Book Image

Apache Hive Cookbook

Book Image

Apache Hive Cookbook

Overview of this book

Hive was developed by Facebook and later open sourced in Apache community. Hive provides SQL like interface to run queries on Big Data frameworks. Hive provides SQL like syntax also called as HiveQL that includes all SQL capabilities like analytical functions which are the need of the hour in today’s Big Data world. This book provides you easy installation steps with different types of metastores supported by Hive. This book has simple and easy to learn recipes for configuring Hive clients and services. You would also learn different Hive optimizations including Partitions and Bucketing. The book also covers the source code explanation of latest Hive version. Hive Query Language is being used by other frameworks including spark. Towards the end you will cover integration of Hive with these frameworks.
Table of Contents (19 chapters)
Apache Hive Cookbook
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Index

Dropping views


In this recipe, you will learn how to drop a view in Hive.

Getting ready

The DROP VIEW command removes the view from the database. It removes the metadata, but the base table remains intact. If a base table is a view that is dropped, then the dependent view remains in an invalid state, which is either dropped or recreated. The general syntax for dropping a view is as follows:

DROP VIEW [IF EXISTS] view_name;

Where:

[IF EXISTS]: Is an optional clause. If there is an attempt to drop a view that does not exist, an error is thrown. To prevent this error, the IF EXISTS clause is specified.

How to do it…

The following statement drops a view in Hive:

Drop view Hive_view;