[
https://issues.apache.org/jira/browse/HIVE-14035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Saket Saurabh updated HIVE-14035:
---------------------------------
Comment: was deleted
(was: Updated patch that accounts for recent changes and fixes few bugs for the
failed test cases.)
> Enable predicate pushdown to delta files created by ACID Transactions
> ---------------------------------------------------------------------
>
> Key: HIVE-14035
> URL: https://issues.apache.org/jira/browse/HIVE-14035
> Project: Hive
> Issue Type: New Feature
> Components: Transactions
> Reporter: Saket Saurabh
> Assignee: Saket Saurabh
> Attachments: HIVE-14035.patch
>
>
> In current Hive version, delta files created by ACID transactions do not
> allow predicate pushdown if they contain any update/delete events. This is
> done to preserve correctness when following a multi-version approach during
> event collapsing, where an update event overwrites an existing insert event.
> This JIRA proposes to split an update event into a combination of a delete
> event followed by a new insert event, that can enable predicate push down to
> all delta files without breaking correctness. To support backward
> compatibility for this feature, this JIRA also proposes to add some sort of
> versioning to ACID that can allow different versions of ACID transactions to
> co-exist together.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
