Re: pg_upgrade failure due to dependencies

Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> writes:
> On Tue, 2025-07-01 at 11:23 +0530, Nikhil Shetty wrote:
>> I was trying an upgrade from PostgreSQL 13 and PostGIS 3.1.2 TO PostgreSQL 15 and PostGIS 3.4.2 and got below error
>> pg_restore: error: could not execute query: ERROR: relation "public.spatial_ref_sys" does not exist
>> LINE 1: ...LECT proj4text, auth_name, auth_srid, srtext FROM public.spa...
>>                                                              ^
>> QUERY: SELECT proj4text, auth_name, auth_srid, srtext FROM public.spatial_ref_sys WHERE srid = 3857 LIMIT 1

> The PostGIS people must be misinformed.
> The fault is clearly theirs for marking the function st_transform(geometry, text, integer) as IMMUTABLE:

That's clearly pretty risky, but I don't understand the context here.
pg_dump always restores extensions first. Surely both this function
and the spatial_ref_sys table would be created by the PostGIS
extension(s)?

regards, tom lane