support mysql insert ignore into

## Why you need it?
Support mysql insert ignore into
If you want to fix it, please comment "Please assign it to me" is this issue.

支持MySQL的insert ignore into 的语法

如果你有兴趣修复这个问题的话, 请在下方留言 Please assign it to me

## How it could be?
A clear and concise description of what you want to happen. You can explain more about input of the feature, and output of it.

## Other related information
Add any other context or screenshots about the feature request here.