[PostGIS] #5735: ST_TRANSFORM uses Helmert transformation instead of NTV2 grid (SRID's : 3812 <->31370)

[PostGIS]

#5735: ST_TRANSFORM uses Helmert transformation instead of NTV2 grid (SRID's :
3812 <->31370)
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  Reporter:  martinvdb  |      Owner:  rouault
      Type:  defect     |     Status:  new
  Priority:  medium     |  Milestone:  PostGIS 3.4.3
 Component:  postgis    |    Version:  3.4.x
Resolution:             |   Keywords:  ST_TRANSFORM Belgium NTV2
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Comment (by rouault):

 @martinvdb Can you post an example (using for example just a point) of the
 ST_Transform() invokation you tried, what you got and what you expected as
 result?
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5735#comment:2>
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