I've read this Peter's post:

http://petereisentraut.blogspot.com/2010/04/news-from-sql-standard.html

which says in SQL2011 has a new feature:

> Combined data change and retrieval. PostgreSQL does something like this with 
> RETURNING, but this feature is more elaborate and allows the writing of 
> "delta tables".

And I heard from sources that this "delta table" contains something
like writeable CTEs. Couldn't you share something about it if
possible? I just don't like to design something that will be similar
to but different from the standard.

Regards,

-- 
Hitoshi Harada

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