public function getDropFieldSQL($xmldb_table, $xmldb_field) {

        $results = array();

        // Get the quoted name of the table and field
        $tablename = $this->getTableName($xmldb_table);
        $fieldname = $this->getEncQuoted($xmldb_field->getName());

        // Build the standard alter table drop
        $results[] = 'ALTER TABLE ' . $tablename . ' DROP COLUMN ' . $fieldname;

        return $results;
    }