Any candidate row for step (n + 1) that already exists in the ancestor path is simply ignored. In Oracle, the usage looks like this.

对于第(n +1)步，任何在祖先中已经存在的候选行都将被忽略。

youdao

Any candidate row for step (n + 1) that already exists in the ancestor path is simply ignored. In Oracle, the usage looks like this.

对于第(n +1)步，任何在祖先中已经存在的候选行都将被忽略。

youdao