Github user yongtang commented on the pull request: https://github.com/apache/spark/pull/12128#issuecomment-205039361 Hi @yhuai @hvanhovell , as a reference, below is the result of the `describe function` for current master. I haven't been able to identify the corresponding functions: ``` spark-sql> describe function `!=`; Function: <> Class: org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPNotEqual Usage: a <> b - Returns TRUE if a is not equal to b ``` ``` spark-sql> describe function `<>`; Function: <> Class: org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPNotEqual Usage: a <> b - Returns TRUE if a is not equal to b ``` ``` spark-sql> describe function `between`; Function: between Class: org.apache.hadoop.hive.ql.udf.generic.GenericUDFBetween Usage: between a [NOT] BETWEEN b AND c - evaluate if a is [not] in between b and c ``` ``` spark-sql> describe function `case`; Function: case Class: org.apache.hadoop.hive.ql.udf.generic.GenericUDFCase Usage: CASE a WHEN b THEN c [WHEN d THEN e]* [ELSE f] END - When a = b, returns c; when a = d, return e; else return f ```
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