The table FIRST option allows you to specify a list of tables that should have precedence over the others during data redistribution.
TABLE FIRST选项允许指定数据重分发期间优先于其他表的一组表。
Some of the operators have the wrong precedence; some parts of the syntax could be better.
有一些运算符的优先级不合适;语法的一些部分还可以做得更好。
If the operators all have the same precedence, then the order of evaluation depends on their associativity.
如果所有操作符优先级一样,那么求值顺序就取决于它们的结合性。
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