在jOOQ&中优化了数组吗? PostgreSQL的? [英] Are arrays optimized in jOOQ & PostgreSQL?

问题描述

我有一大堆标识符，我想像这样添加到WHERE子句中:

I have a large list of identifiers which I would like to add to the WHERE clause like this:

identifier IN (..., ..., ..., ...)

但是，这非常慢，因为它必须分别绑定每个值.请记住，该列表很长(几乎1000个值).在这种情况下，最好使用:

However, that is pretty slow, because it has to bind each value individually. Remember, the list is pretty long (almost 1000 values). In such case, it is better to use:

identifier = ANY({..., ..., ..., ...})

现在，我们只绑定一次数组.

Now, we are only binding the array, just once.

我尝试在jOOQ中这样做:

I tried doing that in jOOQ:

Integer[] values = {..., ..., ..., ...}
DSL.any(DSL.array(values))

生成以下SQL:

"identifier" = any (array[?, ?, ?, ...])
TRACE | 2017-08-24 10:02:08,914 | JooqLogger.java | 187 | Binding variable 1       : ...
TRACE | 2017-08-24 10:02:08,947 | JooqLogger.java | 187 | Binding variable 2       : ...
TRACE | 2017-08-24 10:02:08,958 | JooqLogger.java | 187 | Binding variable 3       : ...
...

那么，这使我得出结论，我们仍在分别绑定每个值?有没有办法对此进行优化?

So, this makes me conclude that we are still binding each value separately? Is there a way to optimize this?

推荐答案

替换:

DSL.any(DSL.array(values));

使用:

DSL.any(values);

创建单个绑定变量.

或者，您可以显式创建该绑定变量:

Alternatively, you could create that bind variable explicitly:

Field<Integer[]> array = DSL.val(values);
DSL.any(array);

这篇关于在jOOQ&中优化了数组吗? PostgreSQL的?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！