viirya commented on issue #28160: [SPARK-30722][DOCS][FOLLOW-UP] Explicitly mention the same entire input/output length restriction of Series Iterator UDF URL: https://github.com/apache/spark/pull/28160#issuecomment-611363362 That said, it only requires that the length of entire output is the same of the entire input. But the number of Series and the length of output in each Series don't need to be the same as the input. Is it correct?
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