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Introduced new alter algorithm type called NOCOPY & INSTANT for inplace alter operation. NOCOPY - Algorithm refuses any alter operation that would rebuild the clustered index. It is a subset of INPLACE algorithm. INSTANT - Algorithm allow any alter operation that would modify only meta data. It is a subset of NOCOPY algorithm. Introduce new variable called alter_algorithm. The values are DEFAULT(0), COPY(1), INPLACE(2), NOCOPY(3), INSTANT(4) Message to deprecate old_alter_table variable and make it alias for alter_algorithm variable. alter_algorithm variable for slave is always set to default.
69 lines
2.4 KiB
Plaintext
69 lines
2.4 KiB
Plaintext
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#
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# 2010-01-20 OBN - added check of I_S values after variable value changed
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#
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SET @start_global_value = @@global.old_alter_table;
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SELECT @start_global_value;
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#
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# exists as global and session
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#
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select @@global.old_alter_table;
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select @@session.old_alter_table;
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show global variables like 'old_alter_table';
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show session variables like 'old_alter_table';
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select * from information_schema.global_variables where variable_name='old_alter_table';
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select * from information_schema.session_variables where variable_name='old_alter_table';
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#
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# show that it's writable
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#
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set global old_alter_table=1;
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set session old_alter_table=1;
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select @@global.old_alter_table;
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select @@session.old_alter_table;
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show global variables like 'old_alter_table';
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show session variables like 'old_alter_table';
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select * from information_schema.global_variables where variable_name='old_alter_table';
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select * from information_schema.session_variables where variable_name='old_alter_table';
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set global old_alter_table=2;
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set session old_alter_table=2;
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select @@global.old_alter_table;
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select @@session.old_alter_table;
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show global variables like 'old_alter_table';
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show session variables like 'old_alter_table';
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select * from information_schema.global_variables where variable_name='old_alter_table';
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select * from information_schema.session_variables where variable_name='old_alter_table';
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set global old_alter_table=3;
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set session old_alter_table=3;
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select @@global.old_alter_table;
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select @@session.old_alter_table;
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show global variables like 'old_alter_table';
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show session variables like 'old_alter_table';
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select * from information_schema.global_variables where variable_name='old_alter_table';
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select * from information_schema.session_variables where variable_name='old_alter_table';
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set global old_alter_table=4;
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set session old_alter_table=4;
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select @@global.old_alter_table;
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select @@session.old_alter_table;
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show global variables like 'old_alter_table';
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show session variables like 'old_alter_table';
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select * from information_schema.global_variables where variable_name='old_alter_table';
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select * from information_schema.session_variables where variable_name='old_alter_table';
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#
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# incorrect types
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#
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--error ER_WRONG_TYPE_FOR_VAR
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set global old_alter_table=1.1;
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--error ER_WRONG_TYPE_FOR_VAR
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set global old_alter_table=1e1;
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--error ER_WRONG_VALUE_FOR_VAR
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set global old_alter_table="foo";
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SET @@global.old_alter_table = @start_global_value;
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SELECT @@global.old_alter_table;
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