Re: Fixed length data types issue
От | mark@mark.mielke.cc |
---|---|
Тема | Re: Fixed length data types issue |
Дата | |
Msg-id | 20060914215724.GA5322@mark.mielke.cc обсуждение исходный текст |
Ответ на | Re: Fixed length data types issue (Gregory Stark <stark@enterprisedb.com>) |
Список | pgsql-hackers |
On Thu, Sep 14, 2006 at 10:21:30PM +0100, Gregory Stark wrote: > >> One very nifty trick would be to fix "char" to act as CHAR(), and map > >> CHAR(1) automatically to "char". > > Sorry, probably a stupid idea considering multi-byte encodings. I > > suppose it could be an optimization for single-byte encodings, but that > > seems very limiting. > No, there are lots of single-byte encoding databases. And one day we'll have > per-column encoding anyways and there are lots of databases that have columns > that want to be one-character ascii encoded fields. > > It's limited but I wouldn't say it's very limiting. In the cases where it > doesn't apply there's no way out anyways. A UTF8 field will need a length > header in some form. Declaring a column as ASCII should allow for char(8) to mean the same as byte(8) with text semantics. byte(8) shouldn't require a length header. :-) Cheers, mark -- mark@mielke.cc / markm@ncf.ca / markm@nortel.com __________________________ . . _ ._ . . .__ . . ._. .__ . . . .__ | Neighbourhood Coder |\/| |_| |_| |/ |_ |\/| | |_ | |/ |_ | | | | | | \ | \ |__ . | | .|. |__ |__ | \ |__ | Ottawa, Ontario, Canada One ring to rule them all, one ring to find them, one ring to bring them all and in the darkness bindthem... http://mark.mielke.cc/
В списке pgsql-hackers по дате отправления: