[GitHub] [spark] mn-mikke commented on issue #21215: [SPARK-24148][SQL] Overloading array function to support typed empty arrays

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mn-mikke commented on issue #21215: [SPARK-24148][SQL] Overloading array function to support typed empty arrays
URL: https://github.com/apache/spark/pull/21215#issuecomment-483368852
 
 
   @srowen Yep, Map types suffer from the same problem. Users could eventually create a column of empty typed maps with using this function and ```map_from_arrays```, but having separate method would be better.
   
   This feature is definitely just nice to have since users can directly use ```Literal.create```. So I wouldn't mind if you wanted me to close the PR without merging. On the other hand, IMHO users shouldn't be forced to use call methods from ```org.apache.spark.sql.catalyst.expressions```. This doesn't sound like public API.

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