Re: ALTER EXTENSION UPGRADE, v3

On Feb 2, 2011, at 6:45 AM, Dimitri Fontaine wrote:

> Well, you write 3 scripts.
>
> Let's consider an example, the lo contrib, with its 3 objects:
>
>  CREATE DOMAIN lo AS pg_catalog.oid;
>  CREATE OR REPLACE FUNCTION lo_oid(lo) …
>  CREATE OR REPLACE FUNCTION lo_manage() …
>
> Now, the upgrade script from version NULL to 1.0 is
>
>  alter domain @extschema@.lo set extension lo;
>  alter function @extschema@.lo_oid(lo) set extension lo;
>  alter function @extschema@.lo_manage() set extension lo;
>
> The upgrade script from version 1.0 to 2.0 is, let's say:
>
>  CREATE OR REPLACE FUNCTION @extschema@.lo_newfunc() …
>
> So the upgrade script from version NULL to 2.0 is:
>
>  alter domain @extschema@.lo set extension lo;
>  alter function @extschema@.lo_oid(lo) set extension lo;
>  alter function @extschema@.lo_manage() set extension lo;
>  CREATE OR REPLACE FUNCTION @extschema@.lo_newfunc() …
>
> If as an extension author you're kind enough to provide all those 3
> scripts and the upgrade setup in the control file, then the user can
> issue ALTER EXTENSION lo UPGRADE; and have all your cases covered
> automatically.

As an extension author, I can't emphasize enough how much I hate the redundancy of this approach.

Best,

David