Re: size of NULL field?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: dalgoda(at)ix(dot)netcom(dot)com (Mike Castle)
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: size of NULL field?
Date: 2002-04-18 04:22:58
Message-ID: 6263.1019103778@sss.pgh.pa.us
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dalgoda(at)ix(dot)netcom(dot)com (Mike Castle) writes:
>> 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?

There's a bit in the t_infomask field for it.

regards, tom lane

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