Impala docs now included in CDH 5 library

With the release of CDH 5.0.0 and Impala 1.3.0, now for the first time the Impala docs are embedded alongside the CDH Installation Guide, Security Guide, and other CDH docs. This integration makes it easier to link back and forth both ways, and also will help readers find Impala-related content when they search within the CDH 5 library. Here's the full layout of the CDH 5.0.0 library. Notice

Impala Doc Reorg – January 2014

When Impala started, many of the early adopters were experts in HiveQL, so the Impala documentation assumed some familiarity with Hive SQL syntax and behavior. The Impala SQL reference info was relatively low-volume, more of a quick reference. Now there's more functionality to talk about, and more users are starting with Impala straight from an RDBMS background and need the full details from the

My history with Big Data

Before I joined Cloudera, I hadn't had much formal experience with Big Data. But I had crossed paths with one of its major use cases before, so I found it easy to pick up the mindset. My previous big project involved a relational database hooked up to a web server. (more...)

Documentation for Cloudera Impala 1.0

The Cloudera docs have been undergoing some reorganization lately. That applies double to the Impala documentation, which moved from beta to GA status and has been restructured at the same time. For posterity (and a little Googlerank mojo), here's the current layout of the Impala docs in mid-May 2013: Cloudera (more...)

You’ve Got to Fight for Your Invoker’s Rights

This post is about a PL/SQL feature that doesn't get enough respect, "invoker's rights".First off, what's its real name? Depending on the source, you'll see the feature name spelled "invoker's rights", "invokers' rights", or "invoker rights". That makes a difference -- you'll get different results in Google depending on what combination of singular, plural, and possessive you use. And to be

Oracle PeopleSoft hosted docs

Just in time for the new year! The Oracle PeopleSoft group now have their docs on Oracle.com in HTML format, hooked up to a Tahiti search:Oracle PeopleSoft Enterprise Hosted PeopleBooks

Coding Horror: Hardware is Cheap, Programmers are Expensive

You've probably heard both sides of this argument: throw hardware at performance problems, no no, improve the code. Jeff Atwood at Coding Horror comes down on the "more hardware" side in this post:Coding Horror: Hardware is Cheap, Programmers are ExpensiveUsually I agree with Jeff, but I

The Humble COUNT( ) Function

Here's another ode to a small but fundamental aspect of Oracle, following the same theme as The Humble IF Statement. This time, let's look at the COUNT( ) function. I think when you look at it the right way, it opens up the whole story about database performance.What's the first thing you do when poking around an unfamiliar system? I'll bet it involves SELECT COUNT(*) queries in one way or

Reformatting in vim

Things never really change. Even with XML, sometimes long lines are a big hassle. For example, if you have a wide code example that runs off the side of the page, and your formatter doesn't offer a way to adjust the page margins for one element, or to auto-shrink the font size.I was spoiled back in the day by the ability of editors like XEDIT to apply formats to ranges of lines, so I hadn't