Bruce Momjian <br...@momjian.us> writes:
> Tom Lane wrote:
>> There was just some discussion about that on postgis-devel.  I think the
>> conclusion was that you would have to do the PostGIS update as a
>> separate step.  They intend to support both 1.3.x and 1.4.x on current
>> versions of Postgres for some time, so in principle you could do it in
>> either order.

> Oh, yea, you can't go from PostGIS version 1.3 to 1.4 _while_ you do the
> pg_migrator upgrade.  It has to be done either before or after
> pg_migrator is run.  I wonder how I could prevent someone from trying
> that trick.

You don't need to, because it will fail automatically.  They are using
version-numbered .so files, so C-language functions referencing the 1.3
.so will fail to load if only the 1.4 .so is in the new installation.

                        regards, tom lane

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