nbruno commented on a change in pull request #9151:
URL: https://github.com/apache/arrow/pull/9151#discussion_r582505384
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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've updated the PR to assume `keysSorted = false` by default.
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