This commit is the first step in improving the performance of partition
pruning. Currently, Impala can prune approximately 10K partitions per
sec, thereby introducing significant overhead for huge table with a
large number of partitions. With this commit we reduce that overhead by
3X by batching the partition pruning calls to the backend.
Change-Id: I3303bfc7fb6fe014790f58a5263adeea94d0fe7d
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2608
Reviewed-by: Dimitris Tsirogiannis <dtsirogiannis@cloudera.com>
Tested-by: jenkins
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2687
ca86e470de