[jira] [Created] (SPARK-9592) First and Last aggregates are calculating the values for entire DataFrame partition not on GroupedData partition.

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

gaurav created SPARK-9592:
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             Summary: First and Last aggregates are calculating the values for entire DataFrame partition not on GroupedData partition.
                 Key: SPARK-9592
                 URL: https://issues.apache.org/jira/browse/SPARK-9592
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 1.4.0, 1.5.0
            Reporter: gaurav
            Priority: Minor
             Fix For: 1.5.0


In current implementation, First and Last aggregates were calculating the values for entire DataFrame partition and then the same value was returned for all GroupedData in the partition.
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
Fixed the First and Last aggregates should compute first and last value per GroupedData instead of entire DataFrame.



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