The SIGNAL statement rolls back the changes that were attempted by the triggering statement (that is, our update statement).

SIGNAL 语句回滚由触发语句（也就是我们的 update 语句）尝试的更改。

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If no "Plan B" can be found by Monday, the ECB may cut off funding to the island's banks, it said in a statement, triggering their collapse and possibly the country's exit from the euro.

BBC: Cyprus MPs due to vote on new plan to secure bailout