Meta tables for WordPress

For some time, there has been a debate among WordPress developers about adding additional meta tables, like wp_postmeta and wp_usermeta.

The only thing that everyone seems to agree on is that a unified API for accesing metadata is necessary.

I propose we add meta tables on demand: Have a function that adds meta tables only when required by a plugin.

For example, if a plugin needs wp_commentmeta, it could do something like this:

register_activation_hook(__FILE__, 'need_commentmeta');
function need_commentmeta() {
  enable_meta_table('comment');
}

The enable_meta_table() function would check if wp_commentmeta exists and create it if it doesn’t. After that, the plugin can use the table without worries.

Advantages of this approach:

I think this approach would allow both consistency and flexibility.

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