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[SPARK-11396] [SQL] add native implementation of datetime function to_unix_timestamp
`to_unix_timestamp` is the deterministic version of `unix_timestamp`, as it accepts at least one parameters. Since the behavior here is quite similar to `unix_timestamp`, I think the dataframe API is not necessary here. Author: Daoyuan Wang <daoyuan.wang@intel.com> Closes #9347 from adrian-wang/to_unix_timestamp.
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- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala 1 addition, 0 deletions...apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala 19 additions, 5 deletions.../spark/sql/catalyst/expressions/datetimeExpressions.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/DateExpressionsSuite.scala 36 additions, 0 deletions...spark/sql/catalyst/expressions/DateExpressionsSuite.scala
- sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala 21 additions, 0 deletions.../test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
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