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85cc6b70bd
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.
113 lines
3.7 KiB
Plaintext
113 lines
3.7 KiB
Plaintext
SET @start_global_value = @@global.old_alter_table;
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SELECT @start_global_value;
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@start_global_value
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DEFAULT
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select @@global.old_alter_table;
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@@global.old_alter_table
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DEFAULT
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select @@session.old_alter_table;
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@@session.old_alter_table
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DEFAULT
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show global variables like 'old_alter_table';
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Variable_name Value
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old_alter_table DEFAULT
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show session variables like 'old_alter_table';
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Variable_name Value
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old_alter_table DEFAULT
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select * from information_schema.global_variables where variable_name='old_alter_table';
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VARIABLE_NAME VARIABLE_VALUE
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OLD_ALTER_TABLE DEFAULT
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select * from information_schema.session_variables where variable_name='old_alter_table';
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VARIABLE_NAME VARIABLE_VALUE
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OLD_ALTER_TABLE DEFAULT
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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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@@global.old_alter_table
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COPY
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select @@session.old_alter_table;
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@@session.old_alter_table
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COPY
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show global variables like 'old_alter_table';
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Variable_name Value
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old_alter_table COPY
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show session variables like 'old_alter_table';
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Variable_name Value
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old_alter_table COPY
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select * from information_schema.global_variables where variable_name='old_alter_table';
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VARIABLE_NAME VARIABLE_VALUE
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OLD_ALTER_TABLE COPY
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select * from information_schema.session_variables where variable_name='old_alter_table';
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VARIABLE_NAME VARIABLE_VALUE
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OLD_ALTER_TABLE COPY
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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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@@global.old_alter_table
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INPLACE
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select @@session.old_alter_table;
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@@session.old_alter_table
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INPLACE
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show global variables like 'old_alter_table';
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Variable_name Value
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old_alter_table INPLACE
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show session variables like 'old_alter_table';
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Variable_name Value
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old_alter_table INPLACE
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select * from information_schema.global_variables where variable_name='old_alter_table';
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VARIABLE_NAME VARIABLE_VALUE
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OLD_ALTER_TABLE INPLACE
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select * from information_schema.session_variables where variable_name='old_alter_table';
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VARIABLE_NAME VARIABLE_VALUE
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OLD_ALTER_TABLE INPLACE
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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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@@global.old_alter_table
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NOCOPY
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select @@session.old_alter_table;
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@@session.old_alter_table
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NOCOPY
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show global variables like 'old_alter_table';
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Variable_name Value
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old_alter_table NOCOPY
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show session variables like 'old_alter_table';
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Variable_name Value
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old_alter_table NOCOPY
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select * from information_schema.global_variables where variable_name='old_alter_table';
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VARIABLE_NAME VARIABLE_VALUE
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OLD_ALTER_TABLE NOCOPY
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select * from information_schema.session_variables where variable_name='old_alter_table';
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VARIABLE_NAME VARIABLE_VALUE
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OLD_ALTER_TABLE NOCOPY
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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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@@global.old_alter_table
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INSTANT
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select @@session.old_alter_table;
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@@session.old_alter_table
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INSTANT
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show global variables like 'old_alter_table';
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Variable_name Value
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old_alter_table INSTANT
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show session variables like 'old_alter_table';
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Variable_name Value
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old_alter_table INSTANT
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select * from information_schema.global_variables where variable_name='old_alter_table';
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VARIABLE_NAME VARIABLE_VALUE
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OLD_ALTER_TABLE INSTANT
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select * from information_schema.session_variables where variable_name='old_alter_table';
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VARIABLE_NAME VARIABLE_VALUE
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OLD_ALTER_TABLE INSTANT
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set global old_alter_table=1.1;
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ERROR 42000: Incorrect argument type to variable 'old_alter_table'
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set global old_alter_table=1e1;
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ERROR 42000: Incorrect argument type to variable 'old_alter_table'
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set global old_alter_table="foo";
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ERROR 42000: Variable 'old_alter_table' can't be set to the value of '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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@@global.old_alter_table
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DEFAULT
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