Reynold Xin 527fc5d0c9 [SPARK-20576][SQL] Support generic hint function in Dataset/DataFrame ... ## What changes were proposed in this pull request? We allow users to specify hints (currently only "broadcast" is supported) in SQL and DataFrame. However, while SQL has a standard hint format (/*+ ... */), DataFrame doesn't have one and sometimes users are confused that they can't find how to apply a broadcast hint. This ticket adds a generic hint function on DataFrame that allows using the same hint on DataFrames as well as SQL. As an example, after this patch, the following will apply a broadcast hint on a DataFrame using the new hint function: ``` df1.join(df2.hint("broadcast")) ``` ## How was this patch tested? Added a test case in DataFrameJoinSuite. Author: Reynold Xin <rxin@databricks.com> Closes #17839 from rxin/SPARK-20576.		2017-05-03 09:22:25 -07:00
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src	[SPARK-20576][SQL] Support generic hint function in Dataset/DataFrame	2017-05-03 09:22:25 -07:00
pom.xml	[SPARK-20453] Bump master branch version to 2.3.0-SNAPSHOT	2017-04-24 21:48:04 -07:00