GitHub user amrk7s opened a pull request:
https://github.com/apache/hive/pull/284
HIVE-18338 Exposing asynchronous execution through hive-jdbc client
**Problem statement**
Hive JDBC currently exposes 2 methods related to asynchronous execution
**executeAsync()** - to trigger a query execution and return immediately.
**waitForOperationToComplete()** - which waits till the current execution
is complete **blocking the user thread**.
This has one problem
- If the client process goes down, there is no way to resume queries
although hive server is completely asynchronous.
**Proposal**
If operation handle could be exposed, we can latch on to an active
execution of a query.
**Code changes**
Operation handle is exposed. So client can keep a copy.
latchSync() and latchAsync() methods take an operation handle and try to
latch on to the current execution in hive server if present
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/Flipkart/hive async_jdbc
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/hive/pull/284.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #284
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commit 9afa0ae9a9e2c38be3fbdadab230fdd399ab8e5b
Author: amrk7s <amruth.s@...>
Date: 2017-12-25T13:20:22Z
HIVE-18338 Exposing asynchronous execution through hive-jdbc client
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