$this->addSql('CREATE TABLE parameters (id INT AUTO_INCREMENT NOT NULL, name VARCHAR(255) NOT NULL, symbol VARCHAR(255) NOT NULL, value_min DOUBLE PRECISION DEFAULT NULL, value_typical DOUBLE PRECISION DEFAULT NULL, value_max DOUBLE PRECISION DEFAULT NULL, unit VARCHAR(255) NOT NULL, value_text VARCHAR(255) NOT NULL, param_group VARCHAR(255) NOT NULL, last_modified DATETIME DEFAULT CURRENT_TIMESTAMP NOT NULL, datetime_added DATETIME DEFAULT CURRENT_TIMESTAMP NOT NULL, type SMALLINT NOT NULL, element_id INT NOT NULL, INDEX IDX_69348FE1F1F2A24 (element_id), PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8mb4 COLLATE `utf8mb4_unicode_ci` ENGINE = InnoDB');