I am using the fastsimpleimport module to create my custom import. This has a setDropdownAttributes() function to automatically create needed attribute values but it does not remove unused values. Those still show up in my advanced search.
How can I search and remove unused attribute values?
I think they are stored in eav_attribute_option_value but I am not sure how to check if they are used by a product.
LuFFy's answer is technically incorrect as it has 3 issues:
admin store view only leaving some store-views related garbagecatalog_product_entity_varchar and not catalog_product_entity_intThe query below addresses these problems:
DELETE o, v FROM `eav_attribute` a INNER JOIN `eav_attribute_option` o ON a.`attribute_id` = o.`attribute_id` INNER JOIN `eav_attribute_option_value` v ON v.`option_id` = o.`option_id` INNER JOIN `eav_entity_type` t ON t.`entity_type_id` = a.`entity_type_id` LEFT JOIN `catalog_product_entity_int` pi ON o.`option_id` = pi.`value` AND o.`attribute_id` = pi.`attribute_id` LEFT JOIN `catalog_product_entity_varchar` pv ON o.`option_id` = pv.`value` AND o.`attribute_id` = pv.`attribute_id` WHERE pi.`entity_id` IS NULL AND pv.`entity_id` IS NULL AND t.`entity_type_code` = "catalog_product" 
ON o.option_id = pv.value to ON FIND_IN_SET(o.option_id, pv.value) then this will correctly match multiple-select attributes. a.is_user_defined = 1 to your WHERE clause as well. You likely don't want to remove any attribute values from system attributes. delete c,b from eav_attribute a inner join eav_attribute_option b on a.attribute_id = b.attribute_id inner join eav_attribute_option_value c on c.`option_id` = b.option_id LEFT join catalog_product_entity_int pi on b.option_id=pi.value and pi.store_id=0 and b.attribute_id=pi.attribute_id where entity_id is null Try this Query..
