query HBase table from Hive

It is old news that you can query HBase from Hive. There are steps to do that listed here, here and here. What was news to me was that you can now query HBase and expose the row timestamp in Hive. This feature is included in 1.1.0 release of Apache Hive as part of this Jira. There’s more work to be done in exposing a cell’s timestamp and you can watch the progress of that as part of the following ticket, but for the sake of this post, I’d like to demo the first option.

Assuming you have a table in HBase called jsontable, with rowKey as string, column family called cf:json. The following gist shows the Hive create statement.

Once you create the table in Hive, you can query the table and view the row timestamp in Hive.

jdbc:hive2://localhost:10000> select time from hbase_json_table where key = 'dummyrow';
+--------------------------+--+
|           time           |
+--------------------------+--+
| 2015-11-09 19:06:26.155  |
+--------------------------+--+

1 row selected (2.573 seconds)



Comments

Post a Comment

Popular posts from this blog

Vista Vulnerability Report mentions Ubuntu 6.06 LTS

Update: I posted this on MIXX since DIGG was taken care of by someone already, except that that user didn't really write a good preview for it so it got buried. This report is generating some buzz though. I emailed this report to Mark Shuttleworth of Ubuntu fame and little did I know, HE ANSWERED!!!! Whoever answered me on that side of the e-mail pipe liked the report and was wondering if it was official and whether he could quote from it. It definitely is official and I forwarded him the e-mail with this report, he said he will pass it down internally. That made my day, it's amazing that a man of his statute, that's if it was him, answers e-mails from regular people like me. That's what I call a real genuine pioneer! Thank you Mark and all of the Ubuntu Staff. Read
Read more

Running CockroachDB with Docker Compose and Minio, Part 2

This is my second post on creating a multi-service architecture with docker-compose. This is meant to be a learning exercise and typically docker-compose is used to set up a local development environment rather than a production-ready set up. I regularly, find myself building these environments to reproduce customer bugs. For a production-specific application, refer to your platform vendor documentation. At some later time, I will cover Kubernetes deployments that can be used as a stepping stone for a real-world application. Until then, let's focus on the task at hand. We're building a microservice architecture with CockroachDB writing changes in real-time to an S3 bucket in JSON format. S3 bucket is served by a service called Minio. It can act like an S3 appliance on premise or serve as a local gateway to your cloud storage. Let's dig in:
Read more

Doing "print screen" on a Mac is a pain in the ass

I am catching up with blogging today and I need to take a screenshot of my screen. I have a Macbook Pro with Ubuntu in a virtual machine. There is no printscreen button and a quick search returned "Apple + Shift + 3". Mac fanboys think that's easy and better than PC? So here's a problem. If you want to take a print screen in VM, that key combination doesn't work. What do I do besides opening the screenshot application and doing it half-assed way? I am sure you can edit key bindings but that should not be that way. If you know of any other ways, let me know.
Read more