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The optimizer_prune_level is set by default.(a) True(b) FalseThis question was addressed to me during a job interview.The above asked question is from MySQL Query Optimizer in section Query Optimization of MySQL

Answer»

Right option is (a) True

Best explanation: In MYSQL, the optimizer_prune_level is on by default. This variable tells the OPTIMIZER to skip certain plans based on ESTIMATES of the NUMBER of rows ACCESSED for each table.



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