Reynold Xin 163e3f1df9 [SPARK-8241][SQL] string function: concat_ws. ... I also changed the semantics of concat w.r.t. null back to the same behavior as Hive. That is to say, concat now returns null if any input is null. Author: Reynold Xin <rxin@databricks.com> Closes #7504 from rxin/concat_ws and squashes the following commits: 83fd950 [Reynold Xin] Fixed type casting. 3ae85f7 [Reynold Xin] Write null better. cdc7be6 [Reynold Xin] Added code generation for pure string mode. a61c4e4 [Reynold Xin] Updated comments. 2d51406 [Reynold Xin] [SPARK-8241][SQL] string function: concat_ws.		2015-07-19 16:48:47 -07:00
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compatibility/src/test/scala/org/apache/spark/sql/hive/execution	[SPARK-8241][SQL] string function: concat_ws.	2015-07-19 16:48:47 -07:00
src	[SPARK-8638] [SQL] Window Function Performance Improvements - Cleanup	2015-07-19 16:29:50 -07:00
pom.xml	[SPARK-9015] [BUILD] Clean project import in scala ide	2015-07-16 18:42:41 +01:00