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解决办法:
set global optimizer_switch='derived_merge=off';
set optimizer_switch='derived_merge=off';
select @@optimizer_switch;
select @@GLOBAL.optimizer_switch;
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ok。
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解决办法:
set global optimizer_switch='derived_merge=off';
set optimizer_switch='derived_merge=off';
select @@optimizer_switch;
select @@GLOBAL.optimizer_switch;
ok。
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