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Re: size of NULL field? - Mailing list pgsql-general

From Tom Lane
Subject Re: size of NULL field?
Date
Msg-id 6263.1019103778@sss.pgh.pa.us
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In response to Re: size of NULL field?  (dalgoda@ix.netcom.com (Mike Castle))
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dalgoda@ix.netcom.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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