On Tue, Sep 3, 2013 at 09:32:44PM -0400, Bruce Momjian wrote:
> In this test, SELECT NULL (which internally would produce SELECT
> ROW(NULL)), returns TRUE, while SELECT ROW(NULL) and further nesting
> returns false.
>
> This has made me adjust my goal and change it so SELECT ROW(NULL) IS
> NULL returns true, and any further nesting returns false.
>
> Attached is a patch which accomplishes this, and a documentation update.
I have not heard any feedback on this patch, so I would like to apply it
to give us a nested ROW/IS NULL API we can document. It would have to
be marked in the release notes as a backward incompatibility.
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
+ It's impossible for everything to be true. +