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46 lines
1.5 KiB
Plaintext
46 lines
1.5 KiB
Plaintext
SET @start_global_value = @@global.join_cache_level;
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select @@global.join_cache_level;
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@@global.join_cache_level
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2
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select @@session.join_cache_level;
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@@session.join_cache_level
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2
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show global variables like 'join_cache_level';
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Variable_name Value
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join_cache_level 2
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show session variables like 'join_cache_level';
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Variable_name Value
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join_cache_level 2
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select * from information_schema.global_variables where variable_name='join_cache_level';
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VARIABLE_NAME VARIABLE_VALUE
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JOIN_CACHE_LEVEL 2
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select * from information_schema.session_variables where variable_name='join_cache_level';
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VARIABLE_NAME VARIABLE_VALUE
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JOIN_CACHE_LEVEL 2
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set global join_cache_level=4;
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select @@global.join_cache_level;
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@@global.join_cache_level
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4
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set session join_cache_level=4;
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select @@session.join_cache_level;
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@@session.join_cache_level
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4
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set global join_cache_level=1.1;
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ERROR 42000: Incorrect argument type to variable 'join_cache_level'
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set session join_cache_level=1e1;
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ERROR 42000: Incorrect argument type to variable 'join_cache_level'
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set global join_cache_level="foo";
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ERROR 42000: Incorrect argument type to variable 'join_cache_level'
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set global join_cache_level=0;
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select @@global.join_cache_level;
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@@global.join_cache_level
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0
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set session join_cache_level=cast(-1 as unsigned int);
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Warnings:
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Note 1105 Cast to unsigned converted negative integer to it's positive complement
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Warning 1292 Truncated incorrect join_cache_level value: '18446744073709551615'
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select @@session.join_cache_level;
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@@session.join_cache_level
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8
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SET @@global.join_cache_level = @start_global_value;
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