Hi, all I have some PRs blocked by hive upgrading (e.g. https://github.com/apache/spark/pull/2570), the problem is some internal hive method signature changed, it's hard to make the compatible in code level (sql/hive) when switching back/forth the Hive versions.
I guess the motivation of the upgrading is to support the Metastore with different Hive versions. So, how about just keep the metastore related hive jars upgrading or utilize the HCatalog directly? And of course we can either leaving hive-exec.jar hive-cli.jar etc as 0.12 or upgrade to 0.13.1, but not support them both. Sorry if I missed some discussion of Hive upgrading. Cheng Hao
