spark git commit: [SPARK-23421][SPARK-22356][SQL] Document the behavior change in

Repository: spark Updated Branches: refs/heads/master 658d9d9d7 -> a77ebb092 [SPARK-23421][SPARK-22356][SQL] Document the behavior change in ## What changes were proposed in this pull request? https://github.com/apache/spark/pull/19579 introduces a behavior change. We need to document it in t

spark git commit: [SPARK-23421][SPARK-22356][SQL] Document the behavior change in

Repository: spark Updated Branches: refs/heads/branch-2.3 a5a8a86e2 -> bd83f7ba0 [SPARK-23421][SPARK-22356][SQL] Document the behavior change in ## What changes were proposed in this pull request? https://github.com/apache/spark/pull/19579 introduces a behavior change. We need to document it