[postgis-tickets] [PostGIS] #3978: 2.1.9--2.5.0dev upgrade fails with PostgreSQL 9.5.10

[PostGIS]

#3978: 2.1.9--2.5.0dev upgrade fails with PostgreSQL 9.5.10
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  Reporter:  strk     |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 2.5.0
 Component:  postgis  |    Version:  2.4.x
Resolution:           |   Keywords:
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Comment (by strk):

 In [changeset:"16348" 16348]:
 {{{
 #!CommitTicketReference repository="" revision="16348"
 Set availability of support function for KNN index

 Fixes upgrade from 2.1 to 2.2+
 References #3978 in trunk (2.5.0+)
 Should be backported up to 2.2 branch
 }}}

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3978#comment:1>
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