nbruno commented on a change in pull request #9151:
URL: https://github.com/apache/arrow/pull/9151#discussion_r582506810
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File path: java/vector/src/test/java/org/apache/arrow/vector/TestMapVector.java
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@@ -624,6 +625,423 @@ public void testMapWithListValue() throws Exception {
}
}
+ @Test
+ public void testMapWithMapValue() throws Exception {
+ try (MapVector mapVector = MapVector.empty("sourceVector", allocator,
false)) {
+
+ UnionMapWriter mapWriter = mapVector.getWriter();
+ MapWriter valueWriter;
+
+ // we are essentially writing Map<Long, Map<Long, Long>>
Review comment:
I added a comment showing the resulting Map that the code is creating. I
tried to pick a syntax that was both concise yet clear, however it gets
challenging as the data type gets more complex.
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