dongjoon-hyun edited a comment on issue #27834: revert [SPARK-24640][SQL] Return `NULL` from `size(NULL)` by default URL: https://github.com/apache/spark/pull/27834#issuecomment-595901992 I prefer the AS-IS status of 3.0, but this seems to fall into the same category where @marmbrus and @gatorsmile asked reverting on the behavior fix at two-parameter `TRIM` function. Technically, two-parameter `TRIM` was a correctness fix. However, we reverted that by preserving the old behavior because two-parameter `TRIM` was not a SQL standard.
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