Re: HOT for PostgreSQL 8.3 - Mailing list pgsql-hackers

From Heikki Linnakangas
Subject Re: HOT for PostgreSQL 8.3
Date
Msg-id 45D1831F.1080607@enterprisedb.com
Whole thread Raw
In response to Re: HOT for PostgreSQL 8.3  (Hannu Krosing <hannu@skype.net>)
Responses Re: HOT for PostgreSQL 8.3  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
Hannu Krosing wrote:
>> But actually that 1 free byte in the header is not currently just waste 
>> of space. If you have any nulls in your tuple, there's going to be a 
>> null bitmap in addition to the header. 1 byte is conveniently enough to 
>> store the null bitmap for a table with max 8 columns,
> 
> Are we actually doing that ? I.E are null bitmaps really allocated in 1
> byte steps nowadays ?

Yes.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com


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