1. ADO(Active Data Objects), ADO+, and XML
석사 2학기 최혜정

2. Contents Introduce XML Support in ADO 2. 6 and SQL Server 2000
XML Persistence
XML Queries via ADO
Non-SQL Queries via ADO
Joining XML and SQL Data
ADO+
Summary

3. Introduce
How ADO has progressed to include more robust XML feature set than in the past. Here we will discuss that’s supported in ADO 2.6, and its new XML properties.
Different ways in which we can persist XML via ADO, and how the Stream makes some of this possible, including a look at the ASP Response object.
How we can query SQL Server and return XML data, both using extensions to the SQL language, and querying using Xpath and mapping schemas.
How we can merge XML data sets with SQL data sets to retrieve and even modify SQL data.
Take a sneak preview look at what’s coming in the future, by investigate ADO+

4. XML Support in ADO 2. 6 and SQL Server 2000 (1/2)
The Stream Object (a stream of text or binary bytes)
to read , write, and manage the binary stream of bytes that make up a file or message.
Can take a RecordSet and save it the XML format to a Stream Object.
Can send XML directly to the Response Object, thus writing it to a client’s browser.
Can load different types of queries into a Stream Object and execute them against a SQL Server database.
Obtaining a Stream
Dim oStm
Set oStm = Server.CreateObject(“ADODB.Stream”)
1. oStm.Open = “URL=
2. oStml.Open=“d:\customer.xml”
3. sXML =“<costmer CustID=‘123’ CustName=‘XYZ’ Records’></customer>”
oStm.Open
oStm.WriteText sXML

5. XML Support in ADO 2. 6 and SQL Server 2000 (2/2)
Persistence of XML
A file (XML file), SQL Server 2000, Send across a network, ASP’s Response object
Running XML Queries
Queries Using For XML ; SQL Server 2000’s Transact SQL(T-SQL)
Queries Using annotated schema ; Xpath statement
Merging XML with relational data
T-SQL language:OpenXML function allows stored procedure.
New XML Properties
Mapping Schema ; oCmd.Properties(“Mapping Schema”) = “Orders.xml”
Base Path ; oCmd.Properties(“Base Path”) = “C:\InetPub\wwwroot\XMLDM\”
Output Stream ; oCmd.properties(“Output Stream”) = Response

6. Table Schema

7. XML Persistence (1/6) Persisting to a file Persisting to a Stream
Saving a file from RecordSet
Opening a Recordset from a file
Persisting to a Stream
Opening a Recordset from a Stream
Persisting to the Response Object
Writing a Stream to a Client
Persisting a Stream to a Client

8. Saving a file from RecordSet(2/6)
<!-- #include file="adovbs.inc" -->
<%
sConn = "Data Source=(local);Initial Catalog=Northwind;" & _
"User ID=sa;Password=;"
sProvider = "SQLOLEDB"
Set oCn = Server.CreateObject("ADODB.Connection")
oCn.Provider = sProvider
oCn.ConnectionString = sConn
oCn.CursorLocation = adUseClient
oCn.Open
Set oCmd = CreateObject("ADODB.Command")
Set oCmd.ActiveConnection = oCn
oCmd.CommandText = "SELECT CustomerID, CompanyName FROM Customers"
oCmd.CommandType = adCmdText
Set oRs = oCmd.Execute()
oRs.Save "c:\Customers.xml", adPersistXML
oRs.Close %>

9. Opening a Recordset from a file(3/6)
Set oRs = Server.CreateObject("ADODB.Recordset")
Set oRs.ActiveConnection = Nothing
oRs.LockType = adLockReadOnly
oRs.Source = "c:\Customers.xml"
oRs.Open
sTable = "<table border='1'>" & "<tr>"
For i = 0 to oRs.Fields.Count - 1
sTable = sTable & "<td><b>" & oRs.Fields(i).Name & "</b></td>"
Next
‘oRs.MoveNext
sTable = sTable & "</tr>"
Do While Not oRs.EOF
sTable = sTable & "<tr>"
sTable = sTable & "<td>" & oRs.Fields(i).Value & "</td>"
oRs.MoveNext
sTable = sTable & "</tr>"
Loop
sTable = sTable & "</table>"
Response.Write sTable
oRs.Close
Set oRs = Nothing

10. Opening a Recordset from a Stream(4/6)
Dim oStm
Dim sXML
Set oStm = Server.CreateObject("ADODB.Stream")
oStm.Charset = "Windows-1252"
oStm.Open
oStm.LoadFromFile "c:\customers.xml"
sXML = oStm.ReadText(adReadAll)
oStm.Close
1. Set oStm = Server.CreateObject("ADODB.Stream")
oStm.WriteText sXML
oStm.SaveToFile "c:\test.xml", adSaveCreateOverWrite
2. sTable = ….
Response.Write sTable
Set oStm = Nothing

11. Writing a Stream to a Client(5/6)
<%
Set oStm = Server.CreateObject("ADODB.Stream")
oStm.Charset = "Windows-1252"
oStm.Open
oStm.LoadFromFile "c:\Territories.xml"
sXML = oStm.ReadText(adReadAll)
oStm.Close
Set oStm = Nothing
Response.Write "<XML ID='MyDataIsle'>"
Response.Write sXML
Response.Write "</XML>“ %>
<SCRIPT language="VBScript" For="window" Event="onload">
Set oXML = MyDataIsle.XMLDocument
oXML.resolveExternals=false
oXML.async=false
Set oRoot = oXML.documentElement
For each oChild in oRoot.childNodes
sOutputXML = document.all("log").innerHTML
document.all("log").innerHTML = sOutputXML & "<LI>" & _
oChild.getAttribute("TerritoryDescription") & "</LI>"
Next
</SCRIPT>
<body> <UL id=log> </UL> </body>

12. Persisting a Stream to a Client(6/6)
sConn = "Data Source=(local);Initial Catalog=Northwind;" & _
"User ID=sa;Password=;"
sProvider = "SQLOLEDB"
Set oCn = Server.CreateObject("ADODB.Connection")
oCn.Provider = sProvider
oCn.ConnectionString = sConn
oCn.CursorLocation = adUseClient
oCn.Open
Set oCmd = CreateObject("ADODB.Command")
Set oCmd.ActiveConnection = oCn
oCmd.CommandText = "SELECT * FROM Territories"
oCmd.CommandType = adCmdText
Set oRs = oCmd.Execute()
oRs.Save Response, adPersistXML
oRs.Close
oCn.Close
Set oRs = Nothing ..

13. XML Queries via ADO(1/5) For XML Usage For XML via ADO
Have the ability to return XML data sets from SQL queries simply by appending the FOR XML clause
Don’t have to create the extra objects such as the RecordSet object or the XML DOM object.
For XML Template Queries
For XML URL Queries
For XML via ADO
Running a For XML Command
Running FOR XML via CommandText
Running FOR XML via CommandStream

14. Virtual Directory Setting(2/5)
See Appendix E
MS SQL Serverl -> SQL Server용 IIS 가상 디렉토리 관리

15. For XML Usage(3/5) 1. For XML Template Queries
<ROOT xmlns:sql="urn:schemas-microsoft-com:xml-sql">
<sql:query>
SELECT
Customers.CustomerID,
Customers.CompanyName,
Orders.OrderID,
Orders.OrderDate
FROM Customers
INNER JOIN Orders ON Customers.CustomerID = Orders.CustomerID
ORDER BY
Customers.CompanyName
FOR XML AUTO
</sql:query>
</ROOT>

16. Running FOR XML via CommandText(4/5)
<% sProvider = "SQLOLEDB"
sConn = "Data Source=(local);Initial Catalog=Northwind;User ID=sa"
Set oCn = Server.CreateObject("ADODB.Connection") ….
oCn.Open
Set oCmd = Server.CreateObject("ADODB.Command")
Set oCmd.ActiveConnection = oCn
sQuery = "<ROOT xmlns:sql='urn:schemas-microsoft-com:xml-sql'>" & _
"<sql:query>SELECT * FROM PRODUCTS ORDER BY PRODUCTNAME " & _
" FOR XML AUTO </sql:query></ROOT>"
oCmd.CommandText = sQuery
oCmd.CommandType = adCmdText
oCmd.Dialect = "{5D531CB2-E6Ed-11D2-B252-00C04F681B71}"
oCmd.Properties("Output Stream") = Response
Response.Write "<XML ID=MyDataIsle>"
oCmd.Execute , , adExecuteStream
Response.Write "</XML>" %>
<SCRIPT language="VBScript" For="window" Event="onload">
… oChild.getAttribute(“ProductName”)….
</SCRIPT>
<body> <UL id=log> </UL> </body>

17. Running FOR XML via CommandStream(5/5)
… sConn = "Data Source=(local);Initial Catalog=Northwind;User ID=sa"
Set oCn = Server.CreateObject("ADODB.Connection") ….
oCn.Open
Set oCmd = Server.CreateObject("ADODB.Command")
Set oCmd.ActiveConnection = oCn
sQuery = "<ROOT xmlns:sql='urn:schemas-microsoft-com:xml-sql'>" & _
"<sql:query>SELECT * FROM PRODUCTS ORDER BY PRODUCTNAME " & _
" FOR XML AUTO </sql:query></ROOT>"
Set oStm = Server.CreateObject("ADODB.Stream")
oStm.Open
oStm.WriteText sQuery, adWriteChar
oStm.Position = 0
set oCmd.CommandStream = oStm
oCmd.CommandType = adCmdText
oCmd.Dialect = "{5D531CB2-E6Ed-11D2-B252-00C04F681B71}"
oCmd.Properties("Output Stream") = Response
Response.Write "<XML ID=MyDataIsle>"
oCmd.Execute , , adExecuteStream
Response.Write "</XML>" %>
<SCRIPT language="VBScript" For="window" Event="onload">
… oChild.getAttribute(“ProductName”)….
</SCRIPT>
<body> <UL id=log> </UL> </body>

18. Non-SQL Queries via ADO(1/2)
Mapping Schema File
Define the table schema
Mapping Schema & Base Path Properties
Code Examples

19. Code Examples(2/2) sCompanyName = Request.QueryString("CompanyName") …
Set oCn = Server.CreateObject("ADODB.Connection")
oCn.Open
Set oCmd = CreateObject("ADODB.Command")
Set oCmd.ActiveConnection = oCn
oCmd.CommandText = = '" & sCompanyName & "']"
oCmd.Dialect = "{ec2a4293-e898-11d2-b1b7-00c04f680c56}"
'--- Indentify the mapping schema
oCmd.Properties("Mapping Schema") = "ch13_ex10.xml"
oCmd.Properties("Base Path") = "C:\"
oCmd.Properties("Output Stream") = Response
Response.write "<XML ID='MyDataIsle'><Customers>"
oCmd.Execute , , adExecuteStream
Response.write "</Customers></XML>"
<SCRIPT language="VBScript">
document.write
… oCurrentCustomer.getAttribute("CustID")
…. oChild.getAttribute("OrderDate")
</SCRIPT>

20. Joining XML and SQL Data(1/5)
Stored Procedures
Sp_xml_preparedocument
Translate the XML document to a data set format that SQL Server can comprehend
Sp_xml_removedocument
Removes the XML document from SQL Server’s memory when we’re done with it
The ASP page
Returning XML
Inserting Data

21. Stored Procedures(2/5)

22. The ASP page(3/5) create proc dbo.spOpenXML @sXML VarChar(2000) as
INT
EXEC
Select c.CustomerID, c.ContactName, o.OrderID, o.OrderDate
from '/ROOT/Customers', 1)
with (CustomerID varchar(10), ContactName varchar(20)) as c
INNER JOIN Orders o ON c.CustomerID = o.CustomerID
EXEC GO
<% sXMLDoc = "<ROOT>"
sXMLDoc = sXMLDoc & "<Customers CustomerID='VINET' " & _
"ContactName='Paul Henriot'>“ ….
sXMLDoc = sXMLDoc & "</ROOT>"
sQuery = "spOpenXML"
Set oCmd = Server.CreateObject("ADODB.Command")
Set oCmd.ActiveConnection = oCn
oCmd.CommandText = sQuery
oCmd.CommandType = adCmdStoredProc
= sXMLDoc
Set oRs = oCmd.Execute()
Response.Write "<ul>“ …. %>

23. Returning XML(4/5) create proc dbo.spOpenXML2 @sXML VarChar(2000) as
INT
EXEC
Select c.CustomerID, c.ContactName, o.OrderID, o.OrderDate from '/ROOT/Customers', 1)
with (CustomerID varchar(10), ContactName varchar(20)) as c
INNER JOIN Orders o ON c.CustomerID = o.CustomerID
FOR XML AUTO
EXEC GO
sQuery = "spOpenXML2" …
oCmd.CommandText = sQuery
oCmd.CommandType = adCmdStoredProc
= sXMLDoc
Response.Write "<XML ID='MyDataIsle'><ROOT>"
oCmd.Execute , , adExecuteStream
Response.Write "</ROOT></XML>“
%>
<SCRIPT language="VBScript" For="window" Event="onload">
….oChild.getAttribute("ContactName") & "</LI>"
</SCRIPT>
<body> <UL id=log> </UL> </body>

24. Inserting Data(5/5) create proc dbo.spOpenXML_Insert
@sXML Varchar(2000) as
INT
EXEC
Insert Territories
Select TerritoryID, TerritoryDescription, RegionID
from '/ROOT/Territories', 1)
with ( TerritoryID nvarchar(20), TerritoryDescription nchar(50), RegionID INT)
EXEC Go
<% sXMLDoc = "<ROOT>"
sXMLDoc = sXMLDoc & "<Territories TerritoryID='77777' " & _ ….
</ROOT>"
sQuery = "spOpenXML_Insert"
… oCmd.Execute %>

25. ADO+(1/3) Evolution The ADO+ Framework (objects) The Idea DataSet
Provided an automation API for abstracted database access for client server system. (n-tier systems)
The ADO+ Framework (objects)
DataSet
A DataSet can store many pieces of data.
It is easy to remote. And it is easy to program.
Connection ( ADOConnection)
is familiar and parallel to the classic ADO Connection Object.
is compatible with OLEDB
DataSetCommand
Pushes data into a DataSet from a Database.
SelectCommand, UpdateCommand, InsertCommand, DeleteCommand

26. ADO+(2/3) DataSet ( collection of tables)
Bridge the gap between the XML Web world and traditional corporate databases.
The Command object provides interfaces for streaming read-only forward only data.
Schema
XMLSchema
XMLData
XML
The DataSetCommand and the Connection Objects VB
Typeness of DataSet
Not only does the DataSet have internal typed storage, but there are also some nice tools to create typed accessors customized to your schema.

27. Typeness of DataSet(3/3)