database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

MDEV-21921 Make transaction_isolation and transaction_read_only into system variables

Browse Source 
In MariaDB, we have a confusing problem where:
* The transaction_isolation option can be set in a configuration file, but it cannot be set dynamically.
* The tx_isolation system variable can be set dynamically, but it cannot be set in a configuration file.

Therefore, we have two different names for the same thing in different contexts. This is needlessly confusing, and it complicates the documentation. The same thing applys for transaction_read_only.

MySQL 5.7 solved this problem by making them into system variables. https://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-20.html

This commit takes a similar approach by adding new system variables and marking the original ones as deprecated. This commit also resolves some legacy problems related to SET STATEMENT and transaction_isolation.
This commit is contained in:
Junqi Xie
2023-03-12 13:55:30 +08:00
committed by Daniel Black
parent 4472a7b4ff
commit d20a96f9c1
100 changed files with 1232 additions and 962 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
mysql-test/main/backup_interaction.result
View File

@ -320,20 +320,20 @@ col1
HANDLER t1_myisam CLOSE;
BACKUP STAGE END;
drop table t1_innodb,t1_myisam;
# Show the fate and impact of some SET GLOBAL tx_read_only = 1/0
# Show the fate and impact of some SET GLOBAL transaction_read_only = 1/0
# sliding through the sequence.
BACKUP STAGE START;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
SET GLOBAL transaction_read_only = 1;
SET GLOBAL transaction_read_only = 0;
BACKUP STAGE FLUSH;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
SET GLOBAL transaction_read_only = 1;
SET GLOBAL transaction_read_only = 0;
BACKUP STAGE BLOCK_DDL;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
SET GLOBAL transaction_read_only = 1;
SET GLOBAL transaction_read_only = 0;
BACKUP STAGE BLOCK_COMMIT;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
SET GLOBAL transaction_read_only = 1;
SET GLOBAL transaction_read_only = 0;
BACKUP STAGE END;
# Show the fate and impact of some SET SESSION sql_log_bin = 0/1
# sliding through the sequence.