Agent 2: NS lock WAITING on main table row ID (0; a) (from select).

代理2：ns锁对于主表行(0；a)为WAITING(由于select)。

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Agent 2: NS lock GRANTED on child table row ID (0.4) (from select).

代理2：ns锁对子表行ID(0.4)为GRANTED(由于select)。

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Agent 2: NS lock GRANTED on child table row ID (0.4) (from select).

代理2：ns锁对子表行ID(0.4)为GRANTED(由于select)。

youdao