`
def classLoader = ClassLoader.systemClassLoader
while (classLoader.parent) {
classLoader = classLoader.parent
}
classLoader.addURL(new File("/var/jenkins_home/.groovy/grapes/mysql/mysql-connector-java/jars/mysql-connector-java-8.0.19.jar").toURL())
if (params.USE_EXTERNAL_MYSQL) {
def sql = Sql.newInstance("${params.EXTERNAL_MYSQL_CONNECTION_STRING}",
"${params.EXTERNAL_MYSQL_USERNAME}",
"${params.EXTERNAL_MYSQL_PASSWORD}",
'com.mysql.jdbc.Driver'
)`