upgrading to 6.4 from 6.3

Bruce Momjian wrote:

Here is the last thing I think I promised for 6.4. It is a script that
will allow 6.3.* users to upgrade to 6.4 without reloading all their
data.

It works by copying the user tables/index files to a backup directory,
destroying and recreating the database, then using the
pg_dump/pg_dumpall output to re-create the tables and indexes, without
the COPY commands. It then moves the table/index files back into the
directory.

But how about pg_log & pg_variable ?
Shouldn't nextOid, nextXid and transaction commit/abort infos
be restored ?

If it works and people like it, I will write up a manual page, and
mention it so people can use it.

I am not sure how to preserve the database owner because I need to
drop/recreate the database. Any ideas?

Vadim, I assume you did not change anything in the table or index
structure. You mentioned an index change, but I do not think you made
it, did you?

No, I didn't.

Vadim

Bruce Momjian wrote:

Here is the last thing I think I promised for 6.4. It is a script that
will allow 6.3.* users to upgrade to 6.4 without reloading all their
data.

It works by copying the user tables/index files to a backup directory,
destroying and recreating the database, then using the
pg_dump/pg_dumpall output to re-create the tables and indexes, without
the COPY commands. It then moves the table/index files back into the
directory.

But how about pg_log & pg_variable ?
Shouldn't nextOid, nextXid and transaction commit/abort infos
be restored ?

OK, I have added an 'mv' of pg_log and pg_variable from the old
instance. The only problem I see is that the postmaster is running
during the script, so shared memory is enabled. If I copy them during
that time, do they get preseved, or does the next backend overwrite
pg_variable?

I wonder if I have to stop the postmaster before I do this, and tell the
user to restart it. The new pid lock file would help in this case.

-- 
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