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f549f495f7
Renamed the system variable optimizer_use_stat_tables to use_stat_tables. This variable now has only 3 possible values: 'never', 'complementary', 'preferably'. If the server has been launched with --use-stat-tables='complementary'|'preferably' then the statictics tables can be employed by the optimizer and by the ANALYZE command.
96 lines
3.0 KiB
Plaintext
96 lines
3.0 KiB
Plaintext
SET @start_global_value = @@global.use_stat_tables;
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SELECT @start_global_value;
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@start_global_value
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NEVER
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SET @start_session_value = @@session.use_stat_tables;
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SELECT @start_session_value;
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@start_session_value
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NEVER
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SET @@global.use_stat_tables = 2;
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SET @@global.use_stat_tables = DEFAULT;
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SELECT @@global.use_stat_tables;
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@@global.use_stat_tables
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NEVER
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SET @@global.use_stat_tables = 0;
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SELECT @@global.use_stat_tables;
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@@global.use_stat_tables
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NEVER
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SET @@global.use_stat_tables = 1;
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SELECT @@global.use_stat_tables;
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@@global.use_stat_tables
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COMPLEMENTARY
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SET @@global.use_stat_tables = 2;
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SELECT @@global.use_stat_tables;
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@@global.use_stat_tables
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PREFERABLY
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SET @@global.use_stat_tables = NEVER;
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SELECT @@global.use_stat_tables;
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@@global.use_stat_tables
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NEVER
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SET @@global.use_stat_tables = COMPLEMENTARY;
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SELECT @@global.use_stat_tables;
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@@global.use_stat_tables
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COMPLEMENTARY
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SET @@global.use_stat_tables = PREFERABLY;
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SELECT @@global.use_stat_tables;
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@@global.use_stat_tables
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PREFERABLY
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SET @@session.use_stat_tables = 0;
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SELECT @@session.use_stat_tables;
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@@session.use_stat_tables
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NEVER
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SET @@session.use_stat_tables = 1;
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SELECT @@session.use_stat_tables;
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@@session.use_stat_tables
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COMPLEMENTARY
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SET @@session.use_stat_tables = 2;
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SELECT @@session.use_stat_tables;
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@@session.use_stat_tables
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PREFERABLY
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SET @@session.use_stat_tables = NEVER;
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SELECT @@session.use_stat_tables;
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@@session.use_stat_tables
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NEVER
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SET @@session.use_stat_tables = PREFERABLY;
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SELECT @@session.use_stat_tables;
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@@session.use_stat_tables
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PREFERABLY
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SET @@session.use_stat_tables = COMPLEMENTARY;
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SELECT @@session.use_stat_tables;
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@@session.use_stat_tables
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COMPLEMENTARY
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set sql_mode=TRADITIONAL;
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SET @@global.use_stat_tables = 10;
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ERROR 42000: Variable 'use_stat_tables' can't be set to the value of '10'
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SET @@global.use_stat_tables = -1024;
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ERROR 42000: Variable 'use_stat_tables' can't be set to the value of '-1024'
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SET @@global.use_stat_tables = 2.4;
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ERROR 42000: Incorrect argument type to variable 'use_stat_tables'
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SET @@global.use_stat_tables = OFF;
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ERROR 42000: Variable 'use_stat_tables' can't be set to the value of 'OFF'
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SET @@session.use_stat_tables = 10;
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ERROR 42000: Variable 'use_stat_tables' can't be set to the value of '10'
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SET @@session.use_stat_tables = -2;
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ERROR 42000: Variable 'use_stat_tables' can't be set to the value of '-2'
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SET @@session.use_stat_tables = 1.2;
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ERROR 42000: Incorrect argument type to variable 'use_stat_tables'
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SET @@session.use_stat_tables = ON;
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ERROR 42000: Variable 'use_stat_tables' can't be set to the value of 'ON'
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SELECT * FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME='use_stat_tables';
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VARIABLE_NAME VARIABLE_VALUE
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USE_STAT_TABLES PREFERABLY
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SELECT * FROM INFORMATION_SCHEMA.SESSION_VARIABLES
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WHERE VARIABLE_NAME='use_stat_tables';
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VARIABLE_NAME VARIABLE_VALUE
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USE_STAT_TABLES COMPLEMENTARY
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SET @@global.use_stat_tables = @start_global_value;
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SELECT @@global.use_stat_tables;
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@@global.use_stat_tables
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NEVER
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SET @@session.use_stat_tables = @start_session_value;
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SELECT @@session.use_stat_tables;
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@@session.use_stat_tables
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NEVER
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set sql_mode='';
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