注意事项? Note condition 操作时必须穿戴手套、工作服等防护用具?注意安全 You must wear protective equipment such as gloves, overalls ?
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Note that each triggering action includes an optional condition that evaluates if the action will be executed.
注意,每个触发操作都包含一个可选条件,用于评估操作是否将被执行。
Note: in this case tables T1 and T2 are joined without any condition, so every row in T1 matches every row in T2.
注意:本例中,表t1和T2的连接是不含任何条件的,因此,T 1中的每一行会匹配t 2中的每一行。
Note that condition functions are not asynchronously signal-safe and should not be called from a signal handler.
注意,条件函数并不是异步信号安全的,因此不能在信号处理函数中调用。
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