[PostGIS] #5899: pg_upgrade fails restore geography because spatial_ref_sys does not exist

[PostGIS]

#5899: pg_upgrade fails restore geography because spatial_ref_sys does not exist
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  Reporter:  robe     |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.2.9
 Component:  postgis  |    Version:  3.4.x
Resolution:           |   Keywords:
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Comment (by robe):

 Replying to [comment:3 pramsey]:
 > Does the dependency entry trick not work? geography type depending on
 spatial_ref_sys?

 No it doesn't because the spatial_ref_sys table is still not loaded before
 user data.
 I didn't test myself, but Jeevan, confirmed here
 https://lists.osgeo.org/pipermail/postgis-devel/2025-May/030532.html

 snippet from email
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 Thank you, Regina

 You’re right -- this dependency alone doesn't fully resolve the issue.

 We did receive a complaint about missing data in the spatial_ref_sys
 table,
 with the error:
 ERROR: Cannot find SRID (4283) in spatial_ref_sys.

 By tweaking pg_dump, we managed to dump data for this table *before* any
 user tables accessed it. However, we later encountered a new issue:
 ERROR: relation "public.spatial_ref_sys" does not exist.

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 The ERROR: Cannot find SRID (4283) in spatial_ref_sys.I suspect is the
 first error they encountered. Which is the issue we ran into with #4405.

 I don't quite understand the second comment though, unless the relation
 "public.spatial_ref_sys" does not exist error happens because they tried
 to dump the spatial_ref_sys data before the spatial_ref_sys table was
 created.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5899#comment:4>
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