christianknoepfle

PR Proposal: dataframe.write.format("excel") supports SaveMode.Overwrite/Append and partitioning

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## Expected Behavior dataframe.write.format("excel") supports SaveMode.Overwrite/Append and partitioning in the same way as other data sources like csv ## Current Behavior SaveMode and partitioning doesn't work as expected, see issue...

Building assembly with 0.18 needs deduplicate

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### Is there an existing issue for this? - [X] I have searched the existing issues ### Current Behavior We have a "spark sdk" library, which utilizes the crealytics spark-excel...