2009/10/22 Tom Lane <tgl@sss.pgh.pa.us>:
> Pavel Stehule <pavel.stehule@gmail.com> writes:
>> 2009/10/22 Tom Lane <tgl@sss.pgh.pa.us>:
>>> Pavel Stehule <pavel.stehule@gmail.com> writes:
>>>> this is syntax column(table) necessary still?
>
>>> There is no reason to remove that.
>
>> do you know somebody who use it? It is dead code.
>
> It is not --- it's the recommended solution for emulating computed
> columns. The column-as-f(x) direction maybe isn't terribly exciting,
> but the function-as-x.col direction definitely is.
>
is it documented?
regards
Pavel Stehule
> regards, tom lane
>