nbruno commented on a change in pull request #9151:
URL: https://github.com/apache/arrow/pull/9151#discussion_r565618713
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File path: java/vector/src/main/codegen/templates/UnionWriter.java
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@@ -110,6 +143,26 @@ public ListWriter asList() {
return getListWriter();
}
+ private MapWriter getMapWriter() {
+ // returns existing writer
+ Preconditions.checkNotNull(mapWriter);
Review comment:
I think this is another case of, we need keysSorted in order to create
the writer so we can't construct a new writer, but must rely on an existing one.
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