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Mysql Query Optimization

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  1. Which system variable tells how far into the rest of each incomplete plan the optimizer should look to evaluate whether it should be expanded further?
    1. optimizer_search_depth
    2. optimizer_search
    3. optimizer_prune
    4. optimizer_prune_level
    5. None of these
Correct Option: A

In MySQL, the optimizer_search_depth system variable tells how far into the “future” of each incomplete plan the optimizer should look to evaluate whether it should be expanded further.


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