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## What changes were proposed in this pull request? This takes over original PR at #22019. The original proposal is to have null for float and double types. Later a more reasonable proposal is to disallow empty strings. This patch adds logic to throw exception when finding empty strings for non string types. ## How was this patch tested? Added test. Closes #22787 from viirya/SPARK-25040. Authored-by: Liang-Chi Hsieh <viirya@gmail.com> Signed-off-by: hyukjinkwon <gurwls223@apache.org> |
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