你如何对MySQL和Postgres写一个不区分大小写的查询？ [英] How do you write a case insensitive query for both MySQL and Postgres?

问题描述

我在本地运行MySQL数据库进行开发，但是部署到使用Postgres的Heroku。 Heroku处理几乎一切，但我不区分大小写的Like语句变得区分大小写。我可以使用iLike语句，但我的本地MySQL数据库不能处理这个。

什么是最好的方式写一个不区分大小写的查询，兼容MySQL和Postgres？

解决方案

 
 code> select * from foo where upper（bar）= upper（？）; 
  

如果在调用者中将参数设置为大写，则可以避免第二个函数调用。 / p>

I'm running a MySQL database locally for development, but deploying to Heroku which uses Postgres. Heroku handles almost everything, but my case-insensitive Like statements become case sensitive. I could use iLike statements, but my local MySQL database can't handle that.

What is the best way to write a case insensitive query that is compatible with both MySQL and Postgres? Or do I need to write separate Like and iLike statements depending on the DB my app is talking to?

解决方案

select * from foo where upper(bar) = upper(?);

If you set the parameter to upper case in the caller, you can avoid the second function call.

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