Compare two meta key values against each other inside the get_posts array?

I’m banging my head to the wall all day trying to figure this out.

I have two meta keys a1 and a2 with numbers inside.

I’m trying to show posts that are a2 > a1.

In a nutshell, here’s what I’m trying to accomplish:

    $posts = get_posts(array(
        'post_type'         => 'post',
    
    
        'meta_query' => array(
//return both meta keys       
            array(
                'key'            => 'a1',
            ),
            array(
                'key'            => 'a2',
            ),
//only show posts that a2 meta_value is greater than a1  meta_value
            'a2' > 'a1'
        ),
        
    ));

I know it should be possible to do this somehow.

I’m not the only one in the world trying to compare whether one post’s meta_key value is greater than other…

Desperately need help or any kind of solution.

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Compare two meta key values against each other inside the get_posts array?

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