Re: Updating postgres 7.4.5 to 8 via cygwin

[Reini Urban <rurban(at)x-ray(dot)at>]

Nick Texidor schrieb:
> I was wondering whether someone can help me.   I already have postgres 
> 7.4.5 running under cygwin on my web server, and I've looked into 
> installing the native version of 8, but it looks like there is a bit of 
> dumping/importing of database to be done.   I noticed that postgres 8 is 
> available under cygwin, and it came up as an update.  If I install it 
> through cygwin, is there any messing around with databases to be done?  
> Is that an easier option than installing the native version and moving 
> from a cygwin version?

Installing a native version will create a new database.
Upgrading cygwin to 8 will leave you with a non-accessible database.

So if you need the data from the old database, you MUST export it.

See the cygwin announcement, which describes it in detail.
http://article.gmane.org/gmane.os.cygwin.announce/2310

Which says:
Before you upgrade a postgresql package to a new new major or
minor version (7.4 => 8.0 => 8.1 => 8.2), be sure to dump all your data
before!
With the new package you will not be able to access your old databases.
=> http://www.postgresql.org/docs/8.2/static/app-pg-dumpall.html
Minor subrelease updates (e.g. 8.2.4 to 8.2.5) can safely access the
same database.
--
Reini Urban
http://phpwiki.org/  http://murbreak.at/