HeartSaVioR commented on issue #27834: revert [SPARK-24640][SQL] Return `NULL` from `size(NULL)` by default URL: https://github.com/apache/spark/pull/27834#issuecomment-596161322 > As for the idea to have the size() behavior differ for aggregation vs. non-aggregation processing No I didn't mean it as an idea. I used it to describe the issue where NULL as result wouldn't have.
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