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After a module update, my site has become un-usable, and only shows a php error message. I tried circumventing the problem with drush cc, but that didn't help.

Also tried with a custom php script but that has issues finding my 'DRUPAL_ROOT'

I just want to clear the cache tables from Drupal 7 directly on the mysql server, but I'm unsure which tables should be cleared for that and especially which I should not clear.

Do I just need to clear all the [SITE-PREFIX_]cache* tables?

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Could you please add the query you used? – ipwa Feb 13 '12 at 20:10
actually I was looking for a Query to use with something like: `EMPTY WHERE tablename IS LIKE 'prefix_chache%' but in the end I just used phpmyadmin to drop the tables because I couldn't find such a query. – FLY Feb 14 '12 at 7:54

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Any well written module that has a cache, should prefix it with cache, meaning that the answer to your question is "Yes".

In the odd event that a module caches data somewhere else, you can check your modules for implementations of hook_flush_caches, and see what they remove.

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