On Wed, Apr 27, 2011 at 5:24 PM, Phoenix Kiula <phoenix.ki...@gmail.com> wrote: > Possibly a dumb question but there isn't much about this. > http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=postgresql+null+value+disk+space > I have some BOOLEAN columns. 90% of the cases of the columns is FALSE. Do I > save disk space by having them as NULL instead of FALSE? So my application > would have conditional code for NULL and TRUE, instead of FALSE and TRUE. > Thanks...
Yes, NULL values take no additional space, but the row needs a null bitmap so it is possible that if this was the only NULL then it could occupy more space. If you have multiple columns, then you should use NULLs. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
