JOOQ嵌套条件 [英] JOOQ nested condition

问题描述

我正在尝试弄清楚如何在jooq中写这样的东西

Hi i am trying to figure out how to write something like this in jooq

select * from table 
where ( ( a = query or b = query or a = query ) 
and ( e = query or g = query or z = query) )

我不知道如何在jooq中执行嵌套条件.请帮忙.

I cant figure out how to do nested condition in jooq. Please help.

推荐答案

您需要了解API的以下部分:

You'll need to understand the following part of the API:

public interface Condition {
    Condition and(Condition other);
    Condition or(Condition other);
}

因此，任何Condition都可以使用and()/or()方法(以及其他方法)与其他Conditions连接.就您而言，您可以像这样轻松地形成条件:

So any Condition can be connected with other Conditions using and() / or() methods (and others). In your case, you can form your conditions easily like this:

Condition c1 = a.equal(query);
Condition c2 = b.equal(query);
Condition c3 = a.equal(query);

Condition d1 = e.equal(query);
Condition d2 = g.equal(query);
Condition d3 = z.equal(query);

现在可以这样连接这些条件:

Now these conditions can be connected as such:

c1.or(c2).or(c3).and(d1.or(d2).or(d3));

或放入SQL语句:

create.select()
      .from(table)
      .where(c1.or(c2).or(c3)
        .and(d1.or(d2).or(d3)));

当然，您不必将c[1-3], d[1-3]条件分配给变量.您可以将所有内容内联到一个语句中:

Of course, you don't have to assign your c[1-3], d[1-3] conditions to variables. You could inline everything to a single statement:

create.select()
      .from(table)
      .where(a.equal(query).or(b.equal(query)).or(a.equal(query))
        .and(e.equal(query).or(g.equal(query)).or(z.equal(query)));

您将在手册中找到更多信息:

You'll find more information in the manual:

http://www.jooq.org/doc /3.0/manual/sql-building/conditional-expressions/

这篇关于JOOQ嵌套条件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！