Wenchen Fan dacc382f0c [SPARK-19887][SQL] dynamic partition keys can be null or empty string ... ## What changes were proposed in this pull request? When dynamic partition value is null or empty string, we should write the data to a directory like `a=__HIVE_DEFAULT_PARTITION__`, when we read the data back, we should respect this special directory name and treat it as null. This is the same behavior of impala, see https://issues.apache.org/jira/browse/IMPALA-252 ## How was this patch tested? new regression test Author: Wenchen Fan <wenchen@databricks.com> Closes #17277 from cloud-fan/partition.		2017-03-15 08:24:41 +08:00
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src	[SPARK-19887][SQL] dynamic partition keys can be null or empty string	2017-03-15 08:24:41 +08:00
pom.xml	[SPARK-17807][CORE] split test-tags into test-JAR	2016-12-21 16:37:20 -08:00