Re: Migration Between Releases

George Wilk написа:
> Could someone clarify the database dump/restore requirement for postgres
> upgrades between major releases?
>
> The online help chapter "23.5. Migration Between Releases" states that:
>
>
>
> As a general rule, the internal data storage format is subject to change
> between major releases of PostgreSQL (where the number after the first dot
> changes). This does not apply to different minor releases under the same
> major release (where the number after the second dot changes); these always
> have compatible storage formats. For example, releases 7.2.1, 7.3.2, and 7.4
> are not compatible, whereas 7.2.1 and 7.2.2 are.
>
>
>
> I thought that the major release was the first number in the versioning
> schema, the second represented minor release, and the third would be the
> maintenance release or revision number (i.e. 8.2.4). I need to understand
> this better for the sake of writing install scripts for my own Solaris
> packages. Originally, my scripts were checking for the difference in the
> major release between the output of "postgres -version" and PG_VERSION file,
> looking at the first module of the versioning schema (i.e. 8 in "8.2.4").
> Is this still true, or should I be checking the minor release as well?

http://www.postgresql.org/support/versioning

--
Milen A. Radev