[postgis-tickets] [PostGIS] #3888: Split core and raster extensions

[PostGIS]

#3888: Split core and raster extensions
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  Reporter:  strk         |      Owner:  pramsey
      Type:  enhancement  |     Status:  new
  Priority:  medium       |  Milestone:  PostGIS 2.5.0
 Component:  postgis      |    Version:  trunk
Resolution:               |   Keywords:
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Comment (by strk):

 >  Having it as a separate extension could conceivably allow people to
 >  install it in a separate schema other than where they installed
 >  postgis, which would make the extension unusable.

 We can add a safety check. This is already a problem for non-extension
 users, and we want to threat every user equally here. Could you ticket
 this for non-extension users of raster please ?

 > Like if a user is restoring a raster backup from 2.4.0, how are you
 > going to deal with that. Your idea of unpackaging and leaving it up to
 > the user to repackage is very disturbing.

 We cannot repackage ourselves from a script upgrade, and we don't
 really want either or our postgis upgrade scripts would depend on
 availability of raster extension. But we print a warning recommending
 to call the missing "CREATE EXTENSION postgis_raster FROM unpackaged"
 to compete the upgrade (I like your idea of NOT proposing that IFF
 the raster objects can be completely removed).

 >    With your proposal I have do do
 >
 > ALTER EXTENSION postgis UPDATE;
 > ALTER EXTENSION postgis_raster UPDATE;

 Yes, if you need both. It's the same you have to do with
 postgis_topology and address_standardizer etc. Consistent.

 >  If people really don't want raster, they should compile
 >  --without-raster

 Not everyone can compile its own PostGIS.

 As for your other proposal (encoding in version) please
 file a separate ticket so we can discuss it in depth.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3888#comment:3>
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