Mithun Radhakrishnan created HIVE-11548:
-------------------------------------------
Summary: HCatLoader should support predicate pushdown.
Key: HIVE-11548
URL: https://issues.apache.org/jira/browse/HIVE-11548
Project: Hive
Issue Type: New Feature
Components: HCatalog
Reporter: Mithun Radhakrishnan
Assignee: Mithun Radhakrishnan
When one uses {{HCatInputFormat}}/{{HCatLoader}} to read from file-formats that
support predicate pushdown (such as ORC, with
{{hive.optimize.index.filter=true}}), one sees that the predicates aren't
actually pushed down into the storage layer.
The forthcoming patch should allow for filter-pushdown, if any of the
partitions being scanned with {{HCatLoader}} support the functionality. The
patch should technically allow the same for users of {{HCatInputFormat}}, but I
don't currently have a neat interface to build a compound predicate-expression.
Will add this separately, if required.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
