SQL Server

Insert XML into existing XML by calling InsertChildTreeAfter

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Demonstrates how to insert an XML tree or subtree into another XML document using the InsertChildTreeAfter method. SQL Server

--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    --  Build the 1st XML document:
    --  <x1>
    --      <a1>1</a1>
    --      <a2>2</a2>
    --      <a3>3</a3>
    --  </x1>

    DECLARE @xml int
    EXEC @hr = sp_OACreate 'Chilkat.Xml', @xml OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OASetProperty @xml, 'Tag', 'x1'
    EXEC sp_OAMethod @xml, 'UpdateChildContent', NULL, 'a1', '1'
    EXEC sp_OAMethod @xml, 'UpdateChildContent', NULL, 'a2', '2'
    EXEC sp_OAMethod @xml, 'UpdateChildContent', NULL, 'a3', '3'

    --  Build a 2nd XML document:

    --  <x2>
    --    <b1>11</b1>
    --    <b2>22</b2>
    --    <b3>33</b3>
    --  </x2>

    DECLARE @xml2 int
    EXEC @hr = sp_OACreate 'Chilkat.Xml', @xml2 OUT

    EXEC sp_OASetProperty @xml2, 'Tag', 'x2'
    EXEC sp_OAMethod @xml2, 'UpdateChildContent', NULL, 'b1', '11'
    EXEC sp_OAMethod @xml2, 'UpdateChildContent', NULL, 'b2', '22'
    EXEC sp_OAMethod @xml2, 'UpdateChildContent', NULL, 'b3', '33'

    --  We want to insert xml2 into xml to get this:

    --  <x1>
    --      <a1>1</a1>
    --      <x2>
    --          <b1>11</b1>
    --          <b2>22</b2>
    --          <b3>33</b3>
    --      </x2>
    --      <a2>2</a2>
    --      <a3>3</a3>
    --  </x1>

    --  Insert xml2 after "a1"

    DECLARE @index int
    EXEC sp_OAMethod @xml, 'TagIndex', @index OUT, 'a1'
    IF @index < 0
      BEGIN

        PRINT 'a1 not found.'
        EXEC @hr = sp_OADestroy @xml
        EXEC @hr = sp_OADestroy @xml2
        RETURN
      END

    EXEC sp_OAMethod @xml, 'InsertChildTreeAfter', NULL, @index, @xml2

    EXEC sp_OAMethod @xml, 'GetXml', @sTmp0 OUT
    PRINT @sTmp0

    --  The result is:

    --  <x1>
    --      <a1>1</a1>
    --      <x2>
    --          <b1>11</b1>
    --          <b2>22</b2>
    --          <b3>33</b3>
    --      </x2>
    --      <a2>2</a2>
    --      <a3>3</a3>
    --  </x1>

    --  Note: xml2 now points to the subtree within xml.
    --  For example, update "b3" and then see how it's updated within the merged document:
    EXEC sp_OAMethod @xml2, 'UpdateChildContent', NULL, 'b3', '33333333'

    EXEC sp_OAMethod @xml, 'GetXml', @sTmp0 OUT
    PRINT @sTmp0

    --  The result:

    --  <x1>
    --      <a1>1</a1>
    --      <x2>
    --          <b1>11</b1>
    --          <b2>22</b2>
    --          <b3>33333333</b3>
    --      </x2>
    --      <a2>2</a2>
    --      <a3>3</a3>
    --  </x1>

    EXEC @hr = sp_OADestroy @xml
    EXEC @hr = sp_OADestroy @xml2


END
GO