Martijn van Oosterhout wrote:
On Wed, Dec 20, 2006 at 07:20:14AM -0600, Kenneth Marshall wrote:
On Wed, Dec 20, 2006 at 01:26:59PM +0100, Peter Eisentraut wrote:
Am Mittwoch, 20. Dezember 2006 04:44 schrieb Tom Lane:
If you can show me a reasonably bulletproof or machine-checkable way to
keep the two kinds of column numbers distinct, I'd be all for it.
The only way I can see is to make the domains of the numbers distinct.

Negative vs. positive numbers?

Negative is used by system columns. Just adding some large constant
(say 10000) should be enough.

Have a nice day,

Or we could divide the positive number space in two, by starting at 2^14 (attnums are int2). Then a simple bitmask test would work to distinguish them.



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