(SQL Server) XML Sort by Content

Demonstrates the SortByContent method.

The input XML, available at http://www.chilkatsoft.com/data/fruitSort2.xml, is this:

<root>
    <fruits>
        <apples>
            <apple>fuji</apple>
            <apple>gala</apple>
            <apple>granny smith</apple>
            <apple>honeycrisp</apple>
            <apple>mcintosh</apple>
        </apples>
        <fruit>banana</fruit>
        <fruit>blackberry</fruit>
        <fruit>blueberry</fruit>
        <fruit>orange</fruit>
        <fruit>pear</fruit>
    </fruits>
</root>

Download Chilkat XML ActiveX

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @xml int
    EXEC @hr = sp_OACreate 'Chilkat.Xml', @xml OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @xSortRoot int

    DECLARE @success int

    --  The sample input XML is available at http://www.chilkatsoft.com/data/fruitSort2.xml
    EXEC sp_OAMethod @xml, 'LoadXmlFile', @success OUT, 'fruitSort2.xml'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @xml, 'LastErrorText', @sTmp0 OUT

        PRINT @sTmp0
        RETURN
      END

    --  Sort the direct children under the "fruits" node by tag:
    EXEC sp_OAMethod @xml, 'FindChild', @xSortRoot OUT, 'fruits'

    --  Sort in ascending order.
    DECLARE @bAscending int

    SELECT @bAscending = 1
    EXEC sp_OAMethod @xSortRoot, 'SortByContent', NULL, @bAscending

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

    --  Note:  The "apples" node contains child nodes, but its
    --  text content is 0-length (empty).  Therefore, when sorting in
    --  ascending order, it will be positioned before the direct
    --  children containing non-empty content.
    --  
<root>
    <fruits>
        <apples>
            <apple>granny smith</apple>
            <apple>gala</apple>
            <apple>fuji</apple>
            <apple>mcintosh</apple>
            <apple>honeycrisp</apple>
        </apples>
        <fruit>banana</fruit>
        <fruit>blackberry</fruit>
        <fruit>blueberry</fruit>
        <fruit>orange</fruit>
        <fruit>pear</fruit>
    </fruits>
</root>


    --  Sort the direct children under the "apples" node:
    EXEC sp_OAMethod @xSortRoot, 'FindChild2', NULL, 'apples'

    EXEC sp_OAMethod @xSortRoot, 'SortByContent', NULL, @bAscending
    EXEC sp_OAMethod @xml, 'GetXml', @sTmp0 OUT
    PRINT @sTmp0

    --  
<root>
    <fruits>
        <apples>
            <apple>fuji</apple>
            <apple>gala</apple>
            <apple>granny smith</apple>
            <apple>honeycrisp</apple>
            <apple>mcintosh</apple>
        </apples>
        <fruit>banana</fruit>
        <fruit>blackberry</fruit>
        <fruit>blueberry</fruit>
        <fruit>orange</fruit>
        <fruit>pear</fruit>
    </fruits>
</root>



END
GO