FOR XML on top of it."

Please note: The select query is working fine with FOR XML EXPLICIT and Order By Clause - The problem is with assigning the result of SELECT to the variable.

Any help would be appreciated.

Thanks,
Loonysan

See if this works

DECLARE @.outputXML as XML

set @.outputXML =
(
select TAG,PARENT,[Batch!1!id],[Sequence!2!id],[Step!3!id],[Device!4!DeviceName] from
(SELECT 1 as TAG, NULL as PARENT, BatchID as [Batch!1!id], NULL as [Sequence!2!id],NULL as [Step!3!id], NULL as [Device!4!DeviceName]FROM BatchDeviceMapping WHERE BatchID = 32
UNION
SELECT 2 as Tag, 1 as Parent, BatchID, SequenceID, NULL,NULL FROM BatchDeviceMapping WHERE batchID = 32
UNION
SELECT 3 as Tag, 2 as Parent, BatchID, SequenceID, StepID, NULL FROM BatchDeviceMapping WHERE batchID = 32
UNION
SELECT 4 as Tag, 3 as Parent, BatchID, SequenceID, StepID, Device.DeviceName FROM BatchDeviceMapping) as A
JOIN Device Device on BatchDeviceMapping.Deviceid = device.deviceid WHERE batchID = 32 Order by 3,4,5,6 FOR XML EXPLICIT)

|||

Thanks... This modified query from yr logic works..

DECLARE @.outputXML as XML

set @.outputXML =

(select TAG,PARENT,[Batch!1!id],[Sequence!2!id],[Step!3!id],[Device!4!DeviceName] from

(SELECT 1 as TAG, NULL as PARENT, BatchID as [Batch!1!id], NULL as [Sequence!2!id],NULL as [Step!3!id], NULL as [Device!4!DeviceName]FROM BatchDeviceMapping WHERE BatchID = 32
UNION
SELECT 2 as Tag, 1 as Parent, BatchID, SequenceID, NULL,NULL FROM BatchDeviceMapping WHERE batchID = 32
UNION
SELECT 3 as Tag, 2 as Parent, BatchID, SequenceID, StepID, NULL FROM BatchDeviceMapping WHERE batchID = 32
UNION
SELECT 4 as Tag, 3 as Parent, BatchID, SequenceID, StepID, Device.DeviceName FROM BatchDeviceMapping
JOIN Device Device on BatchDeviceMapping.Deviceid = device.deviceid where batchid = 32) as A
Order by 3,4,5,6 FOR XML EXPLICIT)
SELECT @.outputXML

Thanks,
Loonysan

|||Hi,

I'm looking for a similar solution but for SQL Server 2000. Any idea ?

(The error in SQL2000 is "Incorrect syntax near 'XML'.")

Thanks
Sylvain
|||Can you give more details? The problem was not a specific one to SQL 2K5.|||

I am using SQL 2005.

I am trying to assign the result of FOX XML AUTO to a xml variable which looks something like this:

SELECT @.auditXML = (SELECT ObjectId, ObjectType, ParentId

FROM @.PermissibleChildren AS Children WHERE ObjectType = 2

UNION

SELECT [ObjectId] = MAX(ObjectId), [ObjectType] = ObjectType, [ParentId] = ParentId

FROM @.PermissibleChildren AS Children

GROUP BY ObjectType, ParentId

HAVING ObjectType = 3

FOR XML AUTO, TYPE)

It gives me this error

Msg 1086, Level 15, State 1, Procedure sf_department_openCloseFolder, Line 312

The FOR XML clause is invalid in views, inline functions, derived tables, and subqueries when they contain a set operator. To work around, wrap the SELECT containing a set operator using derived table syntax and apply FOR XML on top of it.

I have exactly the same problem as discussed in this thread. The query works fine on its own. It is only the assignment which throws this error.

Can somebody please help? I am stuck mid-way.

Thankyou,

Umaima

|||

Try this:

SELECT @.auditXML =(select objectid,ObjectType,ParentId from (SELECT ObjectId, ObjectType, ParentId

FROM @.PermissibleChildren AS Children WHERE ObjectType = 2

UNION

SELECT [ObjectId] = MAX(ObjectId), [ObjectType] = ObjectType, [ParentId] = ParentId

FROM @.PermissibleChildren AS Children

GROUP BY ObjectType, ParentId

HAVING ObjectType = 3

) as A FOR XML AUTO, TYPE)

|||

This post was extremely useful, I was trying to insert xml into a table variable where the xml was result of for XML explicit statement

Thanks

|||I had the exact same error. I solved it in the same way as you did , but my problem is that the query doesnt always run as i expect it to. Every so often Sql server throughs me back this error.
The original query worked without the error. All I did was wrap it in another select, exactly is done in the solution on this thread

6833 Parent tag ID 1 is not among the open tags. FOR XML EXPLICIT requires parent tags to be opened first. Check the ordering of the result set.

Does anybody know why that would be the case.

|||Is it possible because of bad data? Since the error seems to be random, I would check the data or any other query which gets executed before this query that might change the assumptions your current query is making.|||You are getting the error because of ordering of the data.After applying the order by clause, the result set should have the parent tag ID appear before the child tag id.You can verify that by executing the query without the for xml clause.sql