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in MS Sql there are data types that are not supported by delphi 7, the xml datatype is one example.
I wish to convert the XML datatype to Text datatype, so that i could handle it in delphi.
Is there a way to convert from xml to text?
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Data types can be converted either implicitly or explicitly. Implicit conversions are not visible to the user. SQL Server automatically converts the data from one data type to another. For example, when a smallint is compared to an int, the smallint is implicitly converted to int before the comparison proceeds.
The xml data type is a built-in data type in SQL Server and is somewhat similar to other built-in types such as int and varchar. As with other built-in types, you can use the xml data type as a column type when you create a table as a variable type, a parameter type, a function-return type, or in CAST and CONVERT.
Use UPDATETEXT to change only a part of a text, ntext, or image column in place. Use WRITETEXT to update and replace a whole text, ntext, or image field. This feature will be removed in a future version of Microsoft SQL Server.
A simple cast will suffice:
select cast(XMLCol as nvarchar(max)) as XMLCol Or for non-unicode:
select cast(XMLCol as varchar(max)) as XMLCol You can't convert explicitly to a 'text' data type.
I've added the as XMLCol to ensure that the converted data has the the same name as the column. You needn't have this, of course.
EDIT:
A few links. You are encouraged to use nvarchar(max) instead of text regardless. Microsoft have said they will be deprecating these types in future releases. nvarchar(max) ought to offer you 2GB:
http://www.petefreitag.com/item/734.cfm
http://www.teratrax.com/articles/varchar_max.html
http://msdn.microsoft.com/en-us/library/ms187752(v=SQL.90).aspx
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