TYPO3 Core

Damn I messed up the context of the ticket but I think my point is clear ;)

Yeah. So, you have a dependency from your extension to tt_address. If you define this dependency in your ext_emconf.php, the PackageManager will take care that your extension is loaded after tt_address.

so basically, add tt_address as required extension in your ext_emconf, then unload and load the extension again via extension manager, and you will end up with your extension being loaded after tt_address in PackageStates.php

and always use $GLOBALS['TCA'] instead of $TCA to access global variables.

That makes sense but I have the dependency set up and still did not manage to get tt_address above my extension loaded (even not after reinstalling the extension in the ExtMngr).

But the installation where I'm currently working on is a big mess so I can't confirm now if any other thing is messing me up right now.

When thinking about it, it's clear for me that it can't be a core issue. So you can close this ticket for now.

Thanks for the quick feedback :)

Your dependency definition should like like that in your extension (adapt the lower / upper version numbers to fit to tt_address):

$EM_CONF[$_EXTKEY] = array(
    'title' => 'My awesome ext that depends on tt_address',
... // more stuff here in between
    'version' => '1.2.3',
    'constraints' => array(
        'depends' => array(
            'tt_address' => '1.2.23-2.5.42',
        ),
        'conflicts' => array(),
        'suggests' => array(),
    ),
);

Core version 6.2 series had some edge case issues in early releases, but with younger bugfix releases we're pretty sure the dependency resolving and load order stuff works well, since this is also covered pretty well by a group of tests.