Srinivasa Rao Chava writes:
> 1) How to backup Large objects, because pg_dump will not backup the large
> objects. Can anybody help with some examples.
Use pg_dump 7.1 or later, it can back up large objects. Look at the man
page for the option, it escapes me at the moment.
> 2)How big is the database that postgresql can support?
unlimited
> 3)How to change the size and datatype of a column in a table.
You can't do that directly. You need to save your data (with pg_dump,
maybe), recreate the changed table, and restore your data. There are
numerous examples in the archives.
> 4) Up to which point can the data be restored? Is it upto the point of
> backup taken or upto the point of system crash?
Not sure what you mean here. Certainly you can keep storing data after
having made a backup.
--
Peter Eisentraut peter_e@gmx.net http://funkturm.homeip.net/~peter