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SET @start_global_value = @@global.innodb_compression_algorithm;
SELECT @start_global_value;
@start_global_value
zlib
select @@global.innodb_compression_algorithm;
@@global.innodb_compression_algorithm
zlib
select @@session.innodb_compression_algorithm;
ERROR HY000: Variable 'innodb_compression_algorithm' is a GLOBAL variable
show global variables like 'innodb_compression_algorithm';
Variable_name Value
innodb_compression_algorithm zlib
show session variables like 'innodb_compression_algorithm';
Variable_name Value
innodb_compression_algorithm zlib
select * from information_schema.global_variables where variable_name='innodb_compression_algorithm';
VARIABLE_NAME VARIABLE_VALUE
INNODB_COMPRESSION_ALGORITHM zlib
select * from information_schema.session_variables where variable_name='innodb_compression_algorithm';
VARIABLE_NAME VARIABLE_VALUE
INNODB_COMPRESSION_ALGORITHM zlib
set global innodb_compression_algorithm=1;
select @@global.innodb_compression_algorithm;
@@global.innodb_compression_algorithm
zlib
select * from information_schema.global_variables where variable_name='innodb_compression_algorithm';
VARIABLE_NAME VARIABLE_VALUE
INNODB_COMPRESSION_ALGORITHM zlib
select * from information_schema.session_variables where variable_name='innodb_compression_algorithm';
VARIABLE_NAME VARIABLE_VALUE
INNODB_COMPRESSION_ALGORITHM zlib
set session innodb_compression_algorithm=0;
ERROR HY000: Variable 'innodb_compression_algorithm' is a GLOBAL variable and should be set with SET GLOBAL
set global innodb_compression_algorithm=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_compression_algorithm'
set global innodb_compression_algorithm=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_compression_algorithm'
set global innodb_compression_algorithm="foo";
ERROR 42000: Variable 'innodb_compression_algorithm' can't be set to the value of 'foo'
set global innodb_compression_algorithm=0;
select @@global.innodb_compression_algorithm;
@@global.innodb_compression_algorithm
none
SET @@global.innodb_compression_algorithm = @start_global_value;
SELECT @@global.innodb_compression_algorithm;
@@global.innodb_compression_algorithm
zlib
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