[jira] [Created] (SPARK-9571) Improve expression function coverage (Spark 1.6)

["Reynold Xin (JIRA)" <ji...@apache.org>]

Reynold Xin created SPARK-9571:
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             Summary: Improve expression function coverage (Spark 1.6)
                 Key: SPARK-9571
                 URL: https://issues.apache.org/jira/browse/SPARK-9571
             Project: Spark
          Issue Type: Umbrella
          Components: SQL
            Reporter: Reynold Xin


This is an umbrella ticket to track new expressions we are adding to SQL/DataFrame in 1.6.

For each new expression, we should:
1. Add a new Expression implementation in org.apache.spark.sql.catalyst.expressions
2. If applicable, implement the code generated version (by implementing genCode).
3. Add comprehensive unit tests (for all the data types the expressions support).
4. If applicable, add a new function for DataFrame in org.apache.spark.sql.functions, and python/pyspark/sql/functions.py for Python.




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