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https://issues.apache.org/jira/browse/SPARK-8159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14583423#comment-14583423
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Jérémy Subtil commented on SPARK-8159:
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I'd be interested by {{collect_set}} and {{collect_list}} listed in SPARK-7285.
Can we create the related issues?
> Improve SQL/DataFrame expression coverage
> -----------------------------------------
>
> Key: SPARK-8159
> URL: https://issues.apache.org/jira/browse/SPARK-8159
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Reynold Xin
>
> This is an umbrella ticket to track new expressions we are adding to
> SQL/DataFrame.
> 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.
> For date/time functions, put them in expressions/datetime.scala, and create a
> DateTimeFunctionSuite.scala for testing.
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