jpountz commented on a change in pull request #927: LUCENE-8997: : Add type of 
triangle info to ShapeField encoding
URL: https://github.com/apache/lucene-solr/pull/927#discussion_r362555275
 
 

 ##########
 File path: lucene/sandbox/src/java/org/apache/lucene/document/ShapeField.java
 ##########
 @@ -101,21 +143,95 @@ protected void setTriangleValue(int aX, int aY, boolean 
abFromShape, int bX, int
   private static final int MAXY_MINX_MINY_X_Y_MAXX = 6;
   private static final int MINY_MINX_Y_MAXX_MAXY_X = 7;
 
 Review comment:
   Indeed this change needs to be backward compatible, but is it really an 
issue here? My understanding is that with all segments you would get points 
reported as triangles, but in practice that wouldn't be an issue? And new 
indices with this change should never get queried with old versions of Lucene 
that don't know about these constants (Lucene doesn't guarantee any forward 
compatibility) so that wouldn't be an issue either?

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