“如果这样会怎样的分析”使用了虚拟索引来评估索引的效果。

The "what-if analysis" USES a virtual index under the covers to assess the effective of the indexes.

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现在将用优化器根据实际和虚拟索引选择的访问计划来填充解释表。

This now populates the explain tables with the access plan chosen by the optimizer based on real and virtual indexes.

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第一，虚拟索引表和字节偏移量是针对变化的时候，当虚拟机更新了。

First, table indices and byte offsets are subject to change if the VM is updated.

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