On Monday, September 14, 2026, PG Doc comments form <[email protected]>
wrote:

> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/18/sql-expressions.html
> Description:
>
> To summarize, things I don't understand from the docs:
>  - where exactly the .f1 notation is documented


It probably isn’t documented behavior and thus should not be relied upon.


>  - where/why it's not allowed to be used
>  - how/why a ROW changes behavior when returned from a FUNCTION


I suspect these are just boundary issues that would be considered bugs if
this entire thing were considered documented behavior.

David J.

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