GitHub user lianhuiwang opened a pull request: https://github.com/apache/spark/pull/18193
[SPARK-15616] [SQL] Metastore relation should fallback to HDFS size of partitions that are involved in Query for JoinSelection. ## What changes were proposed in this pull request? Currently if some partitions of a partitioned table are used in join operation we rely on Metastore returned size of table to calculate if we can convert the operation to Broadcast join. if Filter can prune some partitions, Hive can prune partition before determining to use broadcast joins according to HDFS size of partitions that are involved in Query.So sparkSQL needs it that can improve join's performance for partitioned table. ## How was this patch tested? add unit tests. You can merge this pull request into a Git repository by running: $ git pull https://github.com/lianhuiwang/spark partition_broadcast_2 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/18193.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #18193 ---- commit 5591a1c7623e4c668b257c940b5b2663f67acf51 Author: lianhuiwang <lianhuiwan...@gmail.com> Date: 2017-06-04T07:02:23Z init commit ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org