如何在Postgres中将WHERE语句与OR数组组合使用？
[英]How to use a WHERE statement in Postgres with an array of OR combinations?
问题描述
I'm not sure how to phrase this question, but the premise is I have a table where the primary key is defined by two columns: row and col . 
我不确定如何表达这个问题，但是前提是我有一个表，其中主键由两列定义： row和col 。 I also want to query for many individual columns, which is where my problem comes into play. 我还想查询许多单独的列，这就是我的问题所在。
If I had a simple column named id , I would be able to do a clause such as WHERE id=ANY($1) where $1 is an array of integers. 如果我有一个名为id的简单列，我将可以执行WHERE id=ANY($1)这样的子句，其中$1是整数数组。 However, with a primary key consisting of two columns, I wouldn't be able to the same. 但是，如果主键由两列组成，我将无法做到相同。
WHERE row=ANY($1) AND col=ANY($2) gives me a region of what I want, but not the exact set of tuples that I need. WHERE row=ANY($1) AND col=ANY($2)给了我想要的区域，但没有我所需的确切元组集。 Right now I'm generating a template query string with many conditions, such as: 现在，我正在生成具有许多条件的模板查询字符串，例如：
WHERE row=$1 AND col=$2 OR
row=$3 AND col=$4 OR ...
How can I avoid generating this "query template"? 如何避免生成此“查询模板”？ I don't think this is a very elegant solution, but it's the solution I have right now. 我认为这不是一个非常优雅的解决方案，但这是我现在拥有的解决方案。 Any insight would be appreciated! 任何见识将不胜感激！
1 个解决方案
解决方案1
1 已采纳 2017-09-24 00:37:15
where (row,col) = any(array[(1,2),(3,4)])
要么
where (row,col) in ((1,2),(3,4))
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.