jhrotko commented on code in PR #892:
URL: https://github.com/apache/arrow-java/pull/892#discussion_r2514272480
##########
vector/src/main/codegen/templates/PromotableWriter.java:
##########
@@ -286,7 +286,7 @@ protected void setWriter(ValueVector v) {
writer = new UnionWriter((UnionVector) vector,
nullableStructWriterFactory);
break;
case EXTENSIONTYPE:
- writer = new UnionExtensionWriter((ExtensionTypeVector) vector);
+ writer = ((ExtensionType)
vector.getField().getType()).getNewFieldWriter(vector);
Review Comment:
It is necessary because `getNewFieldWriter()` is implemented in `MinorType`
and not `ArrowType`
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