November 2017
Beginner to intermediate
290 pages
7h 34m
English
book
Learning Apache Apex
by Ananth Gundabattula, Thomas Weise, Munagala V. Ramanath, David Yan, Kenneth Knowles
Content preview from Learning Apache Apex
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Calcite integration
For readers who are curious about how the integration with Calcite is implemented, we cover the relevant classes briefly in this section.
Calcite is a rather substantial project with a large and complex API, so in this short section we will merely touch upon its capabilities; the reader is encouraged to review the Calcite docs and source code to gain deeper insights into the API.
Here is a (very) high-level summary of how things work. After the desired custom functions and pseudo-tables are registered with the SQLExecEnvironment class (typically, in the populateDAG() method), the executeSQL() method is invoked to kick off all the hard work of parsing the SQL query, creating the necessary operators and adding them to the ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.