i need to create custom sql function, use it and delete it with magento install script. But it do not work. how to create sql function in magento install scipt? P. S. if i create this function in my database and then only use it in script it works

/* @var $installer Enterprise_CatalogPermissions_Model_Mysql4_Setup */
$installer = $this;


$connection = $installer->getConnection();

try {
    $sql = "
    DROP FUNCTION IF EXISTS `regex_not_match_replace`;
        DELIMITER ||
        CREATE FUNCTION  `regex_not_match_replace`(pattern VARCHAR(1000),replacement VARCHAR(1000),original VARCHAR(1000))
        RETURNS VARCHAR(1000)
         DECLARE temp VARCHAR(1000);
         DECLARE ch VARCHAR(1);
         DECLARE i INT;
         SET i = 1;
         SET temp = '';
         IF original NOT REGEXP pattern THEN
          loop_label: LOOP
           IF i>CHAR_LENGTH(original) THEN
            LEAVE loop_label;
           END IF;
           SET ch = SUBSTRING(original,i,1);
           IF NOT ch NOT REGEXP pattern THEN
            SET temp = CONCAT(temp,ch);
            SET temp = CONCAT(temp,replacement);
           END IF;
           SET i=i+1;
          END LOOP;
          SET temp = original;
         END IF;
         RETURN temp;
        DELIMITER ;

        UPDATE catalog_product_entity_copy
        SET  sku = regex_not_match_replace('^[ҐЄ-ЇА-ЯЁёA-Z0-9\\/~*#@$%^&.,|_?!+-}{[.left-parenthesis.][.right-parenthesis.]]{1,}$','', sku)
        WHERE not sku REGEXP '^[ҐЄ-ЇА-ЯЁёA-Z0-9\\/~*#@$%^&.,|_?!+-}{[.left-parenthesis.][.right-parenthesis.]]{1,}$';

    DROP FUNCTION IF EXISTS `regex_not_match_replace`;

catch (Exception $e) {
    throw $e;


Seems it is not possible or maybe i need some permissions. My decision is that i add this function by hands in database

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