Re: size of NULL field?

In article <200204151933(dot)g3FJXT912721(at)candle(dot)pha(dot)pa(dot)us>,
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> wrote:
>Oh, I didn't realize the size of the NULL bitmask was zero if no nulls
>exist. Nice.

So, how does the row know if the NULL bitmask exists or not? I'm guessing
there's a structure per row somewhere that has as at least one of it's
members, a bit on whether a NULL bitmask exists or not?

If all of the members of a row become non-NULL, does the NULL bitmask go
away?

mrc

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Mike Castle dalgoda(at)ix(dot)netcom(dot)com www.netcom.com/~dalgoda/
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