[postgis-tickets] [PostGIS] #4272: Improve "unable to compute statistics" notice message

[PostGIS]

#4272: Improve "unable to compute statistics" notice message
-------------------------+---------------------------
 Reporter:  Algunenano   |      Owner:  Algunenano
     Type:  enhancement  |     Status:  assigned
 Priority:  medium       |  Milestone:  PostGIS 3.0.0
Component:  postgis      |    Version:  trunk
 Keywords:               |
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 Getting this when running analyze doesn't really tell me anything:
 {{{
 gis=# analyze;
 NOTICE:  no non-null/empty features, unable to compute statistics
 NOTICE:  no non-null/empty features, unable to compute statistics
 NOTICE:  no non-null/empty features, unable to compute statistics
 NOTICE:  no non-null/empty features, unable to compute statistics
 }}}

 Things I think could be improved:
 - Clarify that this is a PostGIS message.
 - If possible, indicate which schema.table and column was analyzed.
 - Indicate which mode failed (2-D, N-D)

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4272>
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