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5.3 merge
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@@ -1,22 +1,22 @@
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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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1
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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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1
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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 1
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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 1
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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 1
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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 1
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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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