MySQL 8.0.16 New Features Summary

MySQL 8.0.16
New Features Summary
Olivier DASINI
MySQL Principal Solutions Architect
Blog: http://dasini.net/blog/en/
Twitter: @freshdaz

http://dasini.net/blog/en/
Me, Myself & I
➢
MySQL Geek
✔ Addicted to MySQL for 15+ years!
✔ Playing with databases for 20+ years
➢
MySQL Writer, Blogger and Speaker
✔ Also former : DBA, Consultant, Architect, Trainer, ...
➢
MySQL Principal Solutions Architect EMEA at Oracle
➢
Stay tuned! :
✔ Twitter : @freshdaz
✔ Blog : http://dasini.net/blog
Olivier DASINI

The following is just a summary of the MySQL 8.0.16 new features.
For a more thorough and exhaustive view please read the following contents :
➢
The MySQL 8.0.16 Maintenance Release is Generally Available
✔ https://mysqlserverteam.com/the-mysql-8-0-16-maintenance-release-is-generally-available/
➢
Changes in MySQL 8.0.16 (2019-04-25, General Availability)
✔ https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-16.html
➢
Changes in MySQL Shell 8.0.16 (2019-04-25, General Availability)
✔ https://dev.mysql.com/doc/relnotes/mysql-shell/8.0/en/news-8-0-16.html
➢
Changes in MySQL Router 8.0.16 (2019-04-25, General Availability)
✔ https://dev.mysql.com/doc/relnotes/mysql-router/en/news-8-0-16.html
And also the MySQL team Blogs :
➢
https://mysqlserverteam.com/
➢
https://mysqlhighavailability.com/
➢
https://mysqlrelease.com/
➢
http://insidemysql.com/
Disclaimer

The world's most popular open source database

Highlights
➢
mysql_upgrade is no longer necessary
➢
CHECK Constraints
➢
Constant-Folding Optimization
➢
SYSTEM_USER & partial_revokes
➢
Chinese collation for utf8mb4
➢
Performance Schema keyring_keys table
➢
MySQL Shell Enhancements
➢
MySQL Router Enhancements
➢
InnoDB Cluster Enhancements
➢
Group Replication Enhancements
➢
Size of the binary tarball for Linux
➢
Server quick settings validation
5

mysql_upgrade
is no longer necessary

mysql_upgrade is going away
➢
Move actions from mysql_upgrade client into mysqld
✔ MySQL will upgrade itself
➢
The mysql_upgrade is deprecated
✔ It will be removed in a future MySQL version
7
Resources
➢
MySQL 8.0.16: mysql_upgrade is going away
✔ https://mysqlserverteam.com/mysql-8-0-16-mysql_upgrade-is-going-away/
➢
WL#12413 - Move actions from mysql_upgrade client into mysqld
✔ https://dev.mysql.com/worklog/task/?id=12413

CHECK Constraints

CHECK Constraints 1/2
➢
CHECK constraint is a type of integrity constraint in SQL
➢
It specifies a search condition to check the value being entered into a row
➢
The constraint is violated if the result of a search condition is FALSE for
any row of the table
9
mysql>
CREATE TABLE checker (
i tinyint,
CONSTRAINT i_must_be_between_7_and_12 CHECK (i BETWEEN 7 AND 12 )
);
mysql>
INSERT INTO checker (i) VALUES (13);
ERROR 3819 (HY000): Check constraint 'i_must_be_between_7_and_12' is violated.

CHECK Constraints 2/2
10
Resources
➢
CHECK Constraints
✔ https://dev.mysql.com/doc/refman/8.0/en/create-table-check-constraints.html
➢
WL#929 – CHECK constraints
➢
MySQL 8.0.16 Introducing CHECK constraint
✔ https://mysqlserverteam.com/mysql-8-0-16-introducing-check-constraint/
➢
CHECK constraints in MySQL
✔ http://dasini.net/blog/2019/05/14/check-constraints-in-mysql/
➢
MySQL 8.0.16 Check Constraints
✔ https://elephantdolphin.blogspot.com/2019/04/mysql-8016-check-constraints.html
➢
MySQL 8.0.16: how to validate JSON values in NoSQL with check constraint
✔ https://lefred.be/content/mysql-8-0-16-how-to-validate-json-values-in-nosql-with-check-constraint/

➢
Comparisons of columns of numeric types with constant
values are checked and folded or removed for invalid or
out-of-rage values
➢
The goal is to speed up execution at the cost of a little
more analysis at optimize time
12
Resources
➢
Constant-Folding Optimization in MySQL 8.0
✔ http://dasini.net/blog/2019/05/07/constant-folding-optimization-in-mysql-8-0/
➢
WL#11935 – Add folding of constants when compared to fields

SYSTEM_USER & partial_revokes

SYSTEM_USER & partial_revokes 1/2
➢
SYSTEM_USER -> Power users
✔ Concept of user account categories, with system and regular users
distinguished according to whether they have the new SYSTEM_USER
privilege
➢
partial_revokes -> Simplifies the administration of privileges
✔ Makes it possible to revoke privileges partially
14
mysql>
SET PERSIST partial_revokes = ON; -- Enable partial_revokes
GRANT SELECT, INSERT ON *.* TO u1;
REVOKE INSERT ON world.* FROM u1;

SYSTEM_USER & partial_revokes 2/2
15
Resources
➢
SYSTEM_USER
✔ https://dev.mysql.com/doc/refman/8.0/en/privileges-provided.html#priv_system-user
➢
partial_revokes
✔ https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_partial_revokes
➢
Privilege Restriction Using Partial Revokes
✔ https://dev.mysql.com/doc/refman/8.0/en/partial-revokes.html
➢
The SYSTEM_USER Dynamic Privilege
✔ https://mysqlserverteam.com/the-system_user-dynamic-privilege/
➢
Partial Revokes from Database Objects
✔ https://mysqlserverteam.com/partial-revokes-from-database-objects/
➢
How to create multiple accounts for an app?
✔ https://mysqlserverteam.com/how-to-create-multiple-accounts-for-an-app/
➢
WL#12098 – MySQL system users

➢
New Chinese collation supported
➢
Named : utf8mb4_zh_0900_as_cs
✔ utf8mb4 is the character set
✔ zh is the ISO code for Chinese
✔ 0900 means this collation follows the Unicode standard 9.0
✔ as_cs means accent sensitive and case sensitive
➢
Its characteristics are similar to utf8mb4_0900_as_cs except that
language-specific rules take precedence where applicable
17
Resources
➢
WL#11825 – Add Chinese collation for utf8mb4

Performance Schema
keyring_keys table

Performance Schema keyring_keys table
➢
performance_schema.keyring_keys table exposes metadata for keys in the
MySQL Keyring
➢
It does not expose any sensitive keyring data such as key contents.
19
mysql> SELECT * FROM performance_schema.keyring_keys;
+--------------------------------------------------+-----------+----------------+
| KEY_ID | KEY_OWNER | BACKEND_KEY_ID |
+--------------------------------------------------+-----------+----------------+
| INNODBKey-00008013-0000-0000-0000-000000008013-1 | | |
| audit_log | | |
+--------------------------------------------------+-----------+----------------+
Resources
➢
The keyring_keys table
✔ https://dev.mysql.com/doc/refman/8.0/en/keyring-keys-table.html
➢
WL#11543 – instrument the keyring into performance schema

MySQL Shell Enhancements

MySQL Shell Enhancements 1/2
Shell Reporting Framework
➢
Shell commands have been added to enable monitoring through the usage
of user-defined reports
✔ The show shell command enables displaying a previously registered report
✔ The watch shell command enables displaying a report using a refresh interval
Executing SQL in JavaScript and Python modes
➢
The sql shell command can now receive an optional SQL statement
✔ No switch to the SQL mode will be performed
✔ The SQL statement will be executed using the global session
✔ Its result will be displayed right away
21

MySQL Shell Enhancements 2/2
22
Resources
➢
MySQL Shell 8.0.16 – What’s New?
✔ https://mysqlserverteam.com/mysql-shell-8-0-16-whats-new/
➢
Reporting with MySQL Shell
✔ https://dev.mysql.com/doc/mysql-shell/8.0/en/mysql-shell-reporting.html
➢
MySQL Shell 8.0.16: Built-in Reports
✔ https://mysql.wisborg.dk/2019/04/26/mysql-shell-8-0-16-built-in-reports/
➢
MySQL Shell 8.0.16: User Defined Reports
✔ https://mysql.wisborg.dk/2019/04/27/mysql-shell-8-0-16-user-defined-reports/
➢
Using the new MySQL Shell Reporting Framework to monitor InnoDB Cluster
✔ https://lefred.be/content/using-the-new-mysql-shell-reporting-framework-to-monitor-innodb-cluster/

➢
HTTP server plugin
✔ Allow Router to expose REST endpoints and a web-interface
━
Foundation for features like healthcheck, monitoring and management
✔ Support TLS/HTTPS and basic authentication against a secure, file based password
storage
24
Resources
➢
MySQL Router 8.0.16: What’s new
✔ https://mysqlserverteam.com/mysql-router-8-0-16-whats-new/
➢
WL#11891 – HTTP component to MySQL Router
➢
WL#12524 – TLS for HTTP Component
➢
WL#12503 – Authentication for HTTP component

➢
Information about the MySQL Server version
✔ status() now provides information about the MySQL version running on each cluster
members in a new attribute named version
✔ rescan() now provides information about the MySQL version of an instance which was
found to be part of the cluster but not managed by the AdminAPI
➢
Defining auto-rejoin for cluster members
✔ Configure a number of automatic rejoins to avoid undesired member expels
✔ Useful w/ slow/flaky networks or with a high rate of transient failure
✔ Commands that have been extended with the new option: autorejoinRetries
━
createCluster() / addInstance() / setOption() / setInstanceOption()
26
Resources
➢
MySQL InnoDB Cluster – What’s new in the 8.0.16 release
✔ https://mysqlserverteam.com/mysql-innodb-cluster-whats-new-in-the-8-0-16-release/

Group Replication Enhancements

Group Replication Enhancements 1/2
Quick Summary
➢
Large Messages Fragmentation Layer for Group Replication
➢
Tunable Paxos Message Cache for Group Replication
➢
Auto-rejoin for Group Replication
➢
SQL command for Binary Log Encryption Key Rotation
➢
Partition metadata into the Binary Log
➢
group_replication_exit_state_action defaults to READ_ONLY
28

Group Replication Enhancements 2/2
29
Resources
➢
MySQL 8.0.16 Replication Enhancements
✔ https://mysqlhighavailability.com/mysql-8-0-16-replication-enhancements/
➢
Rotating binary log master key online
✔ https://mysqlhighavailability.com/rotating-binary-log-master-key-online/
➢
Change group_replication_exit_state_action default option to READ_ONLY
✔ https://mysqlhighavailability.com/change-group_replication_exit_state_action-default-option-to-read_only/
➢
Enhanced support for large transactions in Group Replication
✔ https://mysqlhighavailability.com/enhanced-support-for-large-transactions-in-group-replication/
➢
No Ping Will Tear Us Apart – Enabling member auto-rejoin in Group Replication
✔ https://mysqlhighavailability.com/no-ping-will-tear-us-apart-enabling-member-auto-rejoin-in-group-replication/

➢
Introduction of a new, “minimal” type of tarball
✔ Removed the debug binaries and stripped all the regular binaries
➢
Whopping 90% off the regular tarball size
✔ Going from 439.4Mb down to 42.2Mb
✔ Including the compression change, the total reduction is around 93%
31
Resources
➢
The Amazing Shrinking Tarball
✔ https://mysqlrelease.com/2019/05/the-amazing-shrinking-tarball/

Server quick settings validation

Server quick settings validation 1/2
➢
--validate-config : enable the startup configuration to be checked for
problems without running the server in normal operational mode
✔ If no errors are found, the server terminates with an exit code of 0
✔ If an error is found, the server displays a diagnostic message and terminates with an
exit code of 1
➢
Particularly useful after an upgrade
✔ Check whether any options previously used with the older server are considered by the
upgraded server to be deprecated or obsolete
33
$ ./mysqld --defaults-file=./my.cnf --validate-config --log_error_verbosity=2
2019-05-15T09:56:48.026519Z 0 [Warning] [MY-011068] [Server] The syntax 'expire-logs-days' is deprecated
and will be removed in a future release. Please use binlog_expire_logs_seconds instead.
2019-05-15T09:56:48.027064Z 0 [Warning] [MY-010101] [Server] Insecure configuration for --secure-file-
priv: Location is accessible to all OS users. Consider choosing a different directory.
2019-05-15T09:56:48.037113Z 0 [ERROR] [MY-000067] [Server] unknown variable 'log-eror=msandbox.err'.
2019-05-15T09:56:48.037189Z 0 [ERROR] [MY-010119] [Server] Aborting

Server quick settings validation 2/2
34
Resources
➢
Server Configuration Validation
✔ https://dev.mysql.com/doc/refman/8.0/en/server-configuration-validation.html
➢
validate-config
✔ https://dev.mysql.com/doc/refman/8.0/en/server-options.html#option_mysqld_validate-config
➢
WL#12360 – Add an option to allow server quick settings validation

Thanks for the Contributions

Thanks for the Contributions
Facebook
Daniel Black
Yuhui Wang
Wei Zhao
Yan Huang
Dirkjan Bussink
36
Details
➢
MySQL Server 8.0.16 Thanks for the Contributions
✔ https://mysql.wisborg.dk/2019/05/01/mysql-server-8-0-16-thanks-for-the-contributions/

The complete list of new features in MySQL 8.0
37
There are over 250 new features in MySQL 8.0...
https://mysqlserverteam.com/the-complete-list-of-new-features-in-mysql-8-0/

Thanks for using !

MySQL 8.0.16 New Features Summary

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