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From "Sushanth Sowmyan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9271) Add ability for client to request metastore to fire an event
Date Wed, 28 Jan 2015 00:57:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14294519#comment-14294519
] 

Sushanth Sowmyan commented on HIVE-9271:
----------------------------------------

No documentation needed here - this is not intended to be publicly visible and is hive internal
mechanics.

Basically, what's happening here is that some commands like INSERT might modify hive data
without changing any metadata - thus, we want to have a way for the client to tell the metastore
that it's making a change so there's a record of it in those cases for people checking the
metastore for changes, such as the in-development replication subsystem. So, this adds support
for the client to send us that information. HIVE-9273 will address actually making those changes
from the client side.

When the Replication system itself is done, there will be a documentation need for that, and
that will enumerate all the events it's acting on, and it will eventually be exposed through
there.

> Add ability for client to request metastore to fire an event
> ------------------------------------------------------------
>
>                 Key: HIVE-9271
>                 URL: https://issues.apache.org/jira/browse/HIVE-9271
>             Project: Hive
>          Issue Type: New Feature
>          Components: Metastore
>            Reporter: Alan Gates
>            Assignee: Alan Gates
>             Fix For: 0.15.0
>
>         Attachments: HIVE-9271.patch
>
>
> Currently all events in Hive are fired by the metastore.  However, there are events that
only the client fully understands, such as DML operations.  There should be a way for the
client to request the metastore to fire a particular event.



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