On Tue, Dec 4, 2012 at 5:57 AM, Edson Richter <edsonrichter@hotmail.com> wrote:
> In this specific case, the full length (14) is mandatory... so seems there
> is no loss or gain.
> Also, I see all varchar(...) created are by default "storage = EXTENDED"
> (from "Pg Admin"), while other datatypes (like numeric, smallint, integer)
> are "storage = MAIN".
> Can I have a gain using fixed length datatype in place of current varchar
> (like "numeric (14,0)")?
> Or changing to "char(14) check length(doc)=14" and "storage=MAIN"?
May be I am late with my reply but I would also recommend to take into
consideration the article from depesz where he explains and tests all
the textual types
http://www.depesz.com/2010/03/02/charx-vs-varcharx-vs-varchar-vs-text/.
Very useful one.
--
Sergey Konoplev
Database and Software Architect
http://www.linkedin.com/in/grayhemp
Phones:
USA +1 415 867 9984
Russia, Moscow +7 901 903 0499
Russia, Krasnodar +7 988 888 1979
Skype: gray-hemp
Jabber: gray.ru@gmail.com