ihuzenko commented on a change in pull request #1899: DRILL-7445: Create batch 
copier based on result set framework
URL: https://github.com/apache/drill/pull/1899#discussion_r347383123
 
 

 ##########
 File path: 
exec/vector/src/main/java/org/apache/drill/exec/vector/accessor/convert/AbstractWriteConverter.java
 ##########
 @@ -143,4 +144,9 @@ public void setTime(LocalTime value) {
   public void setTimestamp(Instant value) {
     baseWriter.setTimestamp(value);
   }
+
+  @Override
+  public void copy(ColumnReader from) {
+    throw new UnsupportedOperationException("Cannot copy values through a type 
converter");
 
 Review comment:
   If type converters shouldn't support copy then maybe makes sense to mark the 
method as final here. 

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