Chapter 3. The Impala Query Language and Built-in Functions

By now you will have a good idea of how Impala works and how different components interact with each other to support query requests. In the previous chapter we have learned how the Impala shell interacts with an Impala daemon running either on the same node or some other DataNode, and how users can use certain shell commands to perform their tasks through the Impala shell. Now in this chapter, we will learn how to make great use of the Impala shell to interact with data by using the Impala Query Language. Along with the Impala Query Language, we will also learn various Impala built-in functions along with great examples.

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