Hi Experts,
Bit involved this, here goes.
My investigations into an issue started with the error being returned from a call to sp_xml_preparedocument:
XML parsing error: An Invalid character was found in text content.
I read up on this, and duly changed the @xmlfile parameter being passed to the call:
exec sp_xml_preparedocument @idoc output, @xmlfile
..to an ntext column.
This worked ok, until I realised that the client code (which is going to be a pain to change at this stage), passes the encoding header:
So, this meant, I now received the error:
XML parsing error: Switch from current encoding to specified encoding not supported.
If I did a replace of this encoding within QA and called my proc, using:
encoding="windows-1251"
...then all was good, so I figured I could just run this find/replace within my stored proc on the ntext XML before passing it to the sp_xml_preparedocument statement.
So now it gets really interesting/spikey.
I'm trying to use UPDATETEXT to amend the ntext field, which I can successfully do, but only if I send the @xmlfile contents into a temporary table. However, the xp_xml_preparedocument statement won't accept a column, it insists on a variable.
Obviously SQL has succeeded in closing off all my useful options, by returning:
The assignment operator operation cannot take a ntext data type as an argument.
...when I try and set the amended data in the table, back to the variable.
Please help!
Below is the excerpt from the proc:
*******************************************************
CREATE PROCEDURE docsadm.ao_sp_set_subscribedmatters
@user_id varchar(20),
@xmlfile ntext,
@confirm_remove_all bit=0,
@debug bit=0
AS
--environment
set nocount on
--temp tables
--create temporary table to hold xmlfile, so that updatetext functions
--UPDATETEXT does not appear to work against ntext variables
if object_id('tempdb.dbo.#xmlfile') is not null drop table #xmlfile
create table #xmlfile
(xmlfile ntext)
--declarations
declare @idoc int
declare @nfindtxt nvarchar(200)
declare @nreplacetxt nvarchar(200)
declare @txtlen int
declare @ptr binary(16)
declare @pos int
--Insert XML text into Table
insert #xmlfile select @xmlfile
--Replace encoding header in XML to fix entended character issues
select @nfindtxt=N'encoding="utf-8"'
select @nreplacetxt=N'encoding="windows-1251"'
select @txtlen=len(@nfindtxt)
select @ptr=textptr(xmlfile) from #xmlfile
select @pos=charindex(@nfindtxt, @xmlfile)-1
updatetext #xmlfile.xmlfile @ptr @pos @txtlen @nreplacetxt
--select xmlfile from #xmlfile
--select @xmlfile=(select xmlfile from #xmlfile)
--create an internal representation of the XML doc
--exec sp_xml_preparedocument @idoc output, @xmlfile
exec sp_xml_preparedocument @idoc output, @xmlfile
go
|
