Grzegorz Jaśkiewicz wrote:
well, as a rule of thumb - unless you can't think of a default value of column - don't use nulls. So using nulls as default 'idunno' - is a bad practice, but everybody's opinion on that differ.
I don't understand this point of view. The concept of null was introduced into the SQL vernacular by Codd and Date expressly to represent unknown values.
-- Guy Rouillier -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
