(SQL Server) Update an XML Attribute

Demonstrates how to update XML attributes.

The output XML is this:

<abc b="pear" c="orange" a="130">Test</abc>

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @xml int
    -- Use "Chilkat_9_5_0.Xml" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Xml', @xml OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @xml, 'LoadXml', @success OUT, '<abc a="123" b="apple">Test</abc>'

    -- The UpdateAttribute and AddOrUpdateAttribute methods
    -- are identical.  Both will replace the attribute's value if it
    -- already exists, or insert a new attribute if it does not yet exist.

    -- Change the value of attribute "b" to "pear".
    EXEC sp_OAMethod @xml, 'UpdateAttribute', @success OUT, 'b', 'pear'

    -- Because no attribute named "c" exists, UpdateAttribute
    -- will create it:
    EXEC sp_OAMethod @xml, 'UpdateAttribute', @success OUT, 'c', 'orange'

    -- If an attribute's value is an integer, the AddToAttribute
    -- method may be called to update it by adding an integer value.
    -- For example, update the value of "a" to "130" by adding 7.
    EXEC sp_OAMethod @xml, 'AddToAttribute', NULL, 'a', 7

    -- Examine the result:
    EXEC sp_OAMethod @xml, 'GetXml', @sTmp0 OUT
    PRINT @sTmp0

    EXEC @hr = sp_OADestroy @xml


END
GO