Re: database files are incompatible with server

On 8/22/19 7:12 PM, Ron wrote:
> On 8/22/19 8:49 PM, Adrian Klaver wrote:
>> On 8/22/19 6:29 PM, Ron wrote:
>>> On 8/22/19 7:08 PM, Adrian Klaver wrote:
>>>> On 8/22/19 4:52 PM, Igal @ Lucee.org wrote:
>>>>> I have a data directory that was created by Postgres 12 (I thought
>>>>> beta 3 but now am not sure anymore) running in Docker.
>>>>>
>>>>> I have installed Postgres 12b3 as a Systemd service and am trying
>>>>> to set the cluster to the same PGDATA.  I have set the owner of the
>>>>> directory to postgres:postrgres, and the permissions to 0700, but
>>>>> I'm getting the following error:
>>>>>
>>>>> 2019-08-22 23:40:48.759 UTC [23044] FATAL:  database files are
>>>>> incompatible with server
>>>>> 2019-08-22 23:40:48.759 UTC [23044] DETAIL:  The database cluster
>>>>> was initialized with CATALOG_VERSION_NO  201906161, but the server
>>>>> was compiled with CATALOG_VERSION_NO 201907221.
>>>>
>>>> So the cluster is from an older version then the server.
>>>
>>> Aren't Pg files supposed to be compatible within minor versions?
>>>
>>
>> Betas are a moving target so that does not hold:
>>
>> https://www.postgresql.org/developer/beta/
>>
>> "Features are subject to changes that are backwards incompatible at
>> any time during the development of the betas, and could possibly be
>> removed altogether."
>
> Features as in the on-disk structure?
>

Short version:
T
he error was about the catversion which tracks the system catalog state.
Adding/subtracting features can change that state and make clusters
incompatible.

Long version:

https://git.postgresql.org/gitweb/?p=postgresql.git;a=blob;f=src/include/catalog/catversion.h;h=fe44cae3ff453ccc02e6c56548c9311b5777bf1f;hb=0ab7110bcbcce5ff58afb32e7871c54e87502139

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com