[
https://issues.apache.org/jira/browse/HIVE-17421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16156231#comment-16156231
]
Daniel Dai commented on HIVE-17421:
-----------------------------------
[~anishek], can you review?
> Clear incorrect stats after replication
> ---------------------------------------
>
> Key: HIVE-17421
> URL: https://issues.apache.org/jira/browse/HIVE-17421
> Project: Hive
> Issue Type: Bug
> Components: repl
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Attachments: HIVE-17421.1.patch, HIVE-17421.2.patch
>
>
> After replication, some stats summary are incorrect. If
> hive.compute.query.using.stats set to true, we will get wrong result on the
> destination side.
> This will not happen with bootstrap replication. This is because stats
> summary are in table properties and will be replicated to the destination.
> However, in incremental replication, this won't work. When creating table,
> the stats summary are empty (eg, numRows=0). Later when we insert data, stats
> summary are updated with
> update_table_column_statistics/update_partition_column_statistics, however,
> both events are not captured in incremental replication. Thus on the
> destination side, we will get count\(*\)=0. The simple solution is to remove
> COLUMN_STATS_ACCURATE property after incremental replication.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
