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SET @start_value = @@GLOBAL.innodb_priority_purge;
SELECT @@GLOBAL.innodb_priority_purge;
@@GLOBAL.innodb_priority_purge
0
SELECT @@SESSION.innodb_priority_purge;
ERROR HY000: Variable 'innodb_priority_purge' is a GLOBAL variable
SET GLOBAL innodb_priority_purge='OFF';
SELECT @@GLOBAL.innodb_priority_purge;
@@GLOBAL.innodb_priority_purge
0
SET GLOBAL innodb_priority_purge='ON';
SELECT @@GLOBAL.innodb_priority_purge;
@@GLOBAL.innodb_priority_purge
1
SET GLOBAL innodb_priority_purge=0;
SELECT @@GLOBAL.innodb_priority_purge;
@@GLOBAL.innodb_priority_purge
0
SET GLOBAL innodb_priority_purge=1;
SELECT @@GLOBAL.innodb_priority_purge;
@@GLOBAL.innodb_priority_purge
1
SET GLOBAL innodb_priority_purge=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_priority_purge'
SET GLOBAL innodb_priority_purge=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_priority_purge'
SET GLOBAL innodb_priority_purge=2;
ERROR 42000: Variable 'innodb_priority_purge' can't be set to the value of '2'
SET GLOBAL innodb_priority_purge='foo';
ERROR 42000: Variable 'innodb_priority_purge' can't be set to the value of 'foo'
SET GLOBAL innodb_priority_purge = @start_value;
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