Обсуждение: CHECK and IN (Sets in general) - What's the story?

Is there a known reason why the following definition fails
the parser at the IN keyword?:

create table kev_test ( my_tag  char check (my_tag in ('A', 'B', 'C')));

The keyword IN is defined in Postgres' dialect (or it seems to be), so I'm
at a loss as to the problem.

K.
-

--

Kevin O' Gorman - k_ogorman@kompass.ie - programmer, Kompass Internet

On Thu, 20 Aug 1998 k_ogorman@kompass.ie wrote:

> Is there a known reason why the following definition fails
> the parser at the IN keyword?:
>
> create table kev_test ( my_tag  char check (my_tag in ('A', 'B', 'C')));

It isn't this worse at all :-)

First, your syntax is not correct.
Second, you can change the 'IN' Clause with several 'OR' clauses.
The result would look like this:

create table kev_test ( my_tag  char) constraint tester check (my_tag =
'A' OR my_tag='B' OR my_tag = 'C');

If somebody has a solution for the 'IN' construction.... mail it!

So long,
        Holger
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