November 2018
Beginner to intermediate
260 pages
6h 12m
English
Content preview from Apache Ignite Quick Start Guide
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SqlQuery
The SQLQuery API supports ANSI-99 SQL queries against caches. This API allows SQL joins against collocated entries on the same node as well as non-collocated distributed joins. In replicated mode, SQL joins are easy to execute as all entries are replicated in all cluster nodes, but for partitioned mode, a few nodes may not contain the primary backup, hence distributed joins become complex. Apache Ignite recommends to use affinity keys to store related entries together, so a player and their club must be collocated for faster distributed query processing.
Apache Ignite's @QuerySqlField annotation makes fields accessible for SQL queries. We can even index the fields for a faster query by setting the annotation value: @QuerySqlField(index=true) ...
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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.