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.
