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Posted to issues@spark.apache.org by "Yin Huai (JIRA)" <ji...@apache.org> on 2015/08/12 05:08:45 UTC
[jira] [Commented] (SPARK-9592) Last implemented based on
AggregateExpression1 are calculating the values for entire DataFrame
partition not on GroupedData partition.
[ https://issues.apache.org/jira/browse/SPARK-9592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14692830#comment-14692830 ]
Yin Huai commented on SPARK-9592:
---------------------------------
The last function based on AggregateExpression1 is broken. I am reopening it.
> Last implemented based on AggregateExpression1 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
> Reporter: gaurav
> Priority: Minor
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> 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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