startSetup(); $installer->getConnection()->dropColumn($this->getTable('eav_attribute'), 'attribute_name'); $installer->getConnection()->dropColumn($this->getTable('eav_attribute'), 'apply_to'); $installer->run(" ALTER TABLE {$this->getTable('eav_attribute')} ADD COLUMN `is_configurable` TINYINT(1) UNSIGNED NOT NULL DEFAULT 1; "); $installer->endSetup();