[jira] Commented: (HIVE-1361) table/partition level statistics

["Namit Jain (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-1361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12870240#action_12870240 ] 

Namit Jain commented on HIVE-1361:
----------------------------------

Can we further break them down to the stats which will be collected automatically at insert/load time vs. the stats which will be collected when the user explicitly analyzes the table ?

> table/partition level statistics
> --------------------------------
>
>                 Key: HIVE-1361
>                 URL: https://issues.apache.org/jira/browse/HIVE-1361
>             Project: Hadoop Hive
>          Issue Type: Sub-task
>    Affects Versions: 0.6.0
>            Reporter: Ning Zhang
>            Assignee: Ahmed M Aly
>             Fix For: 0.6.0
>
>
> At the first step, we gather table-level stats for non-partitioned table and partition-level stats for partitioned table. Future work could extend the table level stats to partitioned table as well. 
> There are 3 major milestones in this subtask: 
>  1) extend the insert statement to gather table/partition level stats on-the-fly.
>  2) extend metastore API to support storing and retrieving stats for a particular table/partition. 
>  3) add an ANALYZE TABLE [PARTITION] statement in Hive QL to gather stats for existing tables/partitions. 
> The proposed stats are:
> Partition-level stats: 
>   - number of rows
>   - total size in bytes
>   - number of files
>   - max, min, average row sizes
>   - max, min, average file sizes
> Table-level stats in addition to partition level stats:
>   - number of partitions

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.