Create machine - readable instructions to execute the optimized sql 創(chuàng)建計(jì)算機(jī)可讀指令來(lái)執(zhí)行優(yōu)化的sql 。
The instruction fetch is a common operation for each instruction , and consists of reading an instruction from a location in memory 取指令對(duì)于每個(gè)指令來(lái)說(shuō)都是個(gè)普通操作,它包括從內(nèi)存單元中讀指令。