spark git commit: [SPARK-18465] Add 'IF EXISTS' clause to 'UNCACHE' to not throw exceptions when table doesn't exist

Repository: spark Updated Branches: refs/heads/master 702cd403f -> bdc8153e8 [SPARK-18465] Add 'IF EXISTS' clause to 'UNCACHE' to not throw exceptions when table doesn't exist ## What changes were proposed in this pull request? While this behavior is debatable, consider the following use cas

spark git commit: [SPARK-18465] Add 'IF EXISTS' clause to 'UNCACHE' to not throw exceptions when table doesn't exist

Repository: spark Updated Branches: refs/heads/branch-2.1 fa360134d -> fb2ea54a6 [SPARK-18465] Add 'IF EXISTS' clause to 'UNCACHE' to not throw exceptions when table doesn't exist ## What changes were proposed in this pull request? While this behavior is debatable, consider the following use