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https://issues.apache.org/jira/browse/HIVE-8756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14221121#comment-14221121
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Na Yang commented on HIVE-8756:
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Thank you @Xuefu for doing the code review!
> numRows and rawDataSize are not collected by the Spark stats [Spark Branch]
> ---------------------------------------------------------------------------
>
> Key: HIVE-8756
> URL: https://issues.apache.org/jira/browse/HIVE-8756
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Na Yang
> Assignee: Na Yang
> Attachments: HIVE-8756.1-spark.patch, HIVE-8756.2-spark.patch
>
>
> Run the following hive queries
> {noformat}
> set datanucleus.cache.collections=false;
> set hive.stats.autogather=true;
> set hive.merge.mapfiles=false;
> set hive.merge.mapredfiles=false;
> set hive.map.aggr=true;
> create table tmptable(key string, value string);
> INSERT OVERWRITE TABLE tmptable
> SELECT unionsrc.key, unionsrc.value
> FROM (SELECT 'tst1' AS key, cast(count(1) AS string) AS value FROM src s1
> UNION ALL
> SELECT s2.key AS key, s2.value AS value FROM src1 s2) unionsrc;
> DESCRIBE FORMATTED tmptable;
> {noformat}
> The hive on spark prints the following table parameters:
> {noformat}
> COLUMN_STATS_ACCURATE true
> numFiles 2
> numRows 0
> rawDataSize 0
> totalSize 225
> {noformat}
> The hive on mr prints the following table parameters:
> {noformat}
> able Parameters:
> COLUMN_STATS_ACCURATE true
> numFiles 2
> numRows 26
> rawDataSize 199
> totalSize 225
> {noformat}
> As above we can see the numRows and rawDataSize are not collected by hive on
> spark stats
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