Zhenhua Wang ae83c21125 [SPARK-18998][SQL] Add a cbo conf to switch between default statistics and estimated statistics ... ## What changes were proposed in this pull request? We add a cbo configuration to switch between default stats and estimated stats. We also define a new statistics method `planStats` in LogicalPlan with conf as its parameter, in order to pass the cbo switch and other estimation related configurations in the future. `planStats` is used on the caller sides (i.e. in Optimizer and Strategies) to make transformation decisions based on stats. ## How was this patch tested? Add a test case using a dummy LogicalPlan. Author: Zhenhua Wang <wzh_zju@163.com> Closes #16401 from wzhfy/cboSwitch.		2017-01-03 12:19:52 +08:00
..
benchmarks	[SPARK-17335][SQL] Fix ArrayType and MapType CatalogString.	2016-09-03 19:02:20 +02:00
src	[SPARK-18998][SQL] Add a cbo conf to switch between default statistics and estimated statistics	2017-01-03 12:19:52 +08:00
pom.xml	[SPARK-17807][CORE] split test-tags into test-JAR	2016-12-21 16:37:20 -08:00