vibhatha commented on code in PR #40340:
URL: https://github.com/apache/arrow/pull/40340#discussion_r1555124425


##########
java/vector/src/main/java/org/apache/arrow/vector/TypeLayout.java:
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@@ -347,11 +360,23 @@ public Integer visit(Binary type) {
         return VARIABLE_WIDTH_BUFFER_COUNT;
       }
 
+      @Override
+      public Integer visit(ArrowType.BinaryView type) {

Review Comment:
   At the moment, I kept this unsupported and I already have created an issue 
to follow up. I am also not sure about this. But if we think about the layout, 
and keep the growing external buffer as K variable, the base minimum number of 
buffers can be defined as 2, which is validity and view buffer. But I am not 
sure if that actually make sense as layout should have that external buffer 
represented in some way. Or can we include a callback-like thing to get the 
precise value? But that is again a bit odd as layout supposed to be like an 
enum-like class. 
   
   Not exactly sure what to do here. 
   
   // TODO: https://github.com/apache/arrow/issues/40934



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