Translation: SET clause (submitted to MARIADB official manual)

This article is the Official Handbook of MARIADB: Set translations.

Original:https://mariadb.com/kb/en/set/
I submit it to MARIADB official manual:https://mariadb.com/kb/zh-cn/set/

Grammar

SET variable_assignment [, variable_assignment] ...variable_assignment:      user_var_name = expr    | [GLOBAL | SESSION] system_var_name = expr    | [@@global. | @@session. | @@]system_var_name = expr

User variables can be set in any expression using the following syntax:

user_var_name:= expr

Describe

SETStatements can be assigned to different variable types that affect the service side or client. The old version of MySQL was used, but was deprecated with syntax and was SET OPTION OPTION SET removed in version 10.0 of MARIADB.

To assign a value to a variable based on each query (Per-query) (function starting after mariadb 10.1.2), see SET STATEMENT.

To view server-side system variables, see SHOW VARIABLES.

The Server system Variables lists all of the system variables.

Example

 SHOW VARIABLES WHERE variable_name  like "aria_group_commit%";+----------------------------+-------+| variable_name | Value |+----------------------------+-------+| Aria_group_commit | none | | Aria_group_commit_interval | 0 |+----------------------------+-------+ SET GLOBAL aria_group_commit="hard"; SET GLOBAL aria_group_commit_interval=; SHOW VARIABLES WHERE variable_name  like "aria_group_commit%";+----------------------------+-------+| variable_name | Value |+----------------------------+-------+| Aria_group_commit | Hard | | Aria_group_commit_interval | 100 |+----------------------------+-------+

Direct assignment:

SELECT (@a:=1);+---------+| (@a:=1) |+---------+|       1 |+---------+SELECT @a;+------+| @a   |+------+|    1 |+------+

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Translation: SET clause (submitted to MARIADB official manual)