[PostGIS] #5317: ST_Union(rast, uniontype) treat bands with different classes as the same as first band

[PostGIS]

#5317: ST_Union(rast, uniontype) treat bands with different classes as the same as
first band
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  Reporter:  shenzhuxi  |      Owner:  robe
      Type:  defect     |     Status:  closed
  Priority:  medium     |  Milestone:  PostGIS 3.7.0
 Component:  raster     |    Version:  3.0.x
Resolution:  fixed      |   Keywords:
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Changes (by komzpa):

 * milestone:  PostGIS 3.5.7 => PostGIS 3.7.0

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5317#comment:11>
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