Impala Tutorials


Impala UDF (User-Defined Functions) – How to Write UDFs

1. Objective In this Impala Tutorial, we will learn the whole concept of Apache Impala UDF (User-Defined Functions). Apart from Impala UDF introduction, we will also learn, how to write Impala User-Defined Functions (UDFs) in detail. In addition, we will see limitations of Impala UDFs to prevent any error while using it. At last, we will cover some Impala UDF samples. So, let’s start Impala UDF (User-Defined Functions) 2. Impala User-Defined Functions (UDFs) In order to code our own application logic for […]

Impala UDF (User-Defined Functions) - How to Write UDFs

Impala SQL - Basics of Impala Query Language

Impala SQL – Basics of Impala Query Language

1. Objective In this Impala SQL Tutorial, we are going to study Impala Query Language Basics. It offers a high degree of compatibility with the Hive Query Language (HiveQL). However, there is much more to learn about Impala SQL, which we will explore, here. In addition, we will also discuss Impala Data-types. So, let’s start Impala SQL – Basic Introduction to Impala Query Langauge. 2. Impala SQL(Impala Query Language) While providing a great degree of compatibility with HiveQL, the Impala Query Language is also based on […]


Top 50 Impala Interview Questions and Answers

1. Impala Interview Questions In this tutorial on Impala Interview Questions, we have covered top 50 Impala Interview Questions and answers. Basically, we will provide you 50 Impala Interview Questions for best preparation. Also, these Impala Interview Questions includes deep aspects of Impala for freshers as well as for experienced professionals. These Impala Interview Questions will surely help you to sort out your every concept of Impala. 2. Top 50 Impala Interview Questions and Answers So, here, is the list […]

Impala Interview questions

Impala Installation: Steps to Install Impala on Linux

Impala Installation: Steps to Install Impala on Linux

1. Impala Installation In this Impala Tutorial, we will study “Impala Installation” procedure and also explains all the steps to install Impala on Linux. Since we know Impala is Hadoop’s sub-project and, it can only work on Linux operating system. Hence, we need to install Impala on Linux operating system. Since Cloudera shipped Impala, it is available with Cloudera Quickstart VM. So, for that, we will see how to download Cloudera Quickstart VM and start Impala. So, let’s start Impala […]


Impala Comments – 2 Types of Comments with Examples

1. Objective In Impala, when we need to specify what each query or a group of queries are, we use Several Impala Comments. So, in this article, we will introduce various Impala Comments. There are two types of Impala Comments. Such as Single line and Multiline. We will also learn about them in detail here. Moreover, we will see some examples, to understand it well. 2. Impala Comments Basically, we can say, Impala Comments are same as comments in SQL. Moreover, […]

Impala Comments - 2 Types of Comments with Examples

Impala ALTER VIEW Statement - How to Alter a View using Hue

Impala ALTER VIEW Statement – How to Alter a View

1. Objective In our last Impala Tutorial, we saw Create & Drop View Statements. Here, we are going to discuss Impala Alter View Statement. It helps to change the query associated with a view in Impala. Moreover, we will discuss the whole concept of  Impala ALTER VIEW from its introduction, syntax, type as well as its example, to understand it well. So, let’s start Impala Alter View Statements. 2. Impala ALTER VIEW Statement Impala ALTER VIEW Statement changes the query associated […]


Impala Security | Impala Security Guidelines 2018

1. Impala Security with Security Guidelines In our last tutorial, Impala SQL, and today we talk about Impala Security. We studied It is essential to learn about Impala Security while working on Impala.  Furthermore, we will discuss categories of security features. Also, we will learn Security Guidelines for Impala in detail. So, let’s start Impala Security Tutorial. 2. Introduction to Impala Security On the basis of Sentry open source project, Impala includes a fine-grained authorization framework for Hadoop. Basically, in […]

Impala Security

Impala troubleshooting & Performance Tuning

What is Impala Troubleshooting & Performance Tuning 1

1. Objective  While we know how to diagnose and debug problems in Impala, that is what we call Impala Troubleshooting-performance tuning methods. So, in this article, “Impala Troubleshooting-performance tuning” we will study several ways of diagnosing and debugging problems in Impala. So, let’s start Impala Troubleshooting / Known Issues. 2. Impala Troubleshooting & Performance Tuning Basically, being able to diagnose and debug problems in Impala, is what we call Impala Troubleshooting-performance tuning. It includes performance, network connectivity, out-of-memory conditions, disk space […]


Impala DISTINCT Operator – Syntax & Example

1. Objective In our previous tutorial, we studied Impala Offset Clause. Now, we are going to study Impala DISTINCT Operator. Although, there is much more to learn about using Impala DISTINCT Operator. So, let’s start Impala DISTINCT Operator. 2. Impala DISTINCT Operator While we want to filter the results or  to remove duplicates, we use The DISTINCT operator in a SELECT statement: — Returns the unique values from one column. — NULL is included in the set of values if any rows have […]

Impala DISTINCT Operator - Syntax & Example

Impala WITH Clause - A Quick Tour

Impala WITH Clause – A Quick Tour

1. Objective There are times when a query is way too complex. At that time using Impala WITH Clause, we can define aliases to complex parts and include them in the query. Although, there is much more to learn about using Impala WITH Clause. So, in this article, we will discuss the whole concept of  Impala WITH Clause. Apart from its introduction, it includes its syntax, type as well as its example, to understand it well. 2. Impala WITH Clause […]