[jira] [Commented] (SPARK-12741) DataFrame count method return wrong size.

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

    [ https://issues.apache.org/jira/browse/SPARK-12741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15227688#comment-15227688 ] 

Stephane Maarek commented on SPARK-12741:
-----------------------------------------

Hi,

May be related to:
http://stackoverflow.com/questions/36438898/spark-dataframe-count-doesnt-return-the-same-results-when-run-twice 

I don't have code to generate the input file, it's just a simple hive table though.

Cheers,
Stephane

> DataFrame count method return wrong size.
> -----------------------------------------
>
>                 Key: SPARK-12741
>                 URL: https://issues.apache.org/jira/browse/SPARK-12741
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.5.0
>            Reporter: Sasi
>
> Hi,
> I'm updating my report.
> I'm working with Spark 1.5.2, (used to be 1.5.0), I have a DataFrame and I have 2 method, one for collect data and other for count.
> method doQuery looks like:
> {code}
> dataFrame.collect()
> {code}
> method doQueryCount looks like:
> {code}
> dataFrame.count()
> {code}
> I have few scenarios with few results:
> 1) Non data exists on my NoSQLDatabase results: count 0 and collect() 0
> 2) 3 rows exists results: count 0 and collect 3.
> 3) 5 rows exists results: count 2 and collect 5. 
> I tried to change the count code to the below code, but got the same results as I mentioned above.
> {code}
> dataFrame.sql("select count(*) from tbl").count/collect[0]
> {code}
> Thanks,
> Sasi



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