Comments in XQuery

Comments in XQuery

Applies To: SQL Server 2014, SQL Server 2016 Preview

Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).

You can add comments to XQuery. The comment strings are added by using the "(:" and ":)" delimiters. For example:

declare @x xml
set @x=''
SELECT @x.query('
(: simple query to construct an element :)
<ProductModel ProductModelID="10" />

Following is another example in which a query is specified against an Instruction column of the xml type:

SELECT Instructions.query('
(: declare prefix and namespace binding in the prolog. :)
     declare namespace AWMI="";
  (: Following expression retrieves the <Location> element children of the <root> element. :)
') as Result
FROM Production.ProductModel
where ProductModelID=7

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