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select 1+1;
1+1
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select 1+2;
1+2
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SHOW GLOBAL VARIABLES LIKE 'thread_handling';
Variable_name Value
thread_handling no-threads
select @@session.thread_handling;
ERROR HY000: Variable 'thread_handling' is a GLOBAL variable
set GLOBAL thread_handling='one-thread';
ERROR HY000: Variable 'thread_handling' is a read only variable
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