If you are using the RBO, then a merge join is the most efficient join when a join returns a large number or rows.
如果你使用RBO方式，那么一个合并连接是最有效的连接，当一个连接返回一个大数量或行。
2
There is little point comparing an execution plan to the RBO plan and being surprised if you get a different execution plan.
和RBO计划相比，执行计划只有相同的很少，你会得到一个不同的执行计划。
3
Lipase could lead the oil hydrolyzed if the rice bran not passivated in time especially in the high temperature, which in order to increase the acid value of RBO.