Davies Liu e9533b419e [SPARK-13376] [SQL] improve column pruning ... ## What changes were proposed in this pull request? This PR mostly rewrite the ColumnPruning rule to support most of the SQL logical plans (except those for Dataset). ## How was the this patch tested? This is test by unit tests, also manually test with TPCDS Q78, which could prune all unused columns successfully, improved the performance by 78% (from 22s to 12s). Author: Davies Liu <davies@databricks.com> Closes #11256 from davies/fix_column_pruning.		2016-02-23 18:19:22 -08:00
..
src	[SPARK-13376] [SQL] improve column pruning	2016-02-23 18:19:22 -08:00
pom.xml	[SPARK-11565] Replace deprecated DigestUtils.shaHex call	2016-02-10 09:52:35 +00:00