[GitHub] [spark] gengliangwang commented on issue #26324: [SPARK-29462] The data type of "array()" should be array

[GitBox <gi...@apache.org>]

gengliangwang commented on issue #26324: [SPARK-29462] The data type of "array()" should be array<null>
URL: https://github.com/apache/spark/pull/26324#issuecomment-547999191
 
 
   I think the proposal is reasonable.
   After https://github.com/apache/spark/pull/26107, we can't store string type into numeric type without explicit casting. 
   So, if we want to insert an empty array into a column of `array<int>`, simply using value `array()` will fail the analysis check. 
   Since Spark can insert null type to other types, the problem is resolved.

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