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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/12/15 01:44:58 UTC
[jira] [Commented] (SPARK-18870) Distinct aggregates give incorrect
answers on streaming dataframes
[ https://issues.apache.org/jira/browse/SPARK-18870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15750061#comment-15750061 ]
Apache Spark commented on SPARK-18870:
--------------------------------------
User 'tdas' has created a pull request for this issue:
https://github.com/apache/spark/pull/16289
> Distinct aggregates give incorrect answers on streaming dataframes
> ------------------------------------------------------------------
>
> Key: SPARK-18870
> URL: https://issues.apache.org/jira/browse/SPARK-18870
> Project: Spark
> Issue Type: Bug
> Components: Structured Streaming
> Affects Versions: 2.0.2
> Reporter: Tathagata Das
> Assignee: Tathagata Das
> Priority: Blocker
>
> Unsupported operations checking dont check whether AggregationExpression have isDistinct=true. So `streamingDf.groupBy().agg(countDistinct("key")) ` gives incorrect results.
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