The invisible index is a special feature which will mark an index as unavailable for the optimizer. MySQL 8 will maintain invisible indexes and keep them up-to-date when data is modified. This will apply on indexes other than primary key. As we know, indexes are visible by default; we have to make them invisible explicitly at the time of creation, or by using the alter command. MySQL 8 provides the VISIBLE and INVISIBLE keywords to maintain index visibility. A descending index is the method of storing key values in descending order. A descending index is more efficient, as it can be scanned in the forward order. Let's see these indexes in detail, with examples.
MySQL 8 Administrator???s Guide
By :
MySQL 8 Administrator???s Guide
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Overview of this book
MySQL is one of the most popular and widely used relational databases in the world today. The recently released version 8.0 brings along some major advancements in the way your MySQL solution can be administered. This handbook will be your companion to understand the newly introduced features in MySQL and show you how you can leverage them to design a high-performance MySQL solution for your organization.
This book starts with a brief introduction to the new features in MySQL 8, and then quickly jumping onto the crucial administration topics that you will find useful in your day-to-day work. Topics such as migrating to MySQL 8, MySQL benchmarking, achieving high performance by implementing the indexing techniques, and optimizing your queries are covered in this book. You will also learn how to perform replication, scale your MySQL solution and implement effective security techniques. There is also a special section on the common and not so common troubleshooting techniques for effective MySQL administration is also covered in this book.
By the end of this highly practical book, you will have all the knowledge you need to tackle any problem you might encounter while administering your MySQL solution.
Table of Contents (17 chapters)
Preface
Free Chapter
An Introduction to MYSQL 8
Installing and Upgrading MySQL 8
MySQL 8 – Using Programs and Utilities
MySQL 8 Data Types
MySQL 8 Database Management
MySQL 8 Storage Engines
Indexing in MySQL 8
Replication in MySQL 8
Partitioning in MySQL 8
MySQL 8 – Scalability and High Availability
MySQL 8 – Security
Optimizing MySQL 8
Extending MySQL 8
MySQL 8 Best Practices and Benchmarking
Troubleshooting MySQL 8
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