best place to declare/load XSL for use in CLR StoredProc?

How to efficiently load XSL documents which will be used in a CLR SP. I want
to avoid loading it every time the SP is invoked.
Thanks,
ChrisHello ChrisHarrington" charrington-at-activeinterface.com,

> How to efficiently load XSL documents which will be used in a CLR SP.
> I want to avoid loading it every time the SP is invoked.
How about in an table, passing it as a parameter?
Thanks,
Kent Tegels, DevelopMentor
http://staff.develop.com/ktegels/|||Kent,
Thanks for responding. This CLR SP stuff in new to me. Could you elaborate
on your suggestion? Do you mean storing the XSL in an XML column in a table?
Thanks,
Chris
"Kent Tegels" <ktegels@.develop.com> wrote in message
news:b87ad7452758c85c8a7518f6a0@.news.microsoft.com...
> Hello ChrisHarrington" charrington-at-activeinterface.com,
>
> How about in an table, passing it as a parameter?
> --
> Thanks,
> Kent Tegels, DevelopMentor
> http://staff.develop.com/ktegels/
>|||> Thanks for responding. This CLR SP stuff in new to me. Could you
> elaborate on your suggestion? Do you mean storing the XSL in an XML column
in a
> table?
I'll post an example in my blog shortly.
Thanks,
Kent Tegels, DevelopMentor
http://staff.develop.com/ktegels/|||Thanks - that would be very helpful.
Chris
"Kent Tegels" <ktegels@.develop.com> wrote in message
news:b87ad7454618c85ce91388c3f0@.news.microsoft.com...
> in a
> I'll post an example in my blog shortly.
>
> --
> Thanks,
> Kent Tegels, DevelopMentor
> http://staff.develop.com/ktegels/
>|||Hello Chris,
Been a bit too busy to post, but here's the gist of it. First, we need a
SQLCLR function that actually does the transformation. Here's that:
using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;
using System.Xml;
using System.Xml.Xsl;
using System.IO;
namespace DM.Examples
{
public partial class XmlLibrary
{
[SqlFunction(DataAccess = DataAccessKind.None, IsDeterministic =
false, IsPrecise = false, SystemDataAccess = SystemDataAccessKind.None)]
[return: SqlFacet(IsFixedLength = false, IsNullable = true, MaxSize
= -1)]
public static SqlXml ApplyTransform(SqlXml Data, SqlXml StyleSheet)
{
// on null return null, just in case.
if (Data.IsNull || StyleSheet.IsNull)
return SqlXml.Null;
// Buffer the transformed xml
MemoryStream ms = new MemoryStream();
XmlWriter xw = XmlWriter.Create(ms);
// Load and transform
XslCompiledTransform ctx = new XslCompiledTransform(false);
ctx.Load(StyleSheet.CreateReader());
ctx.Transform(Data.CreateReader(), xw);
// return the result, assuming XML compliant output
return new SqlXml(ms);
}
}
}
here's some code I wrote to test that:
declare @.d xml, @.s xml
select @.d = (select productID as '@.dbid',ProductNumber as '@.productID',Name
as 'name',Color as 'color',ListPrice as 'listPrice',Size as 'Size',SizeUnitM
easureCode
as 'sizeCode',style as 'style' from adventureworks.production.product where
not(coalesce(discontinuedDate,'2999-12-31') = 1) and FinishedGoodsFlag =
1 for xml path('product'),root('products'),element
s xsinil,type)
select @.s = bulkcolumn from openrowset(bulk 'c:\simple.xslt',single_clob)
as p
select dbo.ApplyTransform(@.d,@.s)
the "c:\simple.xlst" is left as an excercise for the reader.
Cheers,
Kent Tegels, DevelopMentor
http://staff.develop.com/ktegels/|||Hi Kent,
Thanks for the code sample. But what I am really stumped on is how to have
the xsl available as a class static so that it doesn't have to be loaded and
compiled every time the SP is invoked. Any thoughts?
Chris
"Kent Tegels" <ktegels@.develop.com> wrote in message
news:b87ad745b3b8c85df2965c9c40@.news.microsoft.com...
> Hello Chris,
> Been a bit too busy to post, but here's the gist of it. First, we need a
> SQLCLR function that actually does the transformation. Here's that:
> using System;
> using System.Data;
> using System.Data.SqlClient;
> using System.Data.SqlTypes;
> using Microsoft.SqlServer.Server;
> using System.Xml;
> using System.Xml.Xsl;
> using System.IO;
> namespace DM.Examples
> {
> public partial class XmlLibrary
> {
> [SqlFunction(DataAccess = DataAccessKind.None, IsDeterministic =
> false, IsPrecise = false, SystemDataAccess = SystemDataAccessKind.None)]
> [return: SqlFacet(IsFixedLength = false, IsNullable = true, MaxSize
> = -1)]
> public static SqlXml ApplyTransform(SqlXml Data, SqlXml StyleSheet)
> {
> // on null return null, just in case.
> if (Data.IsNull || StyleSheet.IsNull)
> return SqlXml.Null;
> // Buffer the transformed xml
> MemoryStream ms = new MemoryStream();
> XmlWriter xw = XmlWriter.Create(ms);
> // Load and transform
> XslCompiledTransform ctx = new XslCompiledTransform(false);
> ctx.Load(StyleSheet.CreateReader());
> ctx.Transform(Data.CreateReader(), xw);
> // return the result, assuming XML compliant output
> return new SqlXml(ms);
> }
> }
> }
> here's some code I wrote to test that:
> declare @.d xml, @.s xml
> select @.d = (select productID as '@.dbid',ProductNumber as
> '@.productID',Name as 'name',Color as 'color',ListPrice as 'listPrice',Size
> as 'Size',SizeUnitMeasureCode as 'sizeCode',style as 'style' from
> adventureworks.production.product where
> not(coalesce(discontinuedDate,'2999-12-31') = 1) and FinishedGoodsFlag = 1
> for xml path('product'),root('products'),element
s xsinil,type)
> select @.s = bulkcolumn from openrowset(bulk 'c:\simple.xslt',single_clob)
> as p
> select dbo.ApplyTransform(@.d,@.s)
> the "c:\simple.xlst" is left as an excercise for the reader.
> Cheers,
> Kent Tegels, DevelopMentor
> http://staff.develop.com/ktegels/
>