optimize combinehiveinputformat in presence of many partitions
--------------------------------------------------------------
Key: HIVE-1115
URL: https://issues.apache.org/jira/browse/HIVE-1115
Project: Hadoop Hive
Issue Type: Improvement
Components: Query Processor
Reporter: Namit Jain
A query like :
select .. from T where ...
where T contains a very large number of partitions does not work very well with
CombineHiveInputFomat.
A pool is created per directory, which leads to a high number of mappers.
In case all partitions share the same operator tree, and the same partition
description, only a single pool should be created.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
