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b87ccfdfbc
Handle the 'set read_only=1' in lighter way, than the FLUSH TABLES READ LOCK;
For the transactional engines we don't wait for operations on that tables to finish.
per-file comments:
mysql-test/r/read_only_innodb.result
MDEV-136 Non-blocking "set read_only".
test result updated.
mysql-test/t/read_only_innodb.test
MDEV-136 Non-blocking "set read_only".
test case added.
sql/mysql_priv.h
MDEV-136 Non-blocking "set read_only".
The close_cached_tables_set_readonly() declared.
sql/set_var.cc
MDEV-136 Non-blocking "set read_only".
Call close_cached_tables_set_readonly() for the read_only::set_var.
sql/sql_base.cc
MDEV-136 Non-blocking "set read_only".
Parameters added to the close_cached_tables implementation,
close_cached_tables_set_readonly declared.
Prevent blocking on the transactional tables if the
set_readonly_mode is on.
70 lines
1.4 KiB
Text
70 lines
1.4 KiB
Text
DROP TABLE IF EXISTS table_11733 ;
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grant CREATE, SELECT, DROP on *.* to test@localhost;
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set global read_only=0;
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create table table_11733 (a int) engine=InnoDb;
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BEGIN;
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insert into table_11733 values(11733);
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set global read_only=1;
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select @@global.read_only;
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@@global.read_only
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1
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select * from table_11733 ;
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a
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11733
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COMMIT;
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ERROR HY000: The MySQL server is running with the --read-only option so it cannot execute this statement
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set global read_only=0;
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drop table table_11733 ;
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drop user test@localhost;
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GRANT CREATE, SELECT, DROP ON *.* TO test@localhost;
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CREATE TABLE t1(a INT) ENGINE=INNODB;
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INSERT INTO t1 VALUES (0), (1);
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SET GLOBAL read_only=1;
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SELECT * FROM t1;
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a
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0
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1
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BEGIN;
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SELECT * FROM t1;
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a
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0
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1
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COMMIT;
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SET GLOBAL read_only=0;
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FLUSH TABLES WITH READ LOCK;
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SELECT * FROM t1;
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a
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0
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1
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BEGIN;
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SELECT * FROM t1;
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a
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0
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1
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COMMIT;
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UNLOCK TABLES;
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FLUSH STATUS;
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# Expected 0 at the beginning of the test
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show status like 'Opened_tables';
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Variable_name Value
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Opened_tables 0
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connection con1;
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lock table t1 write;
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connection default;
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set global read_only=1;
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# Expected 1 as the slow_log was reopened
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show status like 'Opened_tables';
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Variable_name Value
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Opened_tables 1
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connection con1;
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unlock tables;
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connection default;
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SET GLOBAL read_only=0;
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# Expected 2 as the slow_log was reopened
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show status like 'Opened_tables';
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Variable_name Value
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Opened_tables 2
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UNLOCK TABLES;
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DROP TABLE t1;
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DROP USER test@localhost;
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echo End of 5.1 tests
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