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[SPARK-8176] [SPARK-8197] [SQL] function to_date/ trunc
This PR is based on #6988 , thanks to adrian-wang . This brings two SQL functions: to_date() and trunc(). Closes #6988 Author: Daoyuan Wang <daoyuan.wang@intel.com> Author: Davies Liu <davies@databricks.com> Closes #7805 from davies/to_date and squashes the following commits: 2c7beba [Davies Liu] Merge branch 'master' of github.com:apache/spark into to_date 310dd55 [Daoyuan Wang] remove dup test in rebase 980b092 [Daoyuan Wang] resolve rebase conflict a476c5a [Daoyuan Wang] address comments from davies d44ea5f [Daoyuan Wang] function to_date, trunc
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- python/pyspark/sql/functions.py 30 additions, 0 deletionspython/pyspark/sql/functions.py
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala 2 additions, 0 deletions...apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeFunctions.scala 87 additions, 1 deletion...he/spark/sql/catalyst/expressions/datetimeFunctions.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala 34 additions, 0 deletions...la/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/DateExpressionsSuite.scala 28 additions, 1 deletion...spark/sql/catalyst/expressions/DateExpressionsSuite.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/NonFoldableLiteral.scala 4 additions, 0 deletions...e/spark/sql/catalyst/expressions/NonFoldableLiteral.scala
- sql/core/src/main/scala/org/apache/spark/sql/functions.scala 16 additions, 0 deletionssql/core/src/main/scala/org/apache/spark/sql/functions.scala
- sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala 44 additions, 0 deletions.../test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
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