Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/18958#discussion_r134147099 --- Diff: sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/ColumnarBatch.java --- @@ -307,64 +293,70 @@ public void update(int ordinal, Object value) { @Override public void setNullAt(int ordinal) { --- End diff -- one question, does the rows returned by `ColumnarBatch.rowIterator` have to be mutable?
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